STORMWATER RETENTION CAPABILITIES OF STEEP SLOPED, EXTENSIVE
GREEN ROOF SYSTEMS
By
Erik Cronk

A THESIS
Submitted to
Michigan State University
in partial fulfillment of the requirements
for the degree of
MASTERS OF ARTS
Environmental Design
2012

ABSTRACT
STORMWATER RETENTION CAPABILITIES OF STEEP SLOPED, EXTENSIVE
GREEN ROOF SYSTEMS
By
Erik Cronk
Over the last 50 years, the world has seen a dramatic population shift from rural
areas to urban city centers. In the United States, this change in urbanization has created
large impervious surface areas, which have altered the natural processes of the earth’s
hydrologic cycle by increasing the quantity and flow rates of stormwater runoff
impacting highly urbanized areas. In urbanized environments of the United States,
sloped roofs account for a large portion of total impervious area (TIA) because single
family homes, typically built with sloped roofs, represent the majority of building
construction. Green roofs are considered one type of best management practice to help
manage stormwater in urban areas.
To date, there has been extensive research done on the stormwater performance of
flat green roof systems, but limited data exists on the performance of steep sloped green
roofs. If the full stormwater management potential of green roofs is going to be realized,
there needs to be wide-scale adoption of green roof technology in our residential housing
stock.
Data from this study shows that on average, significantly larger volumes of
rainwater are retained and released in delayed peak flow scenarios per rain event, when
green roofing materials cover a sloped roof than when traditional roofing materials are
used. Green roofing materials retained approximately 40% of cumulative rainfall and
traditional roofing materials retained approximately 10% of cumulative rainfall.

ACKNOWLEDGEMENTS

There are numerous people that deserve acknowledgement for giving input into the
completion of this thesis. First of all, I would like to thank my major professor, Dr.
Joanne Westphal. Your dedication, knowledge, and most importantly patience during my
graduate career are the reason I was successful in completing my degree. Also, I would
like to recognize the two other members of my graduate committee, Dr. Brad Rowe and
Dr. Jeff Andresen who provided insight and guidance throughout the entire research
process. I would also like to acknowledge fellow graduate students Jeremiah Johnson,
Kevin Krogulecki and Jeremy Monsma who have helped in various aspects of my
research project. This experience has taken us across the world and back and I cherish
the friendships we have created. Finally, I would like to thank my family for their
continued support during my twenty years of education and always encouraging me to
achieve my goals in life.

iii

TABLE OF CONTENTS

LIST OF TABLES ...............................................................................................................v
LIST OF FIGURES ........................................................................................................... ix
INTRODUCTION ...............................................................................................................1
LITERATURE REVIEW ....................................................................................................4
Urbanization and its Affect on Ecosystem Services.....................................................4
Water Management Services Provided by Green Roofs ..............................................7
Other Ecosystem Services Provided by Green Roofs Throughout History ...............10
Practical Aspects of Green Roof Design on Ecosystem Services ..............................15
HYPOTHESES ..................................................................................................................17
MATERIALS AND METHODS .......................................................................................19
Site Description ..........................................................................................................19
Roof Testing Platforms...............................................................................................19
Drainage System and Water Retention.......................................................................20
Soil Type, Vegetation Type and Roofing Materials ...................................................20
Treatments ..................................................................................................................21
Data Collection ...........................................................................................................22
Data Analysis..............................................................................................................23
RESULTS ..........................................................................................................................24
DISCUSSION ....................................................................................................................29
APPENDIX ........................................................................................................................34
BIBLIOGRAPHY ............................................................................................................123

iv

LIST OF TABLES

Table 1. Anova table for percent retention over two growing seasons (1 April 2010 to
31 October 2011) from five roof platform treatments, replicated three times
with retention being the dependent variable and roof treatment and rain
category the independent variables..…………………………………………...35
Table 2. Average percent retention, organized by rainfall category, over 2 growing
seasons (1 May 2010 to 31 October 2011) from 5 roof treatments replicated
3 times. A total of 63 measured rain events are included with 25 light
(<5mm), 21 medium (5 – 14 mm), and 17 large (>17 mm) rain events
respectively…………………………………………………………………….36
Table 3. Tukey’s Studentized Range (HSD) Test for percent retention for light, medium,
and large rainfall categories over 2 growing seasons (1 May 2010 to 31 October
2011) from five roof treatments replicated three times…..……………...….....37
Table 4. Data from rain event on 4/3/2010……………………………………………...38
Table 5. Data from rain event on 4/25/2010…………………………………………….39
Table 6. Data from rain event on 4/30/2010…………………………………………….40
Table 7. Data from rain event on 5/2/2010……………………………………………...41
Table 8. Data from rain event on 5/4/2010……………………………………………...42
Table 9. Data from rain event on 5/5/2010……………………………………………...43
Table 10. Data from rain event on 5/13/2010…………………………………………...44
Table 11. Data from rain event on 5/21/2010…………………………………………...46
Table 12. Data from rain event on 6/4/2010…………………………………………….47
Table 13. Data from rain event on 6/5/2010…………………………………………….48
Table 14. Data from rain event on 6/8/2010…………………………………………….49
Table 15. Data from rain event on 6/11/2010…………………………………………...50
Table 16. Data from rain event on 6/15/2010…………………………………………...51
Table 17. Data from rain event on 6/22/2010…………………………………………...52

v

Table 18. Data from rain event on 6/24/2010…………………………………………...53
Table 19. Data from rain event on 6/26/2010…………………………………………...54
Table 20. Data from rain event on 6/27/2010…………………………………………...55
Table 21. Data from rain event on 7/5/2010…………………………………………….57
Table 22. Data from rain event on 7/8/2010…………………………………………….58
Table 23. Data from rain event on 7/12/2010…………………………………………...59
Table 24. Data from rain event on 7/14/2010…………………………………………...60
Table 25. Data from rain event on 7/20/2010…………………………………………...61
Table 26. Data from rain event on 7/22/2010…………………………………………...62
Table 27. Data from rain event on 7/28/2010…………………………………………...63
Table 28. Data from rain event on 7/31/2010…………………………………………...64
Table 29. Data from rain event on 8/6/2010…………………………………………….65
Table 30. Data from rain event on 8/8/2010…………………………………………….66
Table 31. Data from rain event on 8/11/2010…………………………………………...67
Table 32. Data from rain event on 8/14/2010…………………………………………...68
Table 33. Data from rain event on 8/19/2010…………………………………………...69
Table 34. Data from rain event on 9/6/2010…………………………………………….70
Table 35. Data from rain event on 9/7/2010…………………………………………….71
Table 36. Data from rain event on 9/11/2010…………………………………………...72
Table 37. Data from rain event on 9/15/2010…………………………………………...73
Table 38. Data from rain event on 9/18/2010…………………………………………...75
Table 39. Data from rain event on 9/23/2010…………………………………………...76
Table 40. Data from rain event on 10/1/2010…………………………………………...78

vi

Table 41. Data from rain event on 10/21/2010………………………………………….79
Table 42. Data from rain event on 10/23/2010………………………………………….80
Table 43. Data from rain event on 10/26/2010………………………………………….82
Table 44. Data from rain event on 5/10/2011…………………………………………...83
Table 45. Data from rain event on 5/11/2011…………………………………………...84
Table 46. Data from rain event on 5/19/2011…………………………………………...85
Table 47. Data from rain event on 5/21/2011…………………………………………...86
Table 48. Data from rain event on5/25/2011……………………………………………87
Table 49. Data from rain event on 5/31/2011…………………………………………...88
Table 50. Data from rain event on 6/8/2011…………………………………………….89
Table 51. Data from rain event on 6/11/2011…………………………………………...90
Table 52. Data from rain event on 6/15/2011…………………………………………...91
Table 53. Data from rain event on 6/19/2011…………………………………………...92
Table 54. Data from rain event on 6/20/2011…………………………………………...93
Table 55. Data from rain event on 6/22/2011…………………………………………...94
Table 56. Data from rain event on 7/18/2011…………………………………………...96
Table 57. Data from rain event on 8/2/2011…………………………………………….97
Table 58. Data from rain even on 8/12/2011……………………………………………98
Table 59. Data from rain event on 8/23/2011…………………………………………...99
Table 60. Data from rain event on 9/2/2011…………………………………………...100
Table 61. Data from rain event on 9/3/2011…………………………………………...101
Table 62. Data from rain event on 9/15/2011………………………………………….102
Table 63. Data from rain event on 9/19/2011………………………………………….103

vii

Table 64. Data from rain event on 9/21/2011………………………………………….104
Table 65. Data from rain event on 10/18/2011………………………………………...105
Table 66. Data from rain event on 10/23/2011………………………………………...106

viii

LIST OF FIGURES

Figure 1. Graphic representation of land use change and its effects on stormwater
runoff, evapotranspiration, and infiltration….……….……………………...107
Figure 2. Graphic representation of the hydrologic cycle….……..……………………108
Figure 3. Example of early birch bark waterproof membrane technique, Norwegian
farmstead, West Norwegian Folk-Art Institute, Voss, Norway……………...109
Figure 4. Location map of study site on the Old Mission Peninsula, MI…….………..110
Figure 5. 0.045mm EPDM rubber membrane used for waterproofing in study
plots.….…..………………………………………………………………….111
Figure 6. Three green roof treatments draining to catch rainwater into separate tipping
bucket measuring devices…………………..…………………….…………112
Figure 7. Plant coverage in each green roof treatment, one year after planting. Average
plant cover for sedum and native grass partitions was 90% and 95%,
respectively………………………………………………………………….113
Figure 8. Conventional roofing treatments to allow draining into separate tipping bucket
measuring devices……………...……………………………………………114
Figure 9. Roofing treatments arranged in a stratified design with the conventional
roofing treatments occupying two platforms in an alternate pattern, and each
of the three green roof treatments found on three other platforms in a
rotated manner…………………………………………………………..…..115
Figure 10. Daily precipitation (mm) during the experimental study (1 May 2010 to 31
October 2010). Data was collected from a weather station located on the
study site adjacent to the research platforms….………………………….…116
Figure 11. Frequency of rain events during the field experiment (1 May 2010 to 31
October 2010). Data is from the Michigan Automated Weather Network’s
weather station located on the Old Mission Peninsula, MI…………………117
Figure 12. Daily maximum and minimum temperatures (Co) during the experimental
study (1 May 2010 to 31 October 2010). Data is from the Michigan
Automated Weather Network’s weather station located on the Old Mission
Peninsula, MI..………………………………………………………………118

ix

Figure 13. Runoff hydrographs of selected representative (A) light (2.54 mm),
(B) moderate (8.38 mm), and (C) heavy (13.46 mm) rain events. Lines
represent runoff (mm) from media-only, sedum, grass, steel and shingle
roof treatments. Values are averages of measurements taken using three
tipping bucket rain gauges. Note the different x and y axis scales..……….119
Figure 14. Cummulative runoff hydrographs of selected representative (A) light
(2.54 mm), (B) medium (8.38 mm), and (C) heavy (13.46 mm) rain
events. Lines represent runoff (mm) from media-only, sedum, grass, steel
and shingle roof treatments. Values are averages of measurements taken
using three tipping bucket rain gauges. Note the different x and y axis
scales………………………………………………………………………..121

x

INTRODUCTION
Urbanization creates numerous environmental impacts while negatively affecting
the health and welfare of the general public. Construction of buildings, roads and
infrastructure, coupled with the extraction and use of natural resources and increases in
pollution, have detrimental effects on the hydrologic cycle, carbon cycle, and biological
diversity in a given area. As urbanization occurs, the amount of total impervious area
(TIA) in a watershed increases, effectively altering the natural hydrology of the
watershed. This modification of land use from vegetated groundcovers and forest land
prohibits natural patterns of rainwater infiltration into the receiving soil profiles and
creates stormwater runoff. Stormwater runoff has become a major area of concern for
developing communities due to water supply contamination, peak flow events that create
severe flooding and threaten lives, and disruption of municipal services. As development
continues to put pressure on the surrounding environment, watershed managers are
looking for new “best management practices” (BMP) to handle the problems associated
with stormwater management in urban areas.
Green roofs, or vegetated roofs, are considered a relatively new roofing
technology in North America that entails growing plants in a media layer on top of a
waterproof membrane. It is widely recognized that one of the greatest benefit green roofs
offer is stormwater retention in urban areas (Vanwoert et al., 2005; Berndtsson, 2010).
The USEPA has indicated that a typical city block generates more than five times as
much runoff than a woodlot of the same size (USEPA, 2003). Green roofs can mitigate
impervious surfaces created on building rooftops by providing stormwater retention in
these spaces, essentially restoring the vegetation that existed in that space before the
1

development occurred. This is critically important in urban areas where space is limited
for conventional stormwater BMP’s such as detention ponds. Green roofs are becoming
increasingly popular as a sustainable design strategy because of the numerous
environmental, economic, and social benefits that they provide.
There has been extensive research done on the numerous ecosystem services of
green roofs which include stormwater retention, increased building energy efficiency,
extended roof life, reduced heat island effect, etc. However, most of the green roof
research to date has been limited to flat roofs. Only a few studies examine how the
performance of a green roof changes under steep slope conditions. This oversight is
important because typical construction of residential structures in the northern climate of
the United States have steep (>10%) sloped roofs to prevent snow accumulation.
Because most residences in the United States occupy approximately 30% of a standard
one acre lot, this could represent a significant reduction in the amount of TIA in urban
and suburban areas. This reduction could have major implications for watershed
hydrology if green roof technology were applied to large portions of a community.
In this paper, the author provides an overview of the impacts of urbanization on
the hydrologic cycle and specifically interprets and analyzes differences in stormwater
retention data under steep (>10%) sloped conditions between green roofs and
conventional roofing materials. The study further investigates differences in stormwater
retention on steep sloped green roofs under three different treatments: unvegetated
(growing media only), sedum vegetated and native grass vegetated, and why differences
occurred. The purpose of this analysis is to begin to generate performance data on

2

different types of green roof vegetation and their ability to increase a green roof’s
stormwater retention capabilities.
This study addresses baseline stormwater retention performance data for an
extensive (<6” (15.2cm)) green roof system only versus conventional roofing materials.
The limits of analysis will be confined to the specific green roof system described in the
experimental design. This paper will not investigate other types of green roof systems for
comparison (eg. intensive >6” (15.2cm)) nor will it interpret or model the potential
effects of community-wide adaption of green roof technology on stormwater
management in urban and suburban areas. While it is important for these issues to be
further addressed, the results of this study are meant to provide baseline data on semiintensive, sloped green roofs that could be used in such future research endeavors.
In the context of this paper, there are several important terms that need to be
defined in order to help the reader understand the problem being investigated. The term
extensive, sloped green roof refers to a green roof system with less than six inches
(15.2cm) of growing media, while intensive green roofs have >6” (15.2cm) depth. Most
conventional sloped roofs in the United States employ 4:12 trussing system giving them a
33 degree slope. Normally, the conventional roofing materials used to cover these roofs
are steel roofing panels or fiberglass shingles. Independent rain events are defined as
precipitation events that were separated by six or more hours. In the event runoff was
still occurring six hours after the initial rainfall event, the two events were combined.
Stormwater runoff is defined as the amount of rainfall released from the roofing system
after a storm event; peak flow refers to the highest level of stormwater runoff recorded
for a given rain event during a 5 minute time period. The term total impervious area
3

(TIA) means all areas within the urban matrix that are impervious and restrict rainwater
infiltration and includes building, roads, parking lots, etc.
LITERATURE REVIEW
Urbanization and its Affect on Ecosystem Services.
Throughout human history, the majority of the world’s population has lived in
rural areas. However, the last half of the 20th century has seen a shift in human
population from rural areas to urban areas. According to the United Nations, the world’s
urban population has reached 2.3 billion as of the year 2000, a figure nearly four times as
large as that estimated for 1950 (United Nations, 2006). This rapid increase in urban
population has detrimental effects on the surrounding environment. Natural,
undeveloped lands are typically more pervious, allowing rainwater to infiltrate back into
the soil profile and groundwater. Impervious surfaces cause an increase in the total
volume of stormwater runoff and also increase the rate in which stormwater is delivered
to a receiving body of water. Both the National Oceanic and Atmoshpheric
Administration (NOAA) and Pennsylvania State University estimate that there are 25
million acres of impervious surfaces in the continental United States (Beach, 2002). In
urban areas, it is not uncommon for impervious surfaces to account for 45% or more of
the land cover (Kloss, 2006). Studies show that hydraulic and biological changes to
streams occur when 10 to 20 percent of a watershed has impervious surfaces (Clar, 2004).
As urban development continues to sprawl, the conversion of land cover changes from
forested and vegetated lands to impervious surfaces disrupts the natural hydrologic cycle
(Figure 1) and creates stormwater management problems.

4

Urbanization has a profound affect on how water travels both above and below
the earth’s surface following a storm event by limiting rainwater infilitration and
increasing stormwater runoff quantities. Urban development has contributed greatly to
the pollution of our nation’s waters because increased quantities of stormwater carry
large amounts of suspended and/or dissolved pollutants to waterways. These pollutants
include bacteria, metals, nutrients, oils and grease, pesticides, sediment, and trash. Under
natural conditions, the amount of rain that is converted to runoff is less than 10% of the
rainfall volume (United States Environmental Protection Agency, 2003). Unlike
agriculture, which can display significant interchange with forest cover over the time
scales of a century, there is no indication that once-urbanized land ever returns to a less
intensive, naturalized state (National Research Council, 2009). Therefore the
construction activities associated with urbanziation such as clearing vegetation, stripping
topsoil, and increasing impervious areas through hardscaping will have detrimental
impacts on the surrounding environment.
Ecosystem Services (ES) are the benefits provided to humans by ecosystems.
These include provisioning services (food, water, timber, etc.), regulating services
(climate, flooding, water quality), cultural services (recreation, aesthetics, spiritual
fulfillment), and supporting services (soil formation, pollination, nutrient cycling).
Urbanization strongly impacts an ecosystem and the services it provides to humans in an
area. Over the past 50 years, humans have changed ecosystems more rapidly and
extensively than in any comparable period of time in human history; this change is
largely to meet rapidly growing demands for food, fresh water, timber, fiber, and fuel
(Millennium Ecosystem Assessment, 2005).
5

The earth holds vast amounts of water beneath its land surface, on its surface, and
in its atmosphere. This water is in constant motion and is known as the hydrologic cycle.
The hydrologic cycle is comprised of three main phases: (1) precipitation and runoff; (2)
infiltration and storage; and (3) evaporation and transpiration (Achuthan, 1974). Water
moves through various aspects of the hydrologic cycle and eventually reaches the oceans
where it will be evaporated back into the atmosphere to repeat the cycle again (Figure 2).
Precipitation that reaches the earth’s surface either infiltrates into the earth’s surface or
becomes surface runoff. The volume and speed of runoff depends on the size of the
storm (how much water falls in a certain amount of time) and the land features of the site
(Clar, 2004). Transpiration is the process by which plants take up water via their roots in
the soil and release it to the atmosphere in the form of water vapor through the process of
photosynthesis. Evaporation occurs when water is transformed from a liquid to a gas and
moves back into the atmosphere. It is often times difficult to distinguish between
transpiration and evaporation effects occurring in the hydrologic cycle. Therefore, these
two processes are often viewed as one process called evapotranspiration (ET). This
includes water that is used by plants during transpiration and water that is evaporated
from plants or earth surfaces.
The hydrologic cycle is a regulating service provided by ecosystems and is
critical in protecting the health and safety of the general public. Wetlands, forests, and
other vegetated lands help manage rainwater by intercepting, infiltrating, and filtering
rainwater as it reaches the earth. Trees with mature canopies can absorb the first half
inch of rainfall during a storm event (Casey, 2012). This regulating, ecosystem service is
greatly reduced by urban development and increased imperviousness because of the
6

elimination of vegetation that acts to absorb rainwater. Instead of absorbing rainwater
and infiltrating it, large amounts of impervious surfaces in urban areas increase the
volume and rate of stormwater runoff.
Soils also play a dominant role in the hydrologic cycle because soils usually
absorb, store, and release precipitation (Saxton, 1990). This is important because urban
development greatly impacts the natural soil profiles by compacting soil structure,
creating uniform grades (through site elevation changes) that reduce natural low spots for
water collection, and by removing vegetation. Plants at the earth’s surface provide
natural conduits for rainwater through their root systems. Likewise, groundcover foliage
absorbs much of the impact of raindrops hitting the soil, thereby reducing soil erosion.
Small organisms like worms, insects and burrowing animals also improve the collecting
capabilities of the earth’s mantle by creating/maintaining pore space and keeping the soil
in the top horizons friable.
Water Management Services Provided by Green Roofs
Reintroducing some of the natural components of the hydrologic cycle, that
encourage infiltration and storage, can be partially fulfilled by implementing green roofs.
Green roofs, by reintroducing soil and vegetation into areas that are impervious, have the
capacity to partially reverse the degradation to drainage systems that increased
stormwater runoff, erosion, siltation, and/or bacterial contamination causes. Many
consider stormwater runoff mitigation to be the primary benefit of green roofs in the task
of reversing failing stormwater management infrastructure (Liptan, 2003). Green roofs
have been reported to retain 39 to 100 percent of rainfall, with an average retention just
under 78 percent (Carter, 2006). Even though green roof systems retain stormwater,
7

runoff will still occur once the green roof becomes saturated. However, there is a delay
in stormwater runoff because it takes time for rainwater to move through the vegetation
and media layers; this is due to the additional time needed to saturate the media and reach
the roof’s water carrying capacity. This delay is beneficial to municipal sewer systems
because it helps reduce peak storm water volumes and flow rates, and thus, increase the
time interval between a storm and release of water to the receiving watershed. Green
roofs can delay runoff between 34 minutes (Carter and Rasmussen 2006) and four hours
(DeNardo et al., 2005), compared to reference roofs where runoff was nearly
instantaneous. Water retention is a function of product design including factors like
substrate depth, media composition, and plant selection which determines root
morphology; other factors thought to affect green roof performance include roof slope,
weather factors such as rainfall frequency, intensity and duration, and climate.
The USEPA (2009) identifies numerous techniques, known as stormwater
Best Management Practices (BMP), that are used to control and manage stormwater
runoff. The design and use of specific stormwater BMP’s is a function of site conditions
(i.e., topography, soil types, vegetative cover, building footprint size, overall site acreage,
etc.) and the need for treatment of water quality parameters. Stormwater BMP’s are
divided into two categories of control: structural and non-strucutral. Structural BMP’s
are management techniques that use engineered systems to control stormwater runoff.
While some of these techniques include built structures like retention and detention
ponds, many structural BMP’s use the natural processes of interception, infiltration, and
evaporation. Non-structural BMP’s align more with planning techniques. These are
decisions that are made early in the site design process such as reducing building
8

footprints, reducing parking lot sizes, planning the use of a green roof, etc. Green roofs
can be considered to be a structural and non-structural best management practice. They
are most effective when they are part of a wholistic site design approach where the
planning of the green roof can reduce the need for other stormwater BMP’s on the
ground. However, the actual green roof is an engineered system that is constructed on
the site; therefore it can be classified as a structural BMP also. As green roofs begin to
emerge as a viable stormwater BMP, their effectiveness as a control is based on the scale
(i.e., amount of area) at which green roofs are applied.
Using the Tanyard Branch watershed in Georgia as a case study, hydrologic
modeling suggests that green roofs alone cannot provide complete stromwater
management at the watershed scale (Carter, 2006). However, in scenarios like this, green
roofs can certainly help to complement other stormwater BMP’s. Also, in highly
developed watersheds where limited space constrains the ability to use
detention/retention ponds, green roofs are an effective strategy that uses the roof space
not only as part of the building envelope, but also as a space for stormwater detention.
While green roofs cannot function alone as a stormwater BMP at the watershed scale,
green roofs do have the potential to replicate portions of the predevelopment hydrograph
which may be lost after urbanization (Carter, 2006). By functioning to intercept and
evaporate rainfall before it reaches the ground, green roofs can re-establish that part of
the predevelopment hydrograph that slows water transfer to receiving surface water
bodies during a rain event, and thus, they reduce the potential for flooding and/or sewer
overflow conditions.

9

However, there has been minimal research completed which investigates if the
stormwater management benefits are realized when the green roof system is placed on a
steep slope. Getter (2007) reports that increasing slope decreases the stormwater
retention abilities of a green roof system. Her studies show that for overall rainfall a test
roof with a 2% slope retained 85.2% of rainfall while a test roof with a 25% slope
retained only 75.3% of rainfall. When rainfall was separated into light (<2.0mm),
medium (2.0-10.0mm) and heavy (>10.0mm) categories percent retention was 93.3%,
92.2% and 71.4%, respectively. Vanwoert (2005) suggests similar findings that roof
slope does influence the stormwater retention capabilities of green roof systems. He
reports that a test roof with 2% slope retained 70.7% of rainfall while a test roof with a
6.5% slope retained 65.9% of overall rainfall. When rainfall was separated into light
(<2.0mm), medium (2.0-6.0mm) and heavy (>6.0mm) categories percent retention with a
2% slope was 97.1%, 85.5% and 65.1%, respectively, while a 6.5% slope was 94.9%,
83.1% and 59.5%, respectively. The difference between the results of these two studies
could be attributed to the age of the green roof media. Getter’s study was taken from a
green roof that had been established for 3 years. She found mature substrate exhibited
greater values for porosity, free airspace, organic matter, and water holding capacity.
Due to the fact that the majority of building construction in urban areas utilizes sloped
roofs, it is critical to understand stormwater performance and how to best design steep
sloped green roof systems to optimize stormwater performance.
Other Ecosystem Services Provided by Green Roofs Throughout History.
Many people believe green roofs to be a part of the “green” movement associated
with today’s building and construction industry. However, green roofs date back to
10

ancient civilizations in the Middle East. Arguably, the most famous ancient (and
possibly mythical) green roof occurred in Mesopotamia and was known as the Hanging
Gardens of Babylon (700 B.C.). These roof gardens were purported to occupy four acres
of planted and irrigated vegetation and reached 300 feet above the Euphrates River
Valley. Green roofs in ancient times typically used indigenous materials to construct a
waterproof membrane and then placed surrounding soil and natural vegetation on the
roof. People of these ancient civilizations used “green roofs” as a climate regulatory
service to protect themselves from the extremes of temperatures found in desert
environments, where insulation against heat and cold was more important than water
management.
In Europe, almost every major western civilization adapted some form of the
green roof system seen in the Middle East. However, unlike Middle Eastern societies,
which used green roofs for climate regulation to protect themselves from the extreme
desert climate, early European green roofs provided more cultural services to society. In
some societies, roof gardens were meant to display wealth, sophistication, and power
(e.g., the Italians who constructed villas with extensive terracing and roof gardens in the
1500’s). In other cases, green roofs were used as an inexpensive, long-lived solution to
roofing for barn or home buildings (e.g., Northern European countries and Scandinavian
countries). Similar to the Middle East, these societies used green roofs to regulate the
climate and provide protection from the outdoor environment. In Norway, many of these
structures date back to the 16th century and still stand today. These latter roofs were
typically intensive, sod roofs with 6+ inches (15.2cm) of soil and a waterproof membrane
constructed of multi-layered birch bark. Sod removed from the building footprint often
11

was placed directly on the waterproof membrane (Figure 3). These roofs were
constructed in small towns and rural areas because they were cheap to build, used local
materials, and had adequate waterproofing and insulating properties. Because the
building construction during this time period typically was timber frame construction, the
heavy structural members could support the additional weight of the green roof plus any
moisture common to their temperate climates. Sod covered houses and farms in the
Great Plains of North America (which typically were homesteaded by Scandinavian
immigrants), suggest that the technique was transferred from the Old World to the New
World as late as the mid 1800’s (Osmundson, 1999).
The contemporary green roofs seen today are primarily used to alleviate
environmental problems, and restore ecosystem services lost by high density, urban
development. The modern green roof originated at the turn of the 20th century in
Germany, where vegetation was installed on roofs to mitigate the damaging effects of
solar radiation on the roof structure (Oberndorfer et al., 2007). These roofs helped
regulate climate change by reducing heat islands in urban areas and were typically
shallow, extensive green roofs that were inaccessible to foot traffic. This type of green
roof largely replaced the more intensive (deep) rooftop gardens that were used previously
because they have a reduced roof load. By the middle of the 20th century, progressive
thinking about environmental concerns in urban areas led to increased research in the use
of green roofs, mainly in Germany and Switzerland. In Germany, green roof technology
has been incorporated into public policy and technical guidelines have been developed as
early as 1982 by the Landscape, Research, Development and Construction Society (FLL,
1995). Because of this, green roofs have now become widely accepted, and they
12

constitute an estimated 14% of all new flat roofs in Germany (Haemmerle, 2002). As the
21st century approached, green roofs made their transition to North America, and research
focused more intensely on green roof performance. Organizations such as the Leadership
in Energy and Environmental Design (LEED) provided design guidelines for energy
efficient buildings and have helped to increase awareness and the use of green roof
technology in the United States.
It is likely that green roofs will continue to gain momentum in North America
because of other environmental, economic, and social benefits. Green Roofs for Healthy
Cities (GRHC) publishes an annual industry survey on the growth of the green roof
market. In 2011, they concluded that the green roof industry grew by a staggering 115%
compared to 28.5% growth recorded in 2010 in terms of square footage of green roof
installed. These numbers show a positive growth trend in the market and point to an
industry that has the potential to sustain itself in the future.
Other benefits of green roofs include their ability to increase the lifespan of roof
membranes (Getter and Rowe, 2006). The growing media and vegetation layer in a green
roof system protect the underlayment from solar exposure and radiation. The green roof
system also regulates the temperature of the membrane surface. The reduction in extreme
temperature variations help to extend roof membrane life by reducing the expansion and
contraction of membrane material which can lead to degradation. One study
demonstrated diurnal temperature fluctuations for a non-green roof to be 50°C (122° F),
while green roof diurnal temperature fluctuations were only 3°C (37.4°F) (Connelly,
2005). Peck et. al. (1999) estimated that temperature moderation can extend the
membrane life two to three times. This increased life span helps recover initial upfront
13

costs associated with green roofs and makes the life cycle costs of green roofs more
economically viable than the life cycle costs of more conventional roofing materials.
A second and third benefit of green roofs is energy conservation and the reduction
of the urban heat island effect, respectively (Getter and Rowe, 2006). Green roofs
provide shade and an extra insulation layer that help to make buildings more energy
efficient by increasing the R-value of the roofing system. Media depth, shade from plant
material, and transpiration can reduce solar energy gain by up to 90% compared to nonshaded buildings (Getter and Rowe, 2006). In addition to reducing surface temperatures
on the roof membrane, green roofs also reduce the ambient air temperatures surrounding
the building. This reduction in ambient air temperatures can help reduce the urban heat
island effect, a natural phenomenon where highly urbanized areas, due to impervious
structures, absorb solar incidence and act as a heat sink after solar incidence subsides.
Air temperatures above the building have been shown to be 30°C (86°F) lower when a
vegetated green roof is in place compared to a conventional roof (Wong et al., 2003),
resulting in up to 15% annual energy consumption savings. Since buildings consume
36% of total energy use and 65% total electricity consumption, green roof
implementation on a wide scale could significantly impact energy use in an area. Most of
the energy savings from green roofs will occur during the summer months because of
reduced electricity consumption from air conditioner usage (Kula, 2005). This is because
the insulation properties of media are greater when air space exists as opposed to when
the media is saturated – which typically occurs during the winter months. A University
of Michigan study compared the expected costs of a 23,000 square foot conventional roof
with the cost of the same size green roof. The study took into consideration all of the
14

benefits afforded by green roof technology such as stormwater management, increased
roof life, energy conservation, etc. to determine the life cycle cost comparison. The green
roof would cost $129,000 more to construct. However, over its lifetime, the green roof
would save about $200,000 with nearly two-thirds of the savings coming from reduced
energy needs for the building (Foster, 2011).
Practical Aspects of Green Roof Design on Ecosystem Services.
Green roofs are typically classified as intensive or extensive; however
increasingly the term semi-intensive is used to define a green roof with characteristics at
an intermediate level between intensive and extensive green roofs. The difference
between these two types of green roofs is primarily the depth of the soil media, plant
selection, accessibility and maintenance. Intensive green roofs are typically classified as
having greater than 6 inches (15.2cm) of media. This allows for the use of a wide-range
of plants, with deeper and more extensive root systems. Many plants traditionally found
in landscapes on the ground including ornamental grasses, trees, shrubs, and herbaceous
perennials are found in intensive green roofs. On flat roof environments, these roofs are
often designed to be rooftop gardens that function as a social space for users of the
building.
Extensive green roofs are classified as having less than 6 inches (15.2cm) of
growing media. These roofs often serve a specific function, such as microclimate control
or stormwater retention, and they generally are not designed to be accessible by the
public. Sometimes these gardens are not visible to the public. This type of green roof is
lighter in weight and is often used on existing buildings with low roof load capacities.
The shallow media depth restricts the species of plants grown on the roof. These plants
15

often include herbs, a limited number of grasses, mosses, and drought tolerant succulents
such as Sedum (Getter, 2006).
Green roofs can be designed to create wildlife habitat in urban areas where
vegetation and natural habitat have been destroyed due to building development.
Widespread application of green roofs in urban areas could establish “green” corridors to
help facilitate bird migration patterns. In northern Switzerland, nine orchid species and
other rare and endangered plant species exist on a green roof installed a century ago
(Brenneisen, 2004). In addition, many birds have been recorded utilizing green roofs in
Germany, Switzerland, and England (Brenneisen, 2003; Gedge, 2003). Green roofs that
can offer more complex landscape structure are likely to attract more bird and insect
species. Extensive green roofs that lack species diversity and landscape structure will
have a reduced capacity to support bird and insect communities. For building owners
interested in recreating lost habitat on green roofs, reputable ecologists often can assist
designers in creating green roof systems with appropriate plant selection, soil moisture
conditions, and habitat structures to encourage birds and other wildlife.
Green roofs also have the ability to improve air quality by filtering air-borne
pollutants and reducing ambient air temperatures. Nearly one-quarter of the people in the
U.S., live in communities where unhealthy short term levels of particle pollution exist,
and roughly one in ten people live where there are unhealthy levels year-round (Rowe,
2010). It is well known that plants can remove air pollution by taking up gaseous
pollutants through their stomates, intercept particulate matter with their leaves, and break
down organic compounds in their plant roots (Baker, 1989). Therefore, the addition of

16

green roof plants in an urban ecosystem can improve air quality by introducing new
vegetation to areas that typically had no value in terms of ecosystem services.
Finally, green roofs can provide social benefits in terms of improved aesthetics.
Intensive green roofs are often designed to be “rooftop gardens” where building
occupants have the access to additional space for socializing. Addition of rooftop
gardens can increase property values for building owners and in turn allow them to
charge more for rent. When humans view green plants and nature, beneficial health
effects, such as reducing stress, lowering blood pressure, releasing muscle tension, and
increasing positive feelings (Ulrich, 1986), have been shown to occur. This has led to
many hospitals installing green roofs to provide their patients with more pleasant visual
surroundings.
HYPOTHESES
This study involves a field experiment calling for a comparison between
stormwater flow emitting from conventional roofing materials (ie., steel roofing or
fiberglass shingles) and three green roof treatments (ie., sedum, native grass, and bare
soil). The same slope marks all five roof treatments.
Null Hypothesis 1:
There is no relationship between roof treatment and the percent rainwater retained
on a standard sloped roof of 33%.
Hypothesis 1a:
There is a significant (p ≥ 0.05) relationship between conventional and green roof
treatments and percent rainwater retained on a standard sloped roof of 33%, with

17

conventional roofing materials retaining significantly less rainwater than green
roof or bare soil roofing surfaces.
Hypothesis 1b:
There is a significant (p ≥ 0.05) relationship between green roof treatments and
percent rainwater retained on a standard sloped roof of 33%, with the grass
roofing treatment retaining significantly more rainwater on a sloped roof than
sedum roofing treatment.
Hypothesis 1c:
There is a significant (p ≥ 0.05) relationship between green roof treatments and
percent rainwater retained on a standard sloped roof of 33%, with the grass
roofing treatment retaining significantly more rainwater on a sloped roof than the
bare soil roofing treatment.
Null Hypothesis 2:
There is no significant (p ≥ 0.05) relationship between conventional roof
treatments (i.e., steel or fiberglass shingle) and percent rainwater retained on a
standard sloped roof of 33%.
Hypothesis 2a:
There is a significant (p ≥ 0.05) relationship between conventional roof treatments
(i.e., steel or fiberglass shingle) and percent rainwater retained on a standard
sloped roof of 33%., with the fiberglass shingle roofing treatments retaining
significantly more rainwater on a sloped roof than the steel roofing treatment.

18

MATERIALS AND METHODS
Site Description. The study was conducted at the Michigan State University,
Landscape Architecture Alumni Research Site on the Old Mission Peninsula, Grand
Traverse County, MI. The site is located approximately 14.5 kilometers (9.0 miles) north
of Traverse City on a cherry farm, in an open field adjacent to several barn structures and
a chestnut orchard (Figure 4). The climate of the site is influenced by the fact that it is
surrounded on two sides by East and West Grand Traverse Bay. Consequently, the area
experiences cool springs, mild summers, warm falls and high snowfall winters. The
weather patterns in turn create sudden and large amounts of precipitation during the
seasonally active periods. Weather data was collected on-site by a weather station that
monitored precipitation, wind, and solar incidence. Measurements were complimented
by another weather station located approximately 8.0 kilometers (5 miles) north of the
study site on the Old Mission Peninsula; this station also is run by Michigan State
University.
Roof Testing Platforms. Five sloped green roof study platforms with dimensions
of 4.0 ft x 8.0 ft (1.22 m x 2.44 m) were constructed to replicate what could be considered
a typical sloped (4:12 pitch) roof on a single family home in Michigan. The platforms
were constructed by MSU Environmental Design graduate students at the site in Traverse
City, MI. Roof trusses were built with conventional 2” x 4” (5.0cm x 10.1cm) boards
mimicking typical roof construction found on homes in Michigan due to the heavy
snowfall recorded during the winter months. Roof decking was constructed out of 4’ x 8’
(1.22m x 2.44m) sheets of marine plywood and fastened to the roof trusses. Each
platform was framed and then partitioned into three equal sections using 2” x 6” (5.0cm x
19

15.2cm) cypress boards. Each 4’x8’ (1.22m x 2.44m) sheet of marine plywood was
partitioned into 3 zones with dimensions of 2.5 ft x 4.0 ft (0.76 m x 1.22 m) for a total
surface area of 10.0 ft² (0.93 m²)/partition zone that drained separately from one another.
Each partition zone was lined with a 0.045mm EPDM rubber membrane (Figure 5). The
roof platforms were built on a post structure to a height of 0.91 meters (3 ft.), which
allowed room for monitoring equipment to be installed under the drains of each partition.
The aspect of the study plots was oriented due north to minimize the negative effects of
solar incidence.
Drainage System and Water Retention. A 2.54 cm (1 in) drain was cut out of the
bottom of each individual partition to allow it to drain separately. Traditional plastic
gutters and end caps were custom fit to the opening in each partition, and each directed
stormwater runoff into a downspout that ran directly into a tipping bucket (Figure 6). On
top of the liner in each roof partition that was to contain green roof media, a 0.75 cm
(0.26 in) water retention fabric (Xeroflor XF158) was placed. The water retention fabric
was placed to cover the outlet drains so it functioned as a water filter as well. No formal
drainage layer was used at the base of the partitions containing a green roof system
treatment; this was done to retain as much moisture in the substrate as possible.
Substrate Type, Vegetation Type and Roofing Materials. Nine partitions were set
aside to contain the green roof system. These were filled with 15.2 cm (6”) of an
engineered substrate mix containing 80% heat-expanded slate, 15% sand, and 5% organic
matter to the specifications listed in Rowe et al. (2006). One set of three partitions
contained only engineered substrate as described above. Two different types of green
20

roof vegetation were planted in each set of remaining green roof system partitions:
Vegetation consisted of either sedum species or native grass species. Five species of
sedum were planted, including S. kamsatchatkum, S. album, S. reflexum, S. acre, and S.
ellacombianum. Plants were cultivated using cuttings supplied by Hortech, Inc. (Spring
Lake, MI) and applied at a rate of 0.9 kg (2 lb) per square meter. The sedum partitions
had approximately 90% plant coverage with abundant growth of S. kamsatchatkum on the
bottom of the partitions (Figure 7). The Michigan native grasses included Buchloe
dactyloides and Bouteloua gracilis. These plants were planted from 7.62cm (3”) plugs
supplied by Nature Hills Nursery (Omaha, NE) and planted on 10.16 cm (4”) centers in a
randomized pattern. Native grass partitions had approximately 95% plant coverage and
also displayed abundant plant growth on the bottom of the partitions; neither native grass
species dominated the other (Figure 7). Plants were irrigated twice a day for the first
three weeks to encourage root establishment. No further irrigation was used after the
establishment period, and no fertilizers were applied. The sedum and grass partitions had
90% and 95% coverage, respectively, when data collection began immediately after the
establishment period. Therefore, nine partitions containing 3 replicates of bare media,
bare media plus sedum species or bare media plus native grasses, were compared for
rainwater retention, respectively.
Two different conventional roofing materials were used in the remaining
partitions with 3 partitions in a set containing three-dimensional (30 year) fiberglass
shingles, respectively, and three replicates in a set containing galvanized steel roofing.
The conventional roof materials were supplied by Ace Roofing (Traverse City, MI) and

21

were used to represent typical roofing materials found on homes in the Midwest (Figure
8).
Treatments. Fifteen partitions and a total of 5 treatments (3 partitions/treatment)
were tested during the study. These included conventional steel roofing, conventional
three dimensional (30 year life) fiberglass/asphalt shingles, engineered soil media only,
engineered soil media plus native grasses, and engineered soil media plus sedum. The
treatments were arranged in a stratified design with the conventional roofing treatments
occupying two platforms in an alternate pattern, and each of the three green roof
treatments found on three platforms in a rotated manner (Figure 9). The objective of the
study was to quantify the difference in stormwater retention between the 5 different
roofing treatments as discussed above.
Data Collection. Rainfall and runoff were recorded on a CR-1000 datalogger
(Campbell Scientific Inc., 2009) that was placed along with two AM16T multiplexers and
one SDM-SW8A switch enclosure. A review of National Oceanic and Atmospheric
Administration (NOAA) annual precipitation records suggested that high intensity rain
events in this part of Michigan occurred frequently, so each partition area was fitted with
a TB-4 tipping bucket rain gauge (Campbell Scientific Inc., 2009). These buckets were
placed under each partition and runoff was collected directly from the downspouts. A
sixteenth tipping bucket was located adjacent to the weather station on the study site as a
control to collect rainfall. The fifteen tipping buckets were covered with 25.4cm (10”)
round plastic plant saucer that contained a hole that was cut to fit the size of the
downspout draining the roof partitions. Accuracy of the rain gages, as reported by the
22

manufacturer, are ±1%, +0 and -2.5%, and +0 and -3.5% for rainfalls of <25.4 mm•h-1,
25.4 to 50.8 mm•h-1, and 50.8 to 76.2 mm•h-1 (Campbell Scientific Inc., 2009).
Data was recorded beginning in April 2010 for a period of two years with the
likelihood of snow events approaching zero. The data in this study represents that part of
the year when precipitation occurred as rainfall (April 1, 2010, until October 31, 2011).
The datalogger was programmed to collect data values every minute and total them every
5 minutes, 24 hours a day over the study period.
Data Analysis. The data logger recorded data from each tipping bucket,
respectively. This data was then subtracted from the total rain fall recorded for each rain
event at the control tipping bucket (#16). The difference in the two data recordings was
the “retention data” for that particular partition. Retention data were analyzed from all
rain events that occurred during temperatures above 0°C (32°F) as a percentage of total
rainfall for each rain event. Independent rain events were defined as precipitation events
that were separated by six or more hours. In the event runoff was still occurring six hours
after the initial rainfall event, the two events were combined. A review of annual NOAA
rain events suggests that rain events in this part of Michigan could be categorized as light
(< 5mm), medium (5 - 14 mm), or heavy (>14 mm); this was an arbitrary categorization
set by the author to facilitate data analysis.
Data were analyzed as mean percent retention per rain event using an ANOVA
model with roof treatment and rainfall category as independent variables. Significant
differences between treatments were determined using multiple comparisons with TukeyKramer adjustments (PROC MIXED, SAS version 9.2, SAS Institute, Cary, NC).

23

RESULTS
During the study (April 1, 2010 – October 31, 2011), there was a total of 63
measured rain events (>0 mm) recorded (Figure 10). Precipitation totals ranged from
0.76 mm to 66.29 mm for individual rain events. A histogram of measured rain events
used in the study shows the distribution of rainfall (Figure 11). Of the 63 measured rain
events, there were 25 light (<5mm), 21 medium (5 – 14 mm), and 17 large (>17 mm) rain
events. Daily low temperatures ranged from -18.2°C to 23°C and daily high temperatures
ranged from -12.2°C to 34.2°C (Figure 12).
The ANOVA model showed rain category and roof treatment, as well as the
interaction of both, to be significant (Table 1). Representative hydrographs (Figure 13)
and cumulative hydrographs (Figure 14) from a selected rain event within each rainfall
category illustrate the effect of roof treatment on percent retention as well as the overall
delay of runoff.
During a selected light rain event (3.56mm) on June 8, 2011, average percent
retention was 18.4%, 11.4%, 100.0%, 100.0%, 100.0% for the fiberglass asphalt shingle,
steel, engineered substrate only, engineered substrate plus sedum and engineered
substrate plus grass treatments, respectively. The start of runoff for the fiberglass asphalt
shingle roof treatments and the steel roof treatments occurred almost instantaneously
after the rainfall started. In contrast to this, the engineered substrate only, engineered
substrate plus sedum, and engineered substrate plus grass treatments. All retained 100%
of rainfall and no runoff occurred during the rain event. Average peak flow volumes
during a five minute interval for the fiberglass asphalt shingles and steel roof treatments
were 0.83 mm and 0.89 mm, respectively. There were no peak flow measurements for
24

the engineered substrate only, engineered substrate plus sedum, and engineered substrate
plus grass because no runoff occurred.
During a selected medium rain event (8.38mm) on August 14, 2010, average
percent retention was 16.0%, 11.4%, 42.0%, 65.0%, 66.8% for the fiberglass asphalt
shingle, steel, engineered substrate only, engineered substrate plus sedum, and engineered
substrate plus grass treatments, respectively. The start of runoff for the fiberglass asphalt
shingle roof treatments and the steel roof treatments occurred almost instantaneously
after the rainfall started. The engineered substrate only, engineered substrate plus sedum,
and engineered substrate plus grass treatments delayed the start of runoff for 10 minutes
after the initial rainfall. However, runoff was spread out over time for all three green roof
treatments. Average peak flow volumes within a five minute interval were 2.27 mm,
2.60 mm, 0.29 mm, 0.14 mm and 0.10 mm for the fiberglass asphalt shingle, steel,
engineered substrate only, engineered substrate plus sedum, and engineered substrate plus
grass treatments, respectively.
During a selected heavy rain event (20.83 mm) on June 11, 2011, average percent
retention was 3.6%, 2.2%, 18.0%, 29.2%, 34.3% for the fiberglass asphalt shingle, steel,
engineered substrate only, engineered substrate plus sedum, and engineered substrate plus
grass treatments, respectively. The start of runoff for the fiberglass asphalt shingle roof
treatments and the steel roof treatments occurred almost instantaneously after the rainfall
started. The engineered substrate only, engineered substrate plus sedum, and engineered
substrate plus grass treatments delayed the start of runoff for 10 minutes after the initial
rainfall. However, runoff was spread out over time for all three green roof treatments.
Average peak flow volumes within a five minute interval were 2.20 mm, 2.02 mm, 1.11
25

mm, 0.97 mm and 0.69 m for the fiberglass asphalt shingle, steel, engineered substrate
only, engineered substrate plus sedum, and engineered substrate plus grass treatments,
respectively.
These representative results concur with early findings of Getter (2006) and
Vanwoert (2004) from their respective sloped green roof research projects. Getter
concluded that there was minimal delay in runoff from the vegetated roof platforms
tested. Vanwoert concluded that there was a delay of runoff, usually less than an hour.
These results are concurrent because there was a minimal (approximately 10 minute)
delay in initial runoff from the green roof test platforms during this study. However,
some of the other findings from these two studies contradict some of the results of this
study which show that runoff was eliminated completely for some light rain events. It is
likely that the intensity and frequency of the rainfalls, when coupled with antecedent soil
moisture conditions in the partitions could explain the difference in findings. Also, the
green roof system design could be affecting the stormwater retention performance. In
this study, 15.2cm (6”) of engineered substrate was placed on top of a water retention
fleece to maximize stormwater retention; in the earlier studies, a thinner engineered
substrate was used.
Runoff was spread out over time for all green roof treatments. For the engineered
substrate only treatment there was no runoff recorded for the selected, light rainfall event
(June 8, 2011). However, the final runoff was recorded 18 hours 5 minutes and 11 hours
25 minutes for selected medium (August 14, 2010) and heavy (June 11, 2011) rainfall
events, respectively. For the engineered substrate plus sedum treatment there was no
runoff recorded for the selected, light rainfall event. However, the final runoff was
26

recorded 10 hours 35 minutes and 11 hours 20 minutes for selected medium (August 14,
2010) and heavy (June 11, 2011) rainfall events, respectively. For the engineered
substrate plus grass treatment there was no runoff recorded for the light rainfall category.
However, the final runoff was recorded 18 hours 5 minutes and 12 hours 45 minutes for
selected medium and heavy rainfall events, respectively. For the fiberglass asphalt
shingle treatment, final runoff stopped shortly after the rainfall ended for light, medium
and, heavy rainfall events. For the steel roofing treatment, final runoff stopped shortly
after the rainfall ended for light, medium, and heavy rainfall events.
Over the two year study period; there was 701.54 mm of cumulative rainfall from
the 63 measured rainfall events. The fiberglass asphalt shingle roof treatment retained
99.18 mm (14.1%), the steel roof treatment retained 68.72 mm (9.8%), the engineered
substrate only treatment retained 179.33 mm (25.6%), the engineered substrate plus
sedum roof treatment retained 291.80 mm (41.6%), and the engineered substrate plus
grass roof treatment retained 281.40 mm (40.5%).
When total rainfall from all light rain events was combined (66.04 mm), the
engineered substrate plus grass roof treatment retained the highest percentage of rainfall
(94.0%), while the engineered substrate plus sedum roof treatment retained the next
highest amount (93.1%). The engineered substrate only retained 82.5%; the fiberglass
asphalt shingle roof treatment retained 17.6%; and the steel roof treatment retained 9.8%.
When total rainfall from all medium rain events was combined (189.74 mm), the
engineered substrate plus sedum roof treatment retained the highest percentage of rainfall
(70.5%), while the engineered substrate plus grass roof treatment retained the next

27

highest amount (67.4%); the engineered substrate only retained 47.0%; the fiberglass
asphalt shingle roof treatment retained 11.7%; and the steel roof treatment retained 8.0%.
When total rainfall from all heavy rain events was combined (445.77 mm), the
engineered substrate plus grass roof treatment retained the highest percentage of rainfall
(29.1%), while the engineered soil media plus sedum roof treatment retained the next
highest amount (28.3%). The engineered substrate only retained 12.7%; the shingle roof
treatment retained 13.8%; and the steel roof treatment retained 9.9% (Table 2).
When rainfall was separated into distinct rain events and retention percentages
from each rain event were averaged together, all means were different with retention
percentages of 14.6%, 9.2%, 51.8%, 68.1% and 67.6% for the fiberglass asphalt shingles,
steel, engineered substrate only, engineered substrate plus sedum, and engineered
substrate plus grass treatments, respectively. However, when the rain events were
categorized into light, medium and heavy rain events, the results showed that not all
means were different. For light rain events the engineered substrate plus sedum and
engineered substrate plus grass treatments were not significantly different from each
other. The engineered substrate only treatment was significantly different from the
engineered substrate plus grass treatment, but not the engineered substrate plus sedum
treatment. The steel and fiberglass asphalt shingle treatments were significantly different
from all green roof treatments (Table 3), but not significantly different from each other.
For medium rain events the engineered soil media plus sedum and engineered soil media
plus grass treatments were not significantly different from each other, but they were
different from the engineered soil media only, fiberglass asphalt shingle and steel roof
treatments. Engineered soil media only was significantly different from all other
28

treatments. Steel and shingle treatments were not significantly different from each other,
but were different from all other treatments (Table 3). For heavy rain events, the
engineered substrate plus sedum and engineered substrate plus grass treatments were not
significantly different, but were different from all other treatments. The engineered
substrate only, fiberglass asphalt shingle and steel roof treatments were not significantly
different from each other, but they were different from the engineered substrate plus
sedum and engineered substrate plus grass (Table 3). The lowest retention percentage for
all treatments occurred during heavy rain events where 13.8%, 9.9%, 12.7%, 28.3% and
29.1% was retained for the fiberglass asphalt shingle, steel, engineered substrate only,
engineered substrate plus sedum and engineered substrate plus grass, respectively. The
highest retention percentage for all treatments occurred during light rain events where
17.6%, 9.8%, 82.5%, 93.1% and 94.0% was retained for the fiberglass asphalt shingle,
steel, engineered substrate only, engineered substrate plus sedum and engineered
substrate plus grass, respectively. All green roof treatments retained 100% of rainfall
from a rain event on several occasions. This occurred 2, 5 and 6 times on the engineered
substrate only, engineered substrate plus sedum and engineered substrate plus grass
treatments, respectively. The heaviest rainfall in which 100% retention was achieved was
3.56 mm by the all three green roof treatments
DISCUSSION
This study was designed to quantify differences between conventional roofing
material and vegetated roofs, and between different plant coverages on a green roof
system. Originally, it was assumed that the conventional roofing materials, steel and
shingle roofing, would yield considerably more runoff than the bare engineered soil
29

media and vegetated roofing. However, it was unclear what different plant species would
do in terms of stormwater retention and delayed peak flow phenomena, as this had not
been studied previously.
The original hypotheses for this study were stated as follows:
Null Hypothesis 1 (Ho1):
There is no relationship between roof treatment and the percent rainwater retained
on a standard sloped roof of 33%. Findings: Reject
Hypothesis 1a:
There is a significant (p ≥ 0.05) relationship between conventional and green roof
treatments and percent rainwater retained on a standard sloped roof of 33%, with
conventional roofing materials retaining significantly less rainwater than green
roof or bare soil roofing surfaces. Findings: Accept
Hypothesis 1b:
There is a significant (p ≥ 0.05) relationship between green roof treatments and
percent rainwater retained on a standard sloped roof of 33%, with the grass
roofing treatment retaining significantly more rainwater on a sloped roof than
sedum roofing treatment. Findings: Reject
Hypothesis 1c:
There is a significant (p ≥ 0.05) relationship between green roof treatments and
percent rainwater retained on a standard sloped roof of 33%, with the grass
roofing treatment retaining significantly more rainwater on a sloped roof than the
bare soil roofing treatment. Findings: Accept
Null Hypothesis 2 (No2):
30

There is no significant (p ≥ 0.05) relationship between conventional roof
treatments (i.e., steel or fiberglass shingle) and percent rainwater retained on a
standard sloped roof of 33%. Findings: Reject
Hypothesis 2a:
There is a significant (p ≥ 0.05) relationship between conventional roof treatments (i.e.,
steel or fiberglass shingle) and percent rainwater retained on a standard sloped roof of
33%., with the fiberglass shingle roofing treatments retaining significantly more
rainwater on a sloped roof than the steel roofing treatment. Findings: Accept
Based on the results of this study, I reject my null hypothesis Ho1 and Ho2, and I
accept my testable hypotheses H1a, H1c, and H2 that there would be significant
differences in stormwater retention capabilities between conventional roof treatments and
green roof treatments and within conventional and green roof treatments. The data
supports these hypotheses across all rainfall categories by showing statistically significant
differences in percent retention. Also, I reject my testable hypothesis H1b which states
that the grass treatments would retain significantly more rainwater than the sedum
treatments. There were no statistically significant differences between sedum and grass
treatments across all rainfall categories. However, the grass treatments did have higher
means in the light and heavy rainfall categories, but the differences were not significant.
Furthermore, I accept my testable hypothesis which states that the grass treatments would
retain significantly more rainwater than the bare soil roofing treatments. The data
supports this hypothesis across all rainfall categories by showing statistically significant
differences in percent retention. Finally, there were significant differences between the
sedum/grass and media only treatments in the medium and heavy rainfall categories.
31

This demonstrates that within certain rainfall categories, there is a significant difference
between the vegetated green roof systems and the media only system. This contradicts
earlier findings of Vanwoert et. al. (2005) who found that vegetation has a minimal effect
on stormwater retention. However, the data did not show significant differences between
sedum and native grasses across all rainfall categories although the grass partitions had
slightly higher averages for percent retention during light and heavy rain events. This
could be attributed to several factors within this study. The native grasses were planted
as plugs in their first growing season (2010) and the plants may not have been fully
established in the study plots. Perhaps, after a full growing season the root systems had
become more developed and therefore use more of the rainwater that enters the soil,
showing significantly greater retention. Also, as the grasses become larger and cover
more surface area in the study plots; they could intercept more rainfall and trap it on the
surface where it would be evaporated back into the atmosphere.
The green roof treatments delayed peak flows and reduced peak flow volumes
when compared to the conventional roof treatments. This has important implications for
residential areas that experience problems with flooding and sewer overflows. This study
implies that sloped green roofs could be considered a stormwater “best management
practice” by attenuating stormwater runoff which can reduce flooding by not
overwhelming municipal sewer systems.
Ultimately, this study provides baseline stormwater retention data that proves the
ability of green roofs to retain rainwater on steep slopes. The findings in this study show
that sloped green roofs retain less stormwater compared other flat green roof studies.
Although, sloped green roofs may not retain as much water as flat green roofs they are
32

still a viable option for stormwater management in urban areas. There is a significant
difference in amount of stormwater runoff when green roofs are compared to
conventional roofing materials on a steep slope. Perhaps the most profound result of this
study is the ability of green roofs on steep slopes to manage heavy rainfall events. Both
sedum and grass partitions retained approximately 30% of the rainfall from various
events and delayed runoff by at least several hours. This data will be useful in modeling
the potential of green roofs to manage stormwater when applied to different percentages
of roof structures in urban areas, based on housing style and roof configurations, and it
lends support to green roof application as a best management practice in the construction
of residential structures.
Steep slope green roofs provide new opportunities for stormwater management,
especially in residential areas. There are difficulties associated with growing green roofs
on steep slopes. Specific concerns must be addressed relative to roof exposure, solar
incidence, moisture retention, erosion control/slumping, and micro-climate management
to ensure the vitality of steep sloped green roofs. If these concerns are properly
addressed during the design and installation of green roof systems, then green roofs will
become a viable option on steep sloped structures and an effective stormwater
management tool in urban areas.

33

APPENDIX

34

Table 1.

Degrees
Source of
of
Sum of
Mean
FPVariation
Freedom Squares Squares Statistic Value
14 341031.5 24359.4
96.5 <.0001
Model
166.1 <.0001
2 83865.1 41932.6
Rain Category_z
169.6 <.0001
4 171194.6 42798.7
Roof Treatment_y
25.7 <.0001
8 51900.0
6487.5
Category*Treatment
300 75720.8
252.4
Error
314 416752.3
Corrected Total
zRoof surface treatments were sedum, grass, media, steel, shingle.
yRain event categories were light (<5.0 mm) (n=25), medium (5.0-14.0
mm)
(n=21), and heavy (>14.0 mm) (n=17), and overall (n=63).

ANOVA table for rainfall retention over 2 growing season (1 May 2010 to 31 October
2011) from five roof platform treatments replicated three times. Retention is the
dependent variable. Roof treatment and rain category are independent variables.

35

Table 2.

Light Rainfall (0-5mm)
Media Sedum Grass
82.5% 93.1%
94.0%
Medium Rainfall (5-14mm)
Media Sedum Grass
47.0% 70.5%
67.4%
Heavy Rainfall (>14mm)
Media Sedum Grass
12.7% 28.3%
29.1%

Steel
9.8%

Shingle
17.6%

Steel
8.0%

Shingle
11.7%

Steel
9.9%

Shingle
13.8%

Average percent retention, organized by rainfall category, over 2 growing seasons (1 May
2010 to 31 October 2011) from 5 roof treatments replicated 3 times. A total of 63
measured rain events are included with 25 light (<5mm), 21 medium (5 – 14 mm), and 17
large (>14 mm) rain events respectively.

36

Table 3.

Means with the same letter are
not significantly different
Treatment

Light

Medium

Large

Grass

94.0 A

67.4 A

29.1 A

Sedum

93.1 AB

70.5 A

28.3 A

Substrate Only

82.5 B

47.0 B

13.8 B

Shingle

17.6 C

11.7 C

12.7 B

Steel

9.8

8.0

9.8

C

C

B

N = 25, 21, and 17 for light, medium, and heavy rainfall events,
respectively.

Tukey’s Studentized Range (HSD) Test for percent retention for light, medium, and large
rainfall categories over 2 growing seasons (1 May 2010 to 31 October 2011) from five
roof treatments replicated three times.

37

Table 4.

Date/Time rainfall
4/3/2010 10:00
0
4/3/2010 11:00
0
4/3/2010 12:00
0
4/3/2010 13:00
0
4/3/2010 14:00
0
4/3/2010 15:00
3.302
4/3/2010 16:00
1.778
4/3/2010 17:00
0.762
4/3/2010 18:00
0
4/3/2010 19:00
0
4/3/2010 20:00
0
4/3/2010 21:00
0
4/3/2010 22:00
0
4/3/2010 23:00
0
5.842
Totals (mm)

media
(1)
0.000
0.000
0.000
0.000
0.000
0.245
0.299
0.149
0.000
0.000
0.000
0.000
0.000
0.000
0.694

media
(2)
0.000
0.000
0.000
0.000
0.000
0.117
0.181
0.085
0.000
0.000
0.000
0.000
0.000
0.000
0.384

media
(3)
0.000
0.000
0.000
0.000
0.000
0.192
0.309
0.171
0.011
0.011
0.011
0.000
0.000
0.000
0.704

sedum
(1)
0.000
0.000
0.000
0.000
0.000
0.192
0.288
0.149
0.021
0.000
0.000
0.000
0.000
0.000
0.651

sedum
(2)
0.000
0.000
0.000
0.000
0.000
0.192
0.224
0.096
0.011
0.000
0.000
0.000
0.000
0.000
0.523

sedum
(3)
0.000
0.000
0.000
0.000
0.000
0.000
0.064
0.021
0.011
0.000
0.000
0.000
0.000
0.000
0.096

grass
(1)
0.000
0.000
0.000
0.000
0.000
0.064
0.139
0.075
0.011
0.011
0.032
0.021
0.011
0.000
0.363

Data from rain event on 4/3/2010.

38

grass
(2)
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.032
0.032
0.032
0.032
0.032
0.021
0.021
0.213

grass
(3)
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000

steel
(1)
0.000
0.000
0.000
0.000
0.000
2.796
1.739
0.662
0.011
0.000
0.000
0.000
0.000
0.000
5.207

steel
(2)
0.000
0.000
0.000
0.000
0.000
2.668
1.622
0.640
0.000
0.000
0.000
0.000
0.000
0.000
4.930

steel
(3)
0.000
0.000
0.000
0.000
0.000
3.020
1.825
0.726
0.011
0.000
0.000
0.000
0.000
0.000
5.580

shingle
(1)
0.000
0.000
0.000
0.000
0.000
2.796
1.889
0.822
0.000
0.011
0.000
0.000
0.000
0.000
5.516

shingle
(2)
0.000
0.000
0.000
0.000
0.000
2.678
1.675
0.683
0.011
0.000
0.000
0.000
0.000
0.000
5.047

shingle
(3)
0.000
0.000
0.000
0.000
0.000
2.646
1.718
0.726
0.011
0.011
0.000
0.000
0.000
0.000
5.111

Table 5.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
4/25/2010 1:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
4/25/2010 2:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
4/25/2010 3:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
4/25/2010 4:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
4/25/2010 5:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
4/25/2010 6:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.011 0.000 0.000 0.000
0.000
0.000
0.000
4/25/2010 7:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.021 0.032 0.053
0.000
0.000
0.000
4/25/2010 8:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.011 0.011 0.000
0.000
0.000
0.000
4/25/2010 9:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
4/25/2010 10:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
4/25/2010 11:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
4/25/2010 12:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.363 0.331 0.395
0.213
0.224
0.224
4/25/2010 13:00
2.286
0.043
0.032
0.011
0.032
0.021
0.021 0.011
0.000
0.000 1.974 1.835 2.081
2.027
2.017
1.889
4/25/2010 14:00
1.27
0.032
0.032
0.032
0.043
0.021
0.021 0.096
0.000
0.128 1.163 1.131 1.248
1.195
1.174
1.056
4/25/2010 15:00
0.762
0.032
0.053
0.288
0.021
0.021
0.021 0.320
0.000
0.363 0.832 0.790 0.843
0.822
0.822
0.768
4/25/2010 16:00
0.254
0.469
0.405
0.523
0.000
0.000
0.011 0.309
0.000
0.341 0.181 0.160 0.171
0.181
0.203
0.171
4/25/2010 17:00
0
0.309
0.213
0.267
0.000
0.000
0.000 0.181
0.000
0.203 0.011 0.000 0.000
0.000
0.000
0.000
4/25/2010 18:00
0
0.149
0.075
0.128
0.000
0.000
0.000 0.107
0.000
0.107 0.000 0.000 0.000
0.000
0.011
0.000
4/25/2010 19:00
0
0.075
0.021
0.043
0.000
0.000
0.000 0.064
0.000
0.043 0.000 0.000 0.000
0.000
0.000
0.000
4/25/2010 20:00
0
0.032
0.000
0.011
0.000
0.000
0.000 0.011
0.000
0.011 0.000 0.000 0.011
0.000
0.000
0.000
4/25/2010 21:00
0
0.000
0.000
0.011
0.000
0.000
0.000 0.011
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
4/25/2010 22:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
4/25/2010 23:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
5.080
1.142
0.832
1.312
0.096
0.064
0.075 1.110
0.000
1.206 4.556 4.289 4.802
4.439
4.449
4.108
Totals (mm)

Data from rain event on 4/25/2010.

39

Table 6.

Date/Time rainfall
4/30/2010 21:00
0
4/30/2010 22:00
0
4/30/2010 23:00
0.508
5/1/2010 0:00
9.14
5/1/2010 1:00
4.318
5/1/2010 2:00
0.254
5/1/2010 3:00
0
5/1/2010 4:00
0
5/1/2010 5:00
0
5/1/2010 6:00
0
5/1/2010 7:00
0
5/1/2010 8:00
0
5/1/2010 9:00
0
5/1/2010 10:00
0
5/1/2010 11:00
0
5/1/2010 12:00
0
Totals (mm) 14.220

media
(1)
0.000
0.000
0.000
1.515
3.564
1.366
0.672
0.384
0.256
0.181
0.128
0.096
0.064
0.043
0.021
0.000
8.291

media
(2)
0.000
0.000
0.000
1.771
3.062
1.366
0.683
0.405
0.277
0.203
0.160
0.117
0.096
0.064
0.043
0.011
8.259

media
(3)
0.000
0.000
0.000
2.049
3.340
1.291
0.694
0.427
0.267
0.213
0.149
0.117
0.085
0.064
0.032
0.011
8.739

sedum
(1)
0.000
0.000
0.000
0.064
1.665
1.195
0.640
0.384
0.256
0.181
0.128
0.096
0.075
0.053
0.032
0.000
4.769

sedum
(2)
0.000
0.000
0.000
0.053
1.312
1.227
0.651
0.373
0.224
0.160
0.107
0.075
0.064
0.043
0.043
0.021
4.353

sedum
(3)
0.000
0.000
0.000
0.075
2.049
1.227
0.662
0.416
0.267
0.181
0.139
0.107
0.085
0.064
0.032
0.011
5.314

grass
(1)
0.000
0.000
0.000
0.000
1.494
1.408
0.886
0.608
0.448
0.352
0.267
0.224
0.181
0.139
0.096
0.043
6.146

Data from rain event on 4/30/2010.

40

grass
(2)
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000

grass
steel
steel
steel
(3)
(1)
(2)
(3)
0.000 0.000 0.000 0.000
0.000 0.000 0.000 0.000
0.000 0.619 0.630 0.694
0.000 7.650 7.245 7.736
1.718 3.393 3.254 3.564
1.003 0.373 0.341 0.395
0.662 0.021 0.011 0.021
0.459 0.011 0.011 0.000
0.341 0.000 0.000 0.000
0.277 0.000 0.000 0.000
0.213 0.000 0.000 0.000
0.171 0.000 0.000 0.011
0.149 0.000 0.000 0.000
0.117 0.011 0.000 0.000
0.075 0.000 0.000 0.000
0.032 0.000 0.000 0.000
5.218 12.078 11.492 12.420

shingle
(1)
0.000
0.000
0.501
7.522
3.244
0.309
0.021
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
11.598

shingle
(2)
0.000
0.000
0.555
7.117
3.116
0.341
0.011
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
11.150

shingle
(3)
0.000
0.000
0.512
7.714
3.265
0.373
0.021
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
11.897

Table 7.

Date/Time rainfall
5/2/2010 6:00
0
5/2/2010 7:00
0
5/2/2010 8:00
0.254
5/2/2010 9:00
0.762
5/2/2010 10:00
0
5/2/2010 11:00
0
5/2/2010 12:00
0
1.016
Totals (mm)

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.267 0.299 0.331
0.160
0.181
0.181
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.576 0.544 0.576
0.512
0.544
0.523
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.011
0.011
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.011 0.000 0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.854 0.843 0.907
0.672
0.736
0.715

Data from rain event on 5/2/2010.

41

Table 8.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
5/4/2010 6:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
5/4/2010 7:00
1.016
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 1.035 1.056 1.120
1.003
0.864
0.939
5/4/2010 8:00
0.508
0.000
0.011
0.000
0.011
0.000
0.000 0.000 0.000 0.000 0.427 0.363 0.395
0.437
0.373
0.416
5/4/2010 9:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.064 0.053 0.064
0.064
0.053
0.064
5/4/2010 10:00
0
0.032
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011 0.000
0.000
0.000
0.000
5/4/2010 11:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
5/4/2010 12:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.011
0.000
1.524
0.053
0.011
0.000
0.011
0.000
0.000 0.000 0.000 0.000 1.536 1.483 1.579
1.504
1.302
1.419
Totals (mm)

Data from rain event on 5/4/2010.

42

Table 9.

Date/Time rainfall
5/4/2010 23:00
1.016
5/5/2010 0:00
5.588
5/5/2010 1:00
2.54
5/5/2010 2:00
0.508
5/5/2010 3:00
0
5/5/2010 4:00
0
5/5/2010 5:00
0
5/5/2010 6:00
0
5/5/2010 7:00
0.254
5/5/2010 8:00
0.762
5/5/2010 9:00
0.762
5/5/2010 10:00
0
5/5/2010 11:00
0
5/5/2010 12:00
0
5/5/2010 13:00
0
5/5/2010 14:00
0
5/5/2010 15:00
0
5/5/2010 16:00
0
5/5/2010 17:00
0
Totals (mm) 11.430

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
0.032
0.011
0.021
0.032
0.021
0.032 0.011 0.000 0.000 1.078 0.950 1.110
1.056
0.971
0.886
1.867
0.608
1.056
0.085
0.149
0.096 0.064 0.000 0.085 5.730 5.399 5.442
5.943
5.218
5.794
2.049
1.910
2.209
0.256
0.043
0.160 0.405 0.000 0.662 2.347 2.294 2.401
2.390
2.177
2.390
1.590
1.697
1.739
0.854
0.363
0.779 0.992 0.000 0.950 0.555 0.534 0.523
0.544
0.534
0.555
0.768
0.822
0.800
0.598
0.555
0.576 0.630 0.000 0.523 0.021 0.011 0.021
0.021
0.000
0.011
0.491
0.491
0.523
0.427
0.405
0.416 0.491 0.000 0.395 0.011 0.011 0.000
0.000
0.000
0.011
0.352
0.341
0.363
0.320
0.277
0.309 0.384 0.000 0.320 0.011 0.011 0.011
0.000
0.000
0.000
0.267
0.245
0.267
0.235
0.213
0.235 0.309 0.000 0.256 0.000 0.000 0.000
0.000
0.000
0.000
0.224
0.203
0.213
0.192
0.160
0.181 0.267 0.000 0.224 0.139 0.160 0.181
0.107
0.085
0.128
0.256
0.267
0.267
0.181
0.160
0.203 0.309 0.000 0.267 0.630 0.619 0.704
0.651
0.598
0.640
0.480
0.523
0.555
0.352
0.320
0.309 0.480 0.000 0.469 0.811 0.790 0.822
0.875
0.758
0.811
0.405
0.405
0.459
0.267
0.267
0.277 0.373 0.000 0.341 0.011 0.011 0.011
0.000
0.011
0.011
0.277
0.288
0.309
0.213
0.192
0.224 0.299 0.000 0.267 0.000 0.011 0.000
0.000
0.000
0.011
0.192
0.192
0.203
0.171
0.149
0.192 0.235 0.000 0.192 0.000 0.000 0.000
0.000
0.000
0.000
0.139
0.128
0.128
0.107
0.107
0.139 0.171 0.000 0.149 0.011 0.000 0.000
0.000
0.000
0.000
0.096
0.075
0.075
0.075
0.064
0.096 0.117 0.000 0.096 0.000 0.000 0.000
0.000
0.000
0.000
0.053
0.043
0.043
0.021
0.043
0.064 0.064 0.000 0.053 0.000 0.000 0.000
0.000
0.000
0.000
0.032
0.011
0.000
0.000
0.021
0.011 0.021 0.000 0.021 0.000 0.000 0.000
0.000
0.000
0.000
0.021
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
9.592
8.259
9.230
4.385
3.510
4.300 5.623 0.000 5.271 11.353 10.798 11.225
11.588
10.350
11.246

Data from rain event on 5/5/2010.

43

Table 10.

Date/Time rainfall
5/13/2010 10:00
0.762
5/13/2010 11:00
1.778
5/13/2010 12:00
0.254
5/13/2010 13:00
3.81
5/13/2010 14:00
1.778
5/13/2010 15:00
0.508
5/13/2010 16:00
0.254
5/13/2010 17:00
1.27
5/13/2010 18:00
0.762
5/13/2010 19:00
0
5/13/2010 20:00
0.254
5/13/2010 21:00
0
5/13/2010 22:00
0.254
5/13/2010 23:00
1.524
5/14/2010 0:00
0
5/14/2010 1:00
0
5/14/2010 2:00
0
5/14/2010 3:00
0
5/14/2010 4:00
0
5/14/2010 5:00
0
5/14/2010 6:00
0
5/14/2010 7:00
0
5/14/2010 8:00
0
5/14/2010 9:00
0
5/14/2010 10:00
0
5/14/2010 11:00
0
5/14/2010 12:00
0
5/14/2010 13:00
0
5/14/2010 14:00
0
5/14/2010 15:00
0
5/14/2010 16:00
0
5/14/2010 17:00
0
5/14/2010 18:00
0
5/14/2010 19:00
0

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.011 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.790 0.811 0.939
0.715
0.747
0.726
0.309
0.032
0.021
0.032
0.021
0.032 0.000 0.000 0.000 1.568 1.440 1.622
1.504
1.611
1.558
0.480
0.011
0.053
0.000
0.000
0.000 0.000 0.000 0.000 0.213 0.203 0.213
0.181
0.245
0.181
0.768
0.096
0.469
0.064
0.096
0.085 0.043 0.000 0.000 3.745 3.468 3.863
3.660
3.468
3.820
2.443
2.155
2.486
0.341
0.085
0.203 0.630 0.000 0.790 1.985 1.750 1.942
1.953
1.536
1.921
0.971
1.099
1.056
0.587
0.405
0.480 0.822 0.000 0.651 0.427 0.384 0.437
0.384
0.288
0.416
0.672
0.704
0.736
0.480
0.395
0.437 0.576 0.000 0.501 0.224 0.213 0.235
0.203
0.149
0.213
0.896
0.843
0.886
0.576
0.534
0.534 0.662 0.000 0.651 1.206 1.142 1.270
1.184
1.067
1.227
0.832
0.832
0.864
0.566
0.544
0.566 0.672 0.000 0.630 0.864 0.832 0.907
0.843
0.651
0.864
0.715
0.726
0.747
0.512
0.523
0.523 0.630 0.000 0.566 0.053 0.053 0.053
0.043
0.043
0.053
0.491
0.501
0.534
0.405
0.427
0.437 0.480 0.000 0.437 0.267 0.235 0.288
0.224
0.181
0.224
0.427
0.416
0.459
0.352
0.363
0.373 0.437 0.000 0.395 0.064 0.043 0.043
0.043
0.032
0.064
0.352
0.309
0.352
0.288
0.288
0.320 0.363 0.000 0.331 0.171 0.171 0.203
0.160
0.139
0.149
0.672
0.619
0.630
0.459
0.491
0.459 0.523 0.000 0.555 1.504 1.462 1.547
1.536
1.398
1.601
0.630
0.640
0.662
0.469
0.491
0.469 0.576 0.000 0.544 0.064 0.043 0.064
0.043
0.043
0.053
0.427
0.459
0.480
0.363
0.395
0.384 0.448 0.000 0.416 0.000 0.011 0.000
0.011
0.000
0.021
0.331
0.320
0.341
0.299
0.331
0.331 0.363 0.000 0.341 0.011 0.000 0.011
0.000
0.000
0.000
0.256
0.224
0.267
0.235
0.267
0.277 0.309 0.000 0.277 0.000 0.000 0.000
0.000
0.000
0.000
0.203
0.171
0.203
0.203
0.213
0.224 0.256 0.000 0.235 0.000 0.000 0.000
0.000
0.000
0.000
0.171
0.149
0.181
0.171
0.181
0.203 0.213 0.000 0.203 0.000 0.000 0.000
0.000
0.000
0.000
0.149
0.117
0.149
0.139
0.149
0.160 0.192 0.000 0.181 0.000 0.000 0.000
0.000
0.000
0.000
0.117
0.107
0.128
0.117
0.128
0.139 0.171 0.000 0.149 0.000 0.000 0.000
0.000
0.011
0.000
0.107
0.096
0.107
0.096
0.117
0.117 0.149 0.000 0.139 0.000 0.000 0.000
0.000
0.000
0.000
0.085
0.085
0.096
0.096
0.107
0.117 0.128 0.000 0.107 0.000 0.000 0.000
0.000
0.000
0.000
0.075
0.064
0.075
0.075
0.085
0.085 0.107 0.000 0.096 0.000 0.000 0.000
0.000
0.000
0.000
0.064
0.053
0.053
0.043
0.064
0.075 0.075 0.000 0.075 0.000 0.000 0.000
0.000
0.000
0.000
0.043
0.032
0.043
0.043
0.053
0.064 0.053 0.000 0.053 0.000 0.000 0.000
0.000
0.000
0.000
0.043
0.021
0.032
0.021
0.043
0.043 0.032 0.000 0.032 0.000 0.000 0.000
0.000
0.000
0.000
0.032
0.011
0.021
0.011
0.032
0.021 0.032 0.000 0.021 0.000 0.000 0.000
0.000
0.000
0.000
0.021
0.000
0.011
0.000
0.021
0.011 0.011 0.000 0.011 0.000 0.000 0.000
0.000
0.000
0.000
0.021
0.000
0.011
0.011
0.011
0.011 0.000 0.000 0.000 0.011 0.000 0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.011
0.011 0.011 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000

44

Table 10 (cont’d)

5/14/2010 20:00
0
5/14/2010 21:00
0
Totals (mm) 13.208

0.011
0.011
12.836

0.000
0.000
10.894

0.000
0.000
12.153

0.000
0.000
7.053

0.011
0.000
6.882

0.000
0.000
7.192

0.000
0.000
8.963

Data from rain event on 5/13/2010.

45

0.000
0.000
0.011

0.000 0.000 0.000 0.000
0.000 0.000 0.000 0.000
8.387 13.167 12.260 13.636

0.000
0.000
12.687

0.000
0.000
11.609

0.000
0.000
13.092

Table 11.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
5/21/2010 15:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
5/21/2010 16:00
1.016
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
5/21/2010 17:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000 0.662 0.726 0.768
0.555
0.672
0.608
5/21/2010 18:00
1.524
0.021
0.011
0.000
0.021
0.000
0.011 0.000
0.000
0.000 0.960 0.971 0.992
0.864
0.886
0.939
5/21/2010 19:00
0.254
0.021
0.021
0.021
0.021
0.021
0.021 0.000
0.000
0.000 0.640 0.576 0.640
0.576
0.587
0.576
5/21/2010 20:00
0
0.427
0.043
0.021
0.032
0.021
0.032 0.011
0.000
0.000 1.750 1.665 1.825
1.675
1.633
1.654
5/21/2010 21:00
0
0.608
0.011
0.235
0.000
0.000
0.011 0.011
0.000
0.000 0.203 0.203 0.213
0.181
0.192
0.203
5/21/2010 22:00
0
0.235
0.213
0.299
0.000
0.000
0.000 0.000
0.000
0.000 0.021 0.000 0.011
0.011
0.011
0.011
5/21/2010 23:00
0
0.107
0.149
0.192
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.011
5/22/2010 0:00
0.254
0.053
0.075
0.117
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
5/22/2010 1:00
0.254
0.032
0.064
0.085
0.000
0.000
0.000 0.000
0.000
0.000 0.011 0.000 0.000
0.000
0.011
0.000
5/22/2010 2:00
0
0.032
0.053
0.064
0.000
0.000
0.000 0.000
0.000
0.000 0.128 0.171 0.171
0.085
0.064
0.096
5/22/2010 3:00
0
0.053
0.053
0.075
0.011
0.011
0.000 0.000
0.000
0.000 0.256 0.235 0.267
0.245
0.235
0.224
5/22/2010 4:00
0
0.064
0.075
0.085
0.000
0.000
0.000 0.000
0.000
0.000 0.043 0.043 0.043
0.021
0.043
0.043
5/22/2010 5:00
0
0.043
0.064
0.075
0.000
0.000
0.000 0.000
0.000
0.000 0.011 0.011 0.011
0.011
0.011
0.021
5/22/2010 6:00
0
0.032
0.043
0.053
0.000
0.000
0.000 0.000
0.000
0.000 0.011 0.011 0.011
0.000
0.000
0.000
5/22/2010 7:00
0
0.032
0.032
0.053
0.000
0.000
0.000 0.000
0.000
0.000 0.011 0.000 0.011
0.000
0.000
0.011
5/22/2010 8:00
0
0.021
0.032
0.032
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.011 0.011
0.000
0.000
0.000
5/22/2010 9:00
0
0.011
0.032
0.043
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.011
0.000
0.000
5/22/2010 10:00
0
0.011
0.032
0.021
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.011
5/22/2010 11:00
0
0.011
0.021
0.032
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
5/22/2010 12:00
0
0.011
0.011
0.021
0.000
0.000
0.000 0.000
0.000
0.000 0.000 0.000 0.000
0.000
0.000
0.000
4.572
1.825
1.035
1.526
0.085
0.053
0.075 0.021
0.000
0.000 4.705 4.620 4.972
4.236
4.343
4.407
Totals (mm)

Data of rain event on 5/21/2010.

46

Table 12.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
6/4/2010 12:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/4/2010 13:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000 0.000
0.000
0.000
0.000
6/4/2010 14:00
0
0.011
0.000
0.000
0.011
0.000
0.000 0.000 0.000 0.000 0.523 0.501 0.608
0.459
0.448
0.405
6/4/2010 15:00
0.254
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.320 0.277 0.331
0.299
0.309
0.277
6/4/2010 16:00
2.286
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.032 0.032 0.043
0.032
0.032
0.032
6/4/2010 17:00
2.032
0.011
0.011
0.000
0.011
0.000
0.011 0.000 0.000 0.000 0.320 0.299 0.309
0.235
0.213
0.235
6/4/2010 18:00
0
0.043
0.053
0.021
0.021
0.021
0.021 0.000 0.000 0.000 2.102 1.899 2.177
2.027
1.921
1.985
6/4/2010 19:00
0
1.024
0.992
0.800
0.096
0.043
0.043 0.032 0.000 0.000 2.113 1.910 2.081
2.049
1.910
2.027
6/4/2010 20:00
0
0.512
0.598
0.651
0.011
0.000
0.032 0.053 0.000 0.000 0.075 0.064 0.064
0.064
0.075
0.053
6/4/2010 21:00
0
0.149
0.192
0.256
0.011
0.011
0.000 0.053 0.000 0.000 0.021 0.011 0.000
0.000
0.011
0.011
6/4/2010 22:00
0
0.064
0.096
0.128
0.000
0.000
0.000 0.021 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
6/4/2010 23:00
0
0.021
0.043
0.064
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000 0.000
0.011
0.000
0.000
6/5/2010 0:00
0
0.011
0.021
0.043
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.011
5.334
1.857
2.006
1.963
0.160
0.075
0.107 0.160 0.000 0.000 5.527 4.994 5.623
5.175
4.919
5.036
Totals (mm)

Data from rain event on 6/4/2010.

47

Table 13.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
6/5/2010 20:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/5/2010 21:00
1.524
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/5/2010 22:00
2.794
0.011
0.000
0.000
0.011
0.000
0.000 0.000 0.000 0.000 0.288 0.309 0.341
0.192
0.171
0.213
6/5/2010 23:00
2.54
0.181
0.043
0.032
0.043
0.043
0.043 0.011 0.000 0.000 1.942 1.739 1.867
1.729
1.686
1.803
6/6/2010 0:00
1.27
1.462
1.366
1.280
0.053
0.160
0.053 0.128 0.000 0.107 2.977 2.796 2.913
2.849
2.625
2.817
6/6/2010 1:00
0
1.921
2.209
2.155
1.302
1.152
1.483 1.078 0.000 0.928 2.390 2.315 2.294
2.337
2.091
2.326
6/6/2010 2:00
0
1.665
1.622
1.665
1.462
1.590
1.601 1.206 0.000 0.928 1.601 1.558 1.440
1.440
1.312
1.504
6/6/2010 3:00
1.778
1.046
0.928
0.992
0.896
0.982
0.950 0.864 0.000 0.758 0.149 0.139 0.128
0.139
0.128
0.149
6/6/2010 4:00
0.254
0.544
0.405
0.469
0.405
0.437
0.437 0.480 0.000 0.437 0.032 0.011 0.011
0.011
0.011
0.011
6/6/2010 5:00
0.254
1.120
0.811
1.024
0.704
0.715
0.694 0.694 0.000 0.726 2.305 2.283 2.294
2.102
1.942
2.294
6/6/2010 6:00
2.794
1.056
1.035
1.152
1.014
0.971
1.067 0.960 0.000 0.907 0.395 0.395 0.405
0.395
0.309
0.437
6/6/2010 7:00
0
0.630
0.566
0.640
0.544
0.566
0.598 0.619 0.000 0.587 0.117 0.139 0.139
0.107
0.085
0.139
6/6/2010 8:00
0
2.038
1.878
1.953
1.729
1.931
1.782 1.504 0.000 1.419 2.956 2.785 2.806
2.881
2.443
2.881
6/6/2010 9:00
0
0.832
0.790
0.886
0.864
0.875
0.907 0.992 0.000 0.896 0.021 0.021 0.011
0.021
0.021
0.021
6/6/2010 10:00
0
0.501
0.395
0.469
0.373
0.405
0.427 0.566 0.000 0.534 0.011 0.011 0.000
0.000
0.000
0.000
6/6/2010 11:00
0
0.320
0.267
0.299
0.235
0.245
0.277 0.373 0.000 0.341 0.000 0.000 0.011
0.000
0.000
0.011
6/6/2010 12:00
0
0.224
0.181
0.213
0.160
0.181
0.181 0.256 0.000 0.256 0.000 0.000 0.000
0.000
0.000
0.000
6/6/2010 13:00
0
0.171
0.128
0.149
0.107
0.128
0.128 0.203 0.000 0.181 0.000 0.000 0.000
0.000
0.011
0.000
6/6/2010 14:00
0
0.128
0.107
0.128
0.085
0.096
0.096 0.149 0.000 0.149 0.011 0.000 0.000
0.000
0.000
0.000
6/6/2010 15:00
0
0.107
0.096
0.096
0.064
0.085
0.075 0.128 0.000 0.117 0.000 0.000 0.000
0.011
0.000
0.000
6/6/2010 16:00
0.762
0.085
0.075
0.085
0.032
0.064
0.064 0.107 0.000 0.107 0.000 0.011 0.000
0.000
0.000
0.000
6/6/2010 17:00
0
0.064
0.053
0.075
0.043
0.053
0.032 0.096 0.000 0.075 0.043 0.085 0.085
0.000
0.000
0.011
6/6/2010 18:00
0
0.256
0.192
0.235
0.128
0.107
0.160 0.203 0.000 0.192 1.014 1.035 1.014
0.928
0.758
0.992
6/6/2010 19:00
0
0.277
0.224
0.267
0.107
0.107
0.128 0.181 0.000 0.181 0.032 0.021 0.021
0.021
0.021
0.000
6/6/2010 20:00
0
0.139
0.139
0.181
0.064
0.075
0.096 0.107 0.000 0.117 0.011 0.000 0.000
0.000
0.000
0.000
6/6/2010 21:00
0
0.085
0.096
0.107
0.021
0.064
0.032 0.075 0.000 0.075 0.000 0.000 0.000
0.000
0.000
0.000
6/6/2010 22:00
0
0.053
0.053
0.064
0.021
0.043
0.043 0.053 0.000 0.053 0.011 0.000 0.000
0.000
0.000
0.000
6/6/2010 23:00
0
0.032
0.021
0.043
0.000
0.032
0.021 0.043 0.000 0.043 0.000 0.000 0.000
0.000
0.000
0.000
6/7/2010 0:00
0
0.032
0.021
0.032
0.000
0.021
0.000 0.021 0.000 0.021 0.000 0.000 0.000
0.000
0.000
0.000
10.467
11.129
11.374 11.097 0.000 10.137 16.304 15.653 15.781
15.162
13.615
15.610
Totals (mm) 14.224 14.981 13.700 14.693

Data from rain event on 6/5/2010.

48

Table 14.

media
media
media
sedum
sedum
sedum grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
6/8/2010 21:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.107 0.139 0.203
0.064
0.053
0.053
6/8/2010 22:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.085 0.032 0.021
0.021
0.064
0.032
6/8/2010 23:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000 0.000
0.011
0.011
0.000
6/9/2010 0:00
1.27
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.299 0.320 0.405
0.277
0.267
0.277
6/9/2010 1:00
0.508
0.011
0.021
0.011
0.011
0.011
0.000 0.000 0.000 0.000 0.875 0.800 0.864
0.811
0.736
0.800
6/9/2010 2:00
2.286
0.235
0.032
0.011
0.032
0.032
0.032 0.011 0.000 0.000 1.312 1.195 1.323
1.206
1.174
1.216
6/9/2010 3:00
4.318
0.448
0.011
0.096
0.011
0.021
0.011 0.000 0.000 0.000 0.598 0.619 0.662
0.544
0.512
0.587
6/9/2010 4:00
2.032
0.928
0.459
0.640
0.043
0.171
0.053 0.032 0.000 0.000 3.286 3.201 3.340
3.212
3.009
3.329
6/9/2010 5:00
1.27
3.404
3.500
3.532
1.195
1.014
1.483 1.558 0.000 1.633 3.180 3.233 3.233
3.222
2.934
3.414
6/9/2010 6:00
0
2.081
1.835
1.931
1.707
1.707
1.739 1.526 0.000 1.344 2.305 2.401 2.401
2.369
2.113
2.422
6/9/2010 7:00
0.254
1.931
1.878
1.910
1.793
1.825
1.803 1.739 0.000 1.601 0.928 0.982 0.982
0.971
0.843
0.971
6/9/2010 8:00
0
1.078
1.003
1.056
0.992
0.982
0.960 1.440 0.000 1.120 0.277 0.256 0.288
0.288
0.245
0.277
6/9/2010 9:00
0
0.651
0.619
0.630
0.587
0.587
0.566 0.843 0.000 0.758 0.149 0.160 0.181
0.149
0.117
0.171
6/9/2010 10:00
0
0.437
0.448
0.448
0.384
0.395
0.384 0.576 0.000 0.544 0.064 0.043 0.053
0.032
0.021
0.043
6/9/2010 11:00
0
0.309
0.320
0.320
0.256
0.277
0.277 0.427 0.000 0.395 0.021 0.021 0.011
0.011
0.011
0.021
6/9/2010 12:00
0
0.224
0.224
0.245
0.181
0.213
0.192 0.320 0.000 0.309 0.000 0.000 0.011
0.000
0.011
0.000
6/9/2010 13:00
0
0.171
0.181
0.171
0.117
0.149
0.139 0.245 0.000 0.235 0.000 0.011 0.000
0.000
0.000
0.000
6/9/2010 14:00
0
0.128
0.107
0.117
0.043
0.096
0.053 0.171 0.000 0.160 0.000 0.000 0.000
0.000
0.000
0.000
6/9/2010 15:00
0
0.085
0.064
0.064
0.011
0.043
0.021 0.107 0.000 0.107 0.000 0.000 0.000
0.000
0.000
0.000
6/9/2010 16:00
0
0.075
0.032
0.032
0.000
0.021
0.011 0.053 0.000 0.064 0.011 0.000 0.000
0.000
0.011
0.000
6/9/2010 17:00
0
0.043
0.011
0.032
0.000
0.000
0.000 0.021 0.000 0.032 0.000 0.000 0.000
0.000
0.000
0.000
6/9/2010 18:00
0
0.021
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/9/2010 19:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.011 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/9/2010 20:00
0.254
0.011
0.011
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/9/2010 21:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/9/2010 22:00
0
0.011
0.000
0.000
0.000
0.011
0.000 0.000 0.000 0.000 0.085 0.139 0.139
0.053
0.032
0.053
6/9/2010 23:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.043 0.011 0.000
0.000
0.011
0.000
6/10/2010 0:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000 0.000
0.000
0.000
0.000
7.362
7.554
7.725 9.070 0.011 8.301 13.647 13.562 14.116
13.241
12.174
13.668
Totals (mm) 13.462 12.324 10.755 11.246

Data from rain event on 6/8/2010.

49

Table 15.

Date/Time rainfall
6/11/2010 15:00
2.794
6/11/2010 16:00
0.508
6/11/2010 17:00
0
6/11/2010 18:00
0
6/11/2010 19:00
0
6/11/2010 20:00
1.27
6/11/2010 21:00
1.016
6/11/2010 22:00
5.334
6/11/2010 23:00
11.18
6/12/2010 0:00
21.08
6/12/2010 1:00
10.67
6/12/2010 2:00
0.508
6/12/2010 3:00
0
6/12/2010 4:00
0
6/12/2010 5:00
0
6/12/2010 6:00
0
6/12/2010 7:00
0
6/12/2010 8:00
0
6/12/2010 9:00
0
6/12/2010 10:00
0
6/12/2010 11:00
0
6/12/2010 12:00
0
6/12/2010 13:00
0
6/12/2010 14:00
0
6/12/2010 15:00
0
6/12/2010 16:00
0
6/12/2010 17:00
0
6/12/2010 18:00
0
6/12/2010 19:00
0
6/12/2010 20:00
0
6/12/2010 21:00
0
6/12/2010 22:00
0
6/12/2010 23:00
0
6/13/2010 0:00
0
Totals (mm) 54.360

media
media
media
sedum
sedum
sedum
grass
grass
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000
0.064
0.043
0.011
0.043
0.032
0.021 0.000 0.000
0.832
0.000
0.224
0.000
0.000
0.000 0.000 0.000
0.224
0.181
0.267
0.000
0.011
0.011 0.000 0.000
0.096
0.107
0.160
0.000
0.000
0.000 0.000 0.000
0.032
0.043
0.064
0.000
0.000
0.000 0.000 0.000
0.171
0.117
0.128
0.021
0.000
0.011 0.000 0.000
0.373
0.331
0.320
0.011
0.021
0.021 0.107 0.000
5.324
5.068
5.164
2.966
2.860
3.606 1.739 0.000
22.364 20.977 21.703
21.756
22.428
22.674 2.187 0.000
12.836 10.894 12.441
10.766
11.652
10.691 1.814 0.000
1.729
1.568
1.718
1.323
1.494
1.259 1.291 0.000
0.843
0.758
0.886
0.630
0.683
0.640 1.067 0.000
0.534
0.512
0.608
0.373
0.405
0.384 0.886 0.000
0.384
0.352
0.427
0.245
0.277
0.267 0.736 0.000
0.288
0.267
0.309
0.171
0.203
0.171 0.576 0.000
0.235
0.203
0.235
0.117
0.149
0.139 0.427 0.000
0.181
0.171
0.192
0.096
0.117
0.085 0.331 0.000
0.149
0.117
0.149
0.064
0.085
0.075 0.267 0.000
0.128
0.107
0.096
0.043
0.075
0.043 0.213 0.000
0.085
0.085
0.096
0.032
0.053
0.043 0.171 0.000
0.107
0.085
0.085
0.032
0.053
0.032 0.149 0.000
0.085
0.064
0.085
0.032
0.043
0.021 0.117 0.000
0.085
0.064
0.053
0.000
0.043
0.021 0.117 0.000
0.064
0.043
0.053
0.011
0.032
0.000 0.085 0.000
0.043
0.021
0.032
0.000
0.021
0.011 0.096 0.000
0.053
0.021
0.021
0.000
0.011
0.000 0.096 0.000
0.032
0.011
0.021
0.000
0.011
0.000 0.096 0.000
0.043
0.011
0.011
0.000
0.011
0.000 0.085 0.000
0.021
0.000
0.000
0.011
0.011
0.000 0.021 0.000
0.021
0.000
0.000
0.000
0.000
0.000 0.011 0.000
0.011
0.000
0.011
0.000
0.000
0.000 0.011 0.000
0.021
0.000
0.000
0.000
0.000
0.000 0.011 0.000
47.460 42.221 45.572
38.743
40.781
40.226 12.708 0.000

Data from rain event on 6/11/2010.
50

grass
(3)
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.085
2.924
21.255
13.145
1.942
1.024
0.662
0.469
0.341
0.277
0.203
0.160
0.117
0.107
0.107
0.075
0.064
0.043
0.032
0.021
0.021
0.011
0.011
0.000
0.000
0.000
43.096

steel
(1)
0.000
0.000
2.956
0.235
0.011
0.000
0.000
1.067
1.547
7.672
25.971
1.814
0.043
0.011
0.011
0.000
0.011
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
41.368

steel
(2)
0.000
0.000
2.913
0.192
0.000
0.000
0.000
1.099
1.590
7.704
26.142
1.707
0.021
0.011
0.000
0.011
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
41.400

steel
shingle
shingle
shingle
(3)
(1)
(2)
(3)
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
3.116
2.796
2.593
2.828
0.181
0.192
0.203
0.181
0.011
0.000
0.011
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
1.163
0.950
0.907
0.939
1.633
1.526
1.451
1.536
7.576
7.757
7.160
8.152
26.270
20.134
22.482
25.917
1.899
2.134
1.291
2.134
0.021
0.021
0.000
0.032
0.000
0.000
0.000
0.021
0.011
0.000
0.000
0.000
0.000
0.000
0.011
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
41.880
35.520
36.107
41.784

Table 16.

media
media
media
sedum sedum sedum grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
6/15/2010 17:00
3.048
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000
0.000
6/15/2010 18:00
0
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000
0.000
6/15/2010 19:00
0.254
0.288
0.053
0.043
0.053
0.053
0.032
0.032
0.000
0.000
2.860
2.732 3.062
2.817
2.774
2.593
6/15/2010 20:00
0
0.523
0.000
0.096
0.000
0.011
0.000
0.000
0.000
0.000
0.139
0.107 0.085
0.107
0.117
0.096
6/15/2010 21:00
0
0.160
0.000
0.160
0.000
0.000
0.000
0.000
0.000
0.000
0.128
0.149 0.192
0.075
0.085
0.085
6/15/2010 22:00
0
0.139
0.021
0.149
0.011
0.000
0.000
0.000
0.000
0.000
0.171
0.139 0.139
0.139
0.139
0.128
6/15/2010 23:00
2.54
0.085
0.075
0.107
0.000
0.000
0.000
0.000
0.000
0.000
0.032
0.011 0.011
0.000
0.011
0.011
6/16/2010 0:00
5.842
0.053
0.064
0.085
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.011 0.000
0.000
0.000
0.011
6/16/2010 1:00
1.524
0.950
0.405
0.501
0.085
0.139
0.107
0.043
0.000
0.203
5.474
5.495 5.644
5.015
5.015
5.314
6/16/2010 2:00
5.842
3.105
3.169
3.500
1.515
0.992
1.718
0.544
0.000
2.241
2.134
2.027 2.123
2.443
2.081
2.305
6/16/2010 3:00
2.032
1.633
1.622
1.718
1.451
1.408
1.654
0.523
0.000
1.398
1.974
2.006 2.038
1.931
1.878
2.123
6/16/2010 4:00
0
4.972
4.385
4.673
4.577
4.503
4.834
0.534
0.000
3.638
5.303
5.207 5.324
5.196
4.919
5.516
6/16/2010 5:00
0.254
3.457
2.881
2.988
3.030
3.137
2.977
0.555
0.000
2.945
1.654
1.675 1.697
1.686
1.536
1.771
6/16/2010 6:00
0
1.761
1.601
1.654
1.504
1.686
1.494
0.512
0.000
1.729
0.107
0.064 0.053
0.064
0.053
0.075
6/16/2010 7:00
0.254
0.960
0.928
0.918
0.758
0.918
0.800
0.491
0.000
1.099
0.128
0.171 0.203
0.139
0.107
0.171
6/16/2010 8:00
0
0.715
0.790
0.704
0.512
0.598
0.576
0.469
0.000
0.843
0.277
0.235 0.267
0.256
0.213
0.277
6/16/2010 9:00
0
0.512
0.544
0.512
0.363
0.437
0.405
0.469
0.000
0.630
0.021
0.032 0.021
0.021
0.011
0.043
6/16/2010 10:00
0
0.395
0.395
0.395
0.256
0.320
0.288
0.469
0.000
0.480
0.021
0.021 0.011
0.000
0.011
0.011
6/16/2010 11:00
0
0.299
0.299
0.320
0.192
0.235
0.213
0.448
0.000
0.384
0.011
0.000 0.000
0.000
0.000
0.000
6/16/2010 12:00
0
0.235
0.224
0.235
0.139
0.171
0.149
0.427
0.000
0.288
0.000
0.011 0.011
0.000
0.000
0.000
6/16/2010 13:00
0
0.181
0.181
0.192
0.107
0.149
0.117
0.405
0.000
0.235
0.000
0.000 0.000
0.000
0.000
0.000
6/16/2010 14:00
0
0.149
0.139
0.149
0.075
0.117
0.096
0.427
0.000
0.192
0.011
0.000 0.000
0.000
0.011
0.000
6/16/2010 15:00
0
0.128
0.117
0.117
0.064
0.096
0.075
0.416
0.000
0.160
0.000
0.000 0.000
0.000
0.000
0.011
6/16/2010 16:00
0
0.096
0.096
0.096
0.043
0.085
0.043
0.395
0.000
0.128
0.000
0.000 0.000
0.000
0.000
0.000
6/16/2010 17:00
0
0.085
0.064
0.064
0.021
0.064
0.032
0.405
0.000
0.107
0.000
0.011 0.000
0.000
0.000
0.000
6/16/2010 18:00
0
0.075
0.053
0.053
0.000
0.053
0.011
0.171
0.000
0.075
0.000
0.000 0.000
0.000
0.000
0.000
6/16/2010 19:00
0
0.053
0.032
0.032
0.011
0.032
0.000
0.064
0.000
0.053
0.000
0.000 0.000
0.000
0.000
0.000
6/16/2010 20:00
0
0.053
0.032
0.021
0.000
0.021
0.000
0.053
0.000
0.043
0.000
0.000 0.000
0.000
0.000
0.000
6/16/2010 21:00
0
0.032
0.011
0.011
0.000
0.011
0.000
0.032
0.000
0.032
0.000
0.000 0.000
0.000
0.000
0.000
6/16/2010 22:00
0
0.043
0.000
0.011
0.000
0.000
0.000
0.021
0.000
0.011
0.000
0.000 0.000
0.000
0.000
0.000
6/16/2010 23:00
0
0.032
0.011
0.000
0.000
0.011
0.000
0.021
0.000
0.011
0.000
0.000 0.000
0.000
0.000
0.000
6/17/2010 0:00
0
0.021
0.000
0.011
0.000
0.000
0.000
0.021
0.000
0.011
0.000
0.000 0.000
0.000
0.000
0.000
7.949
0.000 16.933 20.454 20.102 20.881
19.889
18.961
20.540
Totals (mm) 21.590 21.191 18.192 19.515 14.767 15.247 15.621

Data from rain event on 6/15/2010.
51

Table 17.

Date/Time rainfall
6/22/2010 3:00
0.508
6/22/2010 4:00
4.064
6/22/2010 5:00
4.064
6/22/2010 6:00
2.032
6/22/2010 7:00
0
6/22/2010 8:00
0
6/22/2010 9:00
0
6/22/2010 10:00
0
6/22/2010 11:00
0
6/22/2010 12:00
0
6/22/2010 13:00
0
6/22/2010 14:00
0
6/22/2010 15:00
0
6/22/2010 16:00
0
6/22/2010 17:00
0
Totals (mm) 10.668

media
media
media
sedum sedum sedum grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000
0.000
0.021
0.032
0.000
0.021
0.021
0.021
0.000
0.000
0.000
3.841
3.767 4.012
3.606
3.638
3.980
3.809
2.091
3.158
0.085
0.107
0.085
0.128
0.000
0.501
5.431
5.356 5.303
5.580
5.143
5.890
1.312
1.174
1.259
0.405
0.288
0.683
0.512
0.000
0.726
0.064
0.075 0.064
0.043
0.043
0.064
0.555
0.523
0.491
0.277
0.331
0.427
0.437
0.000
0.395
0.021
0.011 0.000
0.000
0.011
0.011
0.320
0.299
0.277
0.171
0.203
0.235
0.363
0.000
0.245
0.011
0.011 0.032
0.011
0.000
0.021
0.213
0.213
0.171
0.085
0.139
0.149
0.299
0.000
0.149
0.000
0.011 0.000
0.000
0.011
0.011
0.128
0.128
0.117
0.053
0.096
0.096
0.235
0.000
0.107
0.011
0.000 0.000
0.011
0.000
0.000
0.085
0.096
0.064
0.011
0.064
0.053
0.107
0.000
0.064
0.000
0.000 0.011
0.000
0.000
0.000
0.053
0.064
0.053
0.011
0.043
0.043
0.053
0.000
0.043
0.000
0.011 0.000
0.000
0.000
0.000
0.032
0.032
0.021
0.000
0.032
0.011
0.021
0.000
0.021
0.000
0.000 0.000
0.000
0.000
0.000
0.011
0.032
0.011
0.000
0.011
0.011
0.011
0.000
0.011
0.000
0.000 0.000
0.000
0.000
0.011
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000
0.000
0.000
0.000
6.551
4.684
5.623
1.120
1.334
1.814
2.166
0.000
2.262
9.379
9.240 9.422
9.251
8.845
9.987

Data from rain event on 6/22/2010.

52

Table 18.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
6/23/2010 23:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000 0.000
0.000
0.000
0.000
6/24/2010 0:00
2.794
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/24/2010 1:00
2.794
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/24/2010 2:00
0.762
0.021
0.021
0.011
0.011
0.000
0.011 0.000 0.000 0.000 1.067 1.131 1.216
1.003
0.971
1.024
6/24/2010 3:00
0
1.131
0.736
1.099
0.085
0.107
0.117 0.075 0.000 0.149 5.079 4.940 4.866
5.004
4.780
5.356
6/24/2010 4:00
2.032
1.216
1.291
1.440
0.064
0.000
0.064 0.331 0.000 0.672 0.213 0.149 0.149
0.139
0.149
0.171
6/24/2010 5:00
0.254
0.534
0.608
0.576
0.299
0.011
0.320 0.299 0.000 0.384 0.000 0.000 0.011
0.000
0.000
0.011
6/24/2010 6:00
0
0.341
0.363
0.331
0.213
0.181
0.267 0.267 0.000 0.256 0.107 0.128 0.149
0.107
0.096
0.128
6/24/2010 7:00
0.254
1.184
0.971
1.227
0.640
0.640
0.608 0.256 0.011 0.726 3.148 2.892 2.924
3.030
2.614
3.041
6/24/2010 8:00
0
1.174
1.163
1.227
0.939
0.790
0.982 0.277 0.000 0.779 0.213 0.160 0.171
0.160
0.149
0.192
6/24/2010 9:00
0
0.619
0.619
0.598
0.619
0.523
0.640 0.256 0.000 0.480 0.011 0.000 0.000
0.000
0.000
0.011
6/24/2010 10:00
0
0.416
0.373
0.352
0.352
0.352
0.395 0.245 0.000 0.331 0.000 0.011 0.000
0.011
0.000
0.000
6/24/2010 11:00
0
0.277
0.256
0.235
0.235
0.245
0.277 0.235 0.000 0.245 0.011 0.000 0.000
0.000
0.011
0.000
6/24/2010 12:00
0
0.213
0.192
0.181
0.149
0.192
0.192 0.245 0.000 0.213 0.000 0.011 0.000
0.000
0.000
0.011
6/24/2010 13:00
0
0.160
0.149
0.139
0.128
0.149
0.149 0.256 0.000 0.171 0.011 0.000 0.000
0.000
0.000
0.000
6/24/2010 14:00
0
0.107
0.107
0.107
0.075
0.117
0.096 0.288 0.000 0.117 0.000 0.000 0.000
0.000
0.000
0.000
6/24/2010 15:00
0
0.075
0.085
0.064
0.032
0.075
0.053 0.309 0.000 0.085 0.000 0.000 0.000
0.000
0.000
0.000
6/24/2010 16:00
0
0.043
0.053
0.032
0.000
0.043
0.021 0.299 0.000 0.053 0.000 0.000 0.000
0.000
0.000
0.000
6/24/2010 17:00
0
0.021
0.021
0.011
0.011
0.032
0.011 0.245 0.000 0.032 0.000 0.000 0.000
0.000
0.000
0.000
6/24/2010 18:00
0
0.011
0.011
0.000
0.000
0.011
0.000 0.213 0.000 0.011 0.000 0.011 0.011
0.000
0.000
0.000
6/24/2010 19:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.181 0.000 0.011 0.000 0.000 0.000
0.000
0.000
0.000
6/24/2010 20:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.043 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
9.144
7.544
7.021
7.629
3.852
3.468
4.204 4.321 0.011 4.716 9.870 9.432 9.496
9.454
8.771
9.944
Totals (mm)

Data from rain event on 6/24/2010.

53

Table 19.

media
media
media
sedum sedum sedum grass
grass
grass
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
6/26/2010 4:00
1.524
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
6/26/2010 5:00
3.048
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
6/26/2010 6:00
4.826
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
6/26/2010 7:00
4.572
0.021
0.011
0.000
0.000
0.000
0.000 0.000 0.000 0.000
6/26/2010 8:00
3.556
0.864
0.363
0.555
0.128
0.235
0.117 0.021 0.000 0.096
6/26/2010 9:00
2.286 10.521 10.659 10.830
8.248
8.131
8.749 0.235 0.000 7.320
6/26/2010 10:00
0.762
4.407
3.340
3.617
2.465
2.774
2.529 0.299 0.000 3.510
6/26/2010 11:00
0
1.302
1.120
1.152
0.832
1.014
0.843 0.235 0.000 1.248
6/26/2010 12:00
0
0.736
0.683
0.704
0.459
0.523
0.491 0.203 0.000 0.726
6/26/2010 13:00
0
0.501
0.448
0.459
0.288
0.341
0.309 0.192 0.000 0.501
6/26/2010 14:00
0
0.363
0.320
0.320
0.192
0.245
0.213 0.192 0.000 0.363
6/26/2010 15:00
0
0.277
0.235
0.235
0.139
0.171
0.128 0.203 0.000 0.277
6/26/2010 16:00
0
0.203
0.171
0.171
0.085
0.128
0.075 0.203 0.000 0.192
6/26/2010 17:00
0
0.149
0.128
0.128
0.053
0.064
0.032 0.203 0.000 0.149
6/26/2010 18:00
0
0.107
0.085
0.085
0.021
0.043
0.011 0.192 0.000 0.085
6/26/2010 19:00
0
0.064
0.053
0.043
0.000
0.021
0.000 0.181 0.000 0.043
Totals (mm) 20.574 19.515 17.616 18.299 12.911 13.690 13.498 2.358 0.000 14.511

Data from rain event on 6/26/2010.

54

steel
(1)
0.000
0.000
0.000
1.408
6.349
11.097
0.053
0.011
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
18.929

steel
(2)
0.000
0.000
0.000
1.419
5.997
11.364
0.032
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
18.822

steel
shingle
shingle
shingle
(3)
(1)
(2)
(3)
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
1.611
1.387
1.248
1.387
6.199
6.114
5.740
6.573
11.257
10.414
10.104
11.396
0.021
0.021
0.021
0.032
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
19.099
17.936
17.125
19.398

Table 20.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
6/27/2010 6:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.011 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/27/2010 7:00
1.016
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/27/2010 8:00
1.778
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/27/2010 9:00
1.27
0.011
0.011
0.000
0.000
0.021
0.000 0.000 0.000 0.000 0.331 0.352 0.534
0.256
0.267
0.256
6/27/2010 10:00
0.762
0.117
0.043
0.075
0.021
0.107
0.032 0.021 0.011 0.000 1.547 1.472 1.963
1.472
1.472
1.462
6/27/2010 11:00
0
0.683
0.587
0.630
0.032
0.160
0.053 0.352 0.427 0.341 1.878 1.814 2.145
1.803
1.761
1.942
6/27/2010 12:00
0
0.864
0.864
0.928
0.373
0.405
0.352 0.555 0.566 0.598 1.142 1.056 1.174
1.067
1.014
1.142
6/27/2010 13:00
0
0.587
0.619
0.662
0.341
0.331
0.331 0.427 0.437 0.469 0.107 0.075 0.053
0.064
0.075
0.075
6/27/2010 14:00
0
0.373
0.395
0.405
0.256
0.235
0.277 0.277 0.299 0.309 0.011 0.011 0.000
0.011
0.000
0.011
6/27/2010 15:00
0
0.245
0.267
0.288
0.203
0.213
0.235 0.224 0.224 0.224 0.000 0.011 0.000
0.000
0.011
0.000
6/27/2010 16:00
0
0.181
0.203
0.203
0.160
0.171
0.181 0.181 0.181 0.181 0.011 0.000 0.011
0.000
0.000
0.000
6/27/2010 17:00
0.254
0.160
0.149
0.139
0.107
0.128
0.139 0.139 0.139 0.139 0.000 0.000 0.011
0.000
0.000
0.011
6/27/2010 18:00
0
0.107
0.117
0.117
0.085
0.107
0.107 0.107 0.117 0.107 0.000 0.000 0.000
0.000
0.000
0.000
6/27/2010 19:00
0
0.107
0.085
0.085
0.064
0.085
0.075 0.085 0.085 0.085 0.000 0.000 0.000
0.000
0.000
0.000
6/27/2010 20:00
0
0.085
0.064
0.064
0.053
0.064
0.043 0.064 0.064 0.064 0.000 0.000 0.000
0.000
0.000
0.000
6/27/2010 21:00
0
0.064
0.053
0.043
0.032
0.043
0.021 0.043 0.043 0.043 0.000 0.000 0.000
0.000
0.000
0.000
6/27/2010 22:00
0
0.043
0.032
0.021
0.021
0.011
0.000 0.021 0.021 0.021 0.000 0.000 0.000
0.000
0.000
0.000
6/27/2010 23:00
0
0.043
0.011
0.011
0.011
0.021
0.000 0.021 0.011 0.011 0.000 0.000 0.000
0.000
0.000
0.000
6/28/2010 0:00
0
0.021
0.021
0.011
0.011
0.011
0.000 0.011 0.011 0.021 0.000 0.000 0.000
0.000
0.000
0.000
6/28/2010 1:00
0
0.032
0.000
0.011
0.011
0.011
0.000 0.011 0.000 0.011 0.000 0.000 0.000
0.000
0.000
0.000
6/28/2010 2:00
0
0.032
0.011
0.000
0.021
0.011
0.011 0.011 0.011 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/28/2010 3:00
0
0.021
0.000
0.000
0.011
0.011
0.000 0.011 0.011 0.011 0.000 0.000 0.000
0.000
0.000
0.000
6/28/2010 4:00
0
0.021
0.011
0.000
0.000
0.000
0.000 0.011 0.011 0.011 0.000 0.000 0.000
0.000
0.000
0.000
6/28/2010 5:00
0
0.021
0.000
0.011
0.011
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/28/2010 6:00
0
0.021
0.000
0.000
0.000
0.011
0.000 0.011 0.011 0.011 0.000 0.000 0.000
0.000
0.000
0.000
6/28/2010 7:00
0.254
0.011
0.000
0.000
0.011
0.000
0.011 0.000 0.000 0.011 0.000 0.000 0.000
0.000
0.000
0.000
6/28/2010 8:00
0
0.021
0.011
0.000
0.000
0.000
0.000 0.011 0.011 0.000 0.011 0.032 0.021
0.011
0.000
0.000
6/28/2010 9:00
0
0.021
0.000
0.000
0.000
0.000
0.000 0.011 0.000 0.000 0.331 0.331 0.373
0.235
0.224
0.256
6/28/2010 10:00
1.016
0.043
0.021
0.053
0.011
0.000
0.000 0.011 0.032 0.021 0.032 0.021 0.032
0.043
0.032
0.043
6/28/2010 11:00
0
0.043
0.032
0.032
0.000
0.000
0.000 0.032 0.032 0.021 0.011 0.011 0.000
0.011
0.011
0.011
6/28/2010 12:00
0
0.043
0.043
0.021
0.000
0.011
0.011 0.021 0.021 0.021 0.662 0.704 0.662
0.587
0.512
0.566
6/28/2010 13:00
0
0.192
0.149
0.181
0.000
0.000
0.000 0.117 0.139 0.096 0.171 0.107 0.139
0.149
0.160
0.149
6/28/2010 14:00
0
0.096
0.096
0.075
0.000
0.000
0.000 0.064 0.064 0.075 0.000 0.000 0.000
0.000
0.000
0.000

55

Table 20 (cont’d)

6/28/2010 15:00
0
6/28/2010 16:00
0
Totals (mm) 6.604

0.043
0.032
4.385

0.053
0.032
3.980

0.043
0.021
4.129

0.021
0.000
1.867

0.011
0.011
2.187

0.021
0.011
1.910

0.032
0.021
2.902

Data from rain event on 6/27/2010.

56

0.043
0.021
3.052

0.043
0.021
2.966

0.021
0.000
6.263

0.011
0.011
6.018

0.021
0.011
7.149

0.000
0.000
5.708

0.011
0.000
5.548

0.000
0.011
5.933

Table 21.

media
media
media
sedum sedum
sedum grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
7/5/2010 6:00
0.508
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/5/2010 7:00
0.254
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.203 0.256
0.256
0.128
0.107
0.149
7/5/2010 8:00
0
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.341 0.331
0.384
0.373
0.331
0.384
7/5/2010 9:00
0
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.000
7/5/2010 10:00
0
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.224 0.224
0.235
0.192
0.181
0.192
7/5/2010 11:00
0
0.011
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011 0.011
0.000
0.011
0.011
0.021
7/5/2010 12:00
0
0.000
0.011
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.011
0.000
0.762
0.011
0.011
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.790 0.832
0.875
0.704
0.640
0.747
Totals (mm)

Data from rain event on 7/5/2010.

57

Table 22.

media
media
media
sedum
sedum
sedum grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
7/8/2010 8:00
1.016
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/8/2010 9:00
0.254
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/8/2010 10:00
0
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.043 0.096
0.085
0.011
0.000
0.000
7/8/2010 11:00
0
0.011
0.021
0.011
0.000
0.000 0.000 0.000 0.000 0.000 1.014 0.950
0.992
0.875
0.832
0.960
7/8/2010 12:00
0
0.011
0.011
0.000
0.000
0.000 0.011 0.011 0.000 0.000 0.277 0.245
0.256
0.267
0.235
0.277
7/8/2010 13:00
0
0.000
0.000
0.011
0.000
0.000 0.000 0.000 0.000 0.000 0.107 0.117
0.117
0.096
0.085
0.107
7/8/2010 14:00
0
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.021 0.011
0.011
0.000
0.021
0.000
7/8/2010 15:00
0
0.000
0.000
0.000
0.000
0.000 0.011 0.000 0.000 0.000 0.000 0.000
0.000
0.011
0.000
0.000
1.27 0.02134 0.03201 0.02134
0
0 0.0213 0.0107
0
0 1.4618 1.4191 1.46179 1.25906
1.1737 1.34442
Totals (mm)

Data from rain event on 7/8/2010.

58

Table 23.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
7/12/2010 4:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/12/2010 5:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/12/2010 6:00
0.254
0.032
0.043
0.000
0.000
0.000
0.011 0.011 0.000 0.000 2.550 2.539
2.561
2.465
2.369
2.401
7/12/2010 7:00
0.254
0.000
0.000
0.000
0.021
0.000
0.000 0.000 0.000 0.011 0.032 0.021
0.021
0.011
0.032
0.032
7/12/2010 8:00
0.508
0.000
0.000
0.000
0.000
0.011
0.000 0.000 0.000 0.000 0.000 0.000
0.011
0.000
0.011
0.011
7/12/2010 9:00
0.762
0.000
0.000
0.000
0.000
0.000
0.011 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.011
7/12/2010 10:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.000
0.000
0.000
0.000
7/12/2010 11:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.011
0.000
3.048
0.032
0.043
0.000
0.021
0.011
0.021 0.011 0.000 0.011 2.603 2.571
2.593
2.475
2.422
2.454
Totals (mm)

Data from rain event on 7/12/2010.

59

Table 24.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
7/14/2010 23:00
0.508
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7/15/2010 0:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/15/2010 1:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.203 0.224
0.235
0.117
0.053
0.117
7/15/2010 2:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.544 0.501
0.544
0.469
0.491
0.534
7/15/2010 3:00
0
0.011
0.011
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.117 0.128
0.139
0.096
0.085
0.107
7/15/2010 4:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.011
0.000
0.011
0.011
7/15/2010 5:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.171 0.171
0.192
0.117
0.107
0.160
7/15/2010 6:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.011
0.011
0.011
0.011
7/15/2010 7:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.011
0.000
7/15/2010 8:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.694 0.672
0.800
0.534
0.576
0.619
7/15/2010 9:00
0
0.000
0.011
0.000
0.000
0.000
0.000 0.011 0.000 0.000 0.587 0.544
0.598
0.566
0.534
0.587
7/15/2010 10:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.043 0.032
0.043
0.032
0.032
0.032
2.54 0.01067 0.02134
0
0
0
0 0.0107
0
0 2.3794 2.2941 2.57147 1.94194 1.90993 2.17668
Totals (mm)

Data from rain event on 7/14/2010.

60

Table 25.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
7/20/2010 3:00
2.032
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/20/2010 4:00
1.778
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/20/2010 5:00
1.778
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/20/2010 6:00
0.254
0.021
0.032
0.000
0.000
0.000
0.011 0.011 0.000 0.000 1.857 1.803
1.867
1.750
1.568
1.782
7/20/2010 7:00
0
0.630
0.448
0.491
0.085
0.064
0.160 0.192 0.128 0.213 3.030 2.977
3.052
3.009
2.881
3.180
7/20/2010 8:00
0
0.768
0.790
0.896
0.203
0.149
0.363 0.331 0.267 0.160 0.053 0.053
0.043
0.043
0.053
0.064
7/20/2010 9:00
0
0.192
0.192
0.288
0.075
0.139
0.096 0.096 0.107 0.032 0.021 0.011
0.021
0.011
0.000
0.011
7/20/2010 10:00
0
0.085
0.107
0.149
0.021
0.053
0.021 0.021 0.053 0.011 0.021 0.011
0.021
0.000
0.021
0.011
7/20/2010 11:00
0
0.043
0.075
0.096
0.021
0.032
0.011 0.021 0.032 0.032 0.000 0.021
0.011
0.000
0.000
0.011
7/20/2010 12:00
0
0.032
0.043
0.064
0.011
0.011
0.000 0.000 0.011 0.011 0.011 0.000
0.000
0.000
0.000
0.011
7/20/2010 13:00
0
0.011
0.043
0.043
0.011
0.011
0.000 0.011 0.011 0.000 0.000 0.000
0.000
0.011
0.000
0.000
7/20/2010 14:00
0
0.000
0.011
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
5.842 1.78189 1.73921
2.0273
0.4268 0.45881 0.66154 0.6829 0.6082 0.4588 4.9936 4.8762
5.0149 4.82284 4.52408 5.06825
Totals (mm)

Data from rain event on 7/20/2010.

61

Table 26.

media
media
media
sedum
sedum
sedum
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
7/22/2010 16:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000
7/22/2010 17:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000
7/22/2010 18:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000
7/22/2010 19:00
1.27
0.011
0.021
0.011
0.000
0.000
0.000
7/22/2010 20:00
2.286
0.000
0.000
0.000
0.000
0.000
0.000
7/22/2010 21:00
3.302
0.032
0.043
0.021
0.011
0.011
0.021
7/22/2010 22:00
3.556
0.341
0.085
0.085
0.053
0.075
0.053
7/22/2010 23:00
3.048 11.161
8.835
9.688
6.274
6.637
8.845
7/23/2010 0:00
3.048 20.935 19.067
20.657
17.211
18.587
20.369
7/23/2010 1:00
2.794
7.000
6.519
7.064
4.609
5.538
5.826
7/23/2010 2:00
2.54
2.166
1.803
1.953
1.568
1.622
1.782
7/23/2010 3:00
2.286
2.059
1.953
2.081
1.451
1.462
1.601
7/23/2010 4:00
2.032
0.800
0.758
0.800
0.683
0.726
0.736
7/23/2010 5:00
1.778
0.427
0.416
0.448
0.373
0.416
0.373
7/23/2010 6:00
1.524
0.288
0.224
0.299
0.235
0.267
0.245
7/23/2010 7:00
1.524
0.203
0.203
0.203
0.149
0.181
0.171
7/23/2010 8:00
1.016
0.149
0.149
0.160
0.117
0.128
0.107
7/23/2010 9:00
1.27
0.139
0.128
0.117
0.075
0.107
0.085
7/23/2010 10:00
0.762
0.107
0.107
0.107
0.053
0.075
0.053
7/23/2010 11:00
1.016
0.085
0.085
0.085
0.053
0.064
0.043
7/23/2010 12:00
0.508
0.085
0.064
0.064
0.043
0.043
0.021
7/23/2010 13:00
0.508
0.053
0.053
0.053
0.032
0.032
0.011
7/23/2010 14:00
0.254
0.043
0.053
0.043
0.011
0.032
0.011
7/23/2010 15:00
0
0.043
0.032
0.032
0.011
0.011
0.000
7/23/2010 16:00
0
0.043
0.021
0.011
0.000
0.011
0.000
7/23/2010 17:00
0
0.021
0.021
0.011
0.000
0.011
0.000
Totals (mm) 37.846 46.1904 40.642 43.9924 33.01298 36.03259 40.35394

Data from rain event on 7/22/2010.

62

grass
grass
(1)
(2)
0.000 0.000
0.000 0.000
0.000 0.000
0.000 0.000
0.011 0.000
0.011 0.000
0.064 0.021
7.554 7.053
20.156 20.422
5.676 5.612
1.633 1.622
1.675 1.686
0.726 0.768
0.395 0.437
0.192 0.267
0.149 0.192
0.117 0.139
0.085 0.107
0.075 0.085
0.043 0.053
0.032 0.043
0.021 0.021
0.011 0.011
0.000 0.000
0.000 0.000
0.011 0.000
38.636 38.54

grass
(3)
0.000
0.000
0.000
0.000
0.000
0.000
0.000
7.373
16.432
4.748
1.387
1.440
0.630
0.363
0.224
0.160
0.117
0.085
0.064
0.043
0.032
0.032
0.011
0.011
0.000
0.011
33.162

steel
(1)
0.000
0.000
0.107
0.480
0.181
1.376
3.094
11.705
15.151
3.276
0.032
1.654
0.011
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
37.078

steel
shingle
shingle
shingle
(2)
steel (3) (1)
(2)
(3)
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.160
0.171
0.032
0.043
0.032
0.416
0.480
0.437
0.416
0.405
0.213
0.224
0.149
0.128
0.160
1.334
1.440
1.312
1.206
1.248
3.094
3.158
3.052
2.838
3.073
11.620
11.353
11.118
10.617
11.812
15.237
14.895
14.735
13.604
15.194
3.244
3.180
3.052
2.913
3.318
0.032
0.032
0.021
0.032
0.043
1.686
1.633
1.590
1.472
1.729
0.011
0.011
0.000
0.011
0.021
0.000
0.011
0.011
0.011
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
37.057 36.58743 35.50976 33.30107 37.05691

Table 27.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
7/28/2010 3:00
2.54
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/28/2010 4:00
1.27
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/28/2010 5:00
0
0.011
0.011
0.000
0.000
0.000
0.000 0.000 0.000 0.032 0.651 0.704
0.758
0.491
0.576
0.576
7/28/2010 6:00
0
1.035
0.395
0.566
0.032
0.064
0.064 0.032 0.011 0.053 3.564 3.895
3.660
3.457
2.774
3.244
7/28/2010 7:00
0
0.363
0.437
0.416
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.011
0.011
0.011
0.011
7/28/2010 8:00
0
0.139
0.235
0.213
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.011
0.000
7/28/2010 9:00
0
0.075
0.149
0.128
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.011
0.000
0.011
7/28/2010 10:00
0
0.043
0.096
0.085
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/28/2010 11:00
0
0.043
0.064
0.064
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.011
0.000
0.000
0.011
7/28/2010 12:00
0
0.011
0.043
0.032
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.011
0.000
7/28/2010 13:00
0
0.021
0.032
0.021
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/28/2010 14:00
0
0.011
0.021
0.021
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
3.81 1.74988 1.48313 1.54715 0.03201 0.06402 0.06402 0.032 0.0107 0.0854 4.236 4.6094 4.43872 3.96924 3.38239 3.85187
Totals (mm)

Data from rain event on 7/28/2010.

63

Table 28.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
7/31/2010 7:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/31/2010 8:00
1.778
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.000
7/31/2010 9:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/31/2010 10:00
0
0.021
0.032
0.011
0.000
0.000
0.000 0.011 0.000 0.000 1.462 1.451
1.579
1.440
1.323
1.334
7/31/2010 11:00
0.254
0.021
0.032
0.011
0.011
0.021
0.032 0.021 0.000 0.000 1.280 1.163
1.344
1.227
1.227
1.302
7/31/2010 12:00
0.254
0.000
0.011
0.011
0.000
0.000
0.000 0.000 0.000 0.000 0.224 0.203
0.267
0.235
0.224
0.245
7/31/2010 13:00
0
0.011
0.000
0.000
0.000
0.011
0.000 0.011 0.000 0.000 0.021 0.021
0.011
0.011
0.011
0.011
7/31/2010 14:00
0
0.011
0.000
0.000
0.011
0.000
0.000 0.000 0.000 0.000 0.075 0.096
0.107
0.043
0.053
0.064
7/31/2010 15:00
0
0.075
0.011
0.011
0.000
0.000
0.011 0.000 0.000 0.000 0.235 0.203
0.245
0.203
0.213
0.213
7/31/2010 16:00
0.254
0.053
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.021 0.011
0.011
0.021
0.011
0.011
7/31/2010 17:00
1.27
0.053
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.011
0.011
7/31/2010 18:00
0
0.021
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.011
0.000
7/31/2010 19:00
0
0.053
0.021
0.011
0.011
0.011
0.011 0.021 0.000 0.000 0.587 0.576
0.598
0.448
0.395
0.395
7/31/2010 20:00
0
0.235
0.032
0.160
0.011
0.021
0.032 0.021 0.021 0.000 1.067 0.982
1.163
0.950
0.992
1.078
7/31/2010 21:00
0
0.309
0.021
0.309
0.000
0.000
0.011 0.000 0.000 0.000 0.043 0.032
0.032
0.032
0.053
0.043
7/31/2010 22:00
0
0.192
0.160
0.213
0.000
0.000
0.000 0.011 0.000 0.000 0.000 0.000
0.000
0.011
0.000
0.000
7/31/2010 23:00
0
0.107
0.128
0.128
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.011
0.000
8/1/2010 0:00
0
0.064
0.075
0.085
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/1/2010 1:00
0
0.053
0.053
0.053
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.011
0.000
0.000
0.000
8/1/2010 2:00
0
0.021
0.043
0.053
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.000
8/1/2010 3:00
0
0.021
0.032
0.021
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/1/2010 4:00
0
0.021
0.021
0.021
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.011
8/1/2010 5:00
0
0.011
0.021
0.011
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/1/2010 6:00
0
0.021
0.011
0.021
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.011
0.000
8/1/2010 7:00
0
0.021
0.011
0.011
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
5.080
1.398
0.715
1.142
0.043
0.064
0.096 0.096 0.021 0.000 5.026 4.759
5.367
4.620
4.545
4.716
Totals (mm)

Data from rain event on 7/31/2010.

64

Table 29.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
8/6/2010 4:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/6/2010 5:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/6/2010 6:00
0.508
0.032
0.032
0.011
0.000
0.000
0.011 0.011 0.000 0.000 1.665 1.590
1.718
1.568
1.430
1.526
8/6/2010 7:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.032 0.021
0.032
0.032
0.032
0.043
8/6/2010 8:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.011 0.000 0.000 0.011 0.011
0.021
0.011
0.011
0.021
1.778
0.032
0.032
0.011
0.000
0.000
0.011 0.021 0.000 0.000 1.707 1.622
1.771
1.611
1.472
1.590
Totals (mm)

Data from rain event on 8/6/2010.

65

Table 30.

media
media
media
sedum
sedum
sedum
grass
grass
grass
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
8/8/2010 0:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/8/2010 1:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/8/2010 2:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/8/2010 3:00
0
0.011
0.011
0.011
0.000
0.000
0.000 0.000 0.000 0.000
8/8/2010 4:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/8/2010 5:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/8/2010 6:00
2.286
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/8/2010 7:00
2.54
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/8/2010 8:00
2.032
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/8/2010 9:00
1.778
9.144
8.099
7.640
7.448
8.643
8.088 6.637 1.291 7.341
8/8/2010 10:00
1.27
4.663
3.980
3.756
2.742
2.924
2.913 2.881 0.907 2.710
8/8/2010 11:00
1.016
1.387
1.088
1.014
0.747
0.822
0.768 0.779 0.587 0.704
8/8/2010 12:00
1.016
0.640
0.491
0.491
0.288
0.352
0.320 0.363 0.437 0.288
8/8/2010 13:00
0.762
0.373
0.277
0.288
0.139
0.203
0.171 0.192 0.277 0.139
8/8/2010 14:00
0.508
0.224
0.181
0.192
0.064
0.139
0.085 0.085 0.171 0.075
8/8/2010 15:00
0.508
0.171
0.117
0.096
0.043
0.075
0.032 0.043 0.096 0.032
8/8/2010 16:00
0.508
0.107
0.053
0.053
0.021
0.043
0.011 0.011 0.043 0.021
8/8/2010 17:00
0.508
0.085
0.032
0.011
0.000
0.011
0.000 0.000 0.043 0.000
8/8/2010 18:00
0.254
0.043
0.000
0.000
0.000
0.000
0.000 0.000 0.021 0.000
8/8/2010 19:00
0.254
0.021
0.011
0.000
0.000
0.000
0.000 0.000 0.021 0.000
8/8/2010 20:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.021 0.000
8/8/2010 21:00
0
0.011
0.000
0.011
0.000
0.000
0.000 0.000 0.021 0.000
8/8/2010 22:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.021 0.000
8/8/2010 23:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.011 0.000
8/9/2010 0:00
0
0.000
0.000
0.000
0.000
0.011
0.000 0.000 0.011 0.000
13.562
11.492
13.220
12.388 10.990 3.980 11.310
Totals (mm) 16.510 16.891 14.340

Data from rain event on 8/8/2010.

66

steel
(1)
0.000
0.000
0.000
1.131
0.043
0.011
0.000
0.000
0.011
11.684
1.921
0.096
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
14.917

steel
shingle
shingle
shingle
(2)
steel (3) (1)
(2)
(3)
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
1.142
1.216
1.078
0.992
1.056
0.032
0.043
0.032
0.032
0.032
0.011
0.011
0.000
0.011
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
11.641
11.790
10.371
9.656
12.014
1.910
1.985
1.857
1.590
2.113
0.096
0.107
0.064
0.032
0.075
0.011
0.011
0.000
0.000
0.021
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
14.842
15.173
13.412
12.313
15.322

Table 31.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
8/11/2010 18:00
2.54
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.011 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/11/2010 19:00
2.54
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.011 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/11/2010 20:00
1.778
0.053
0.043
0.032
0.011
0.043
0.043 0.043 0.011 0.000 1.014 1.067
1.142
0.822
0.832
0.843
8/11/2010 21:00
1.524 10.137
2.646
8.632
5.420
5.836
6.306 5.612 0.011 6.039 9.368 9.336
9.454
7.842
8.483
9.027
8/11/2010 22:00
1.016
2.273
1.504
1.942
1.302
1.419
1.270 1.366 0.000 1.355 0.608 0.587
0.619
0.534
0.512
0.608
8/11/2010 23:00
0.762
0.907
1.142
0.822
0.512
0.683
0.534 0.566 0.011 0.544 0.011 0.000
0.011
0.011
0.011
0.011
8/12/2010 0:00
0.508
0.534
0.918
0.437
0.245
0.341
0.256 0.288 0.000 0.256 0.000 0.000
0.000
0.000
0.000
0.000
8/12/2010 1:00
0.508
0.320
0.566
0.256
0.139
0.181
0.160 0.149 0.000 0.139 0.000 0.000
0.000
0.000
0.000
0.000
8/12/2010 2:00
0.508
0.224
0.181
0.171
0.075
0.128
0.096 0.107 0.000 0.085 0.011 0.011
0.000
0.000
0.000
0.000
8/12/2010 3:00
0
0.160
0.117
0.107
0.053
0.085
0.053 0.064 0.011 0.053 0.000 0.000
0.000
0.000
0.000
0.000
8/12/2010 4:00
0
0.139
0.085
0.096
0.043
0.053
0.043 0.053 0.000 0.032 0.000 0.000
0.000
0.000
0.000
0.000
8/12/2010 5:00
0
0.107
0.053
0.064
0.021
0.043
0.032 0.032 0.000 0.011 0.000 0.000
0.000
0.000
0.011
0.000
8/12/2010 6:00
0
0.085
0.053
0.053
0.043
0.021
0.021 0.011 0.000 0.011 0.000 0.000
0.000
0.000
0.000
0.000
8/12/2010 7:00
0
0.085
0.032
0.043
0.021
0.021
0.011 0.011 0.000 0.011 0.000 0.000
0.000
0.000
0.000
0.000
8/12/2010 8:00
0
0.064
0.032
0.032
0.021
0.011
0.011 0.011 0.000 0.011 0.000 0.011
0.011
0.000
0.000
0.000
8/12/2010 9:00
0
0.053
0.032
0.021
0.011
0.000
0.000 0.000 0.000 0.000 0.011 0.032
0.000
0.000
0.000
0.000
8/12/2010 10:00
0
0.043
0.021
0.021
0.011
0.011
0.000 0.011 0.011 0.011 0.021 0.021
0.011
0.011
0.000
0.000
8/12/2010 11:00
0
0.043
0.011
0.021
0.011
0.000
0.000 0.000 0.000 0.000 0.021 0.011
0.021
0.011
0.011
0.011
8/12/2010 12:00
0
0.053
0.021
0.021
0.011
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.011
0.000
0.000
0.000
8/12/2010 13:00
0
0.043
0.011
0.011
0.000
0.000
0.011 0.000 0.000 0.000 0.000 0.000
0.000
0.011
0.000
0.000
8/12/2010 14:00
0
0.043
0.011
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/12/2010 15:00
0
0.032
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/12/2010 16:00
0
0.021
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/12/2010 17:00
0
0.021
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.000
Totals (mm) 11.684 15.4395 7.47967 12.78266 7.94915 8.87744 8.84543 8.3226 0.0747 8.5573 11.075 11.086 11.27819 9.24022 9.85908 10.49928

Data from rain event on 8/11/2010.

67

Table 32.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
8/14/2010 4:00
1.524
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
8/14/2010 5:00
1.524
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.011 0.000 0.000 0.000 0.000
0.000
0.000
0.000
8/14/2010 6:00
1.524
0.053
0.021
0.021
0.032
0.032
0.043 0.043 0.021 0.000 2.091 2.273 2.070
2.038
1.793
1.974
8/14/2010 7:00
1.27
0.203
0.064
0.021
0.011
0.011
0.011 0.000 0.011 0.000 0.139 0.085 0.107
0.267
0.128
0.139
8/14/2010 8:00
1.016
2.860
0.224
1.099
0.064
0.117
0.416 0.267 0.011 0.256 5.143 5.068 5.175
4.972
4.631
5.068
8/14/2010 9:00
0.762
1.462
0.427
2.177
1.238
1.238
1.312 1.248 0.011 1.142 0.021 0.021 0.011
0.021
0.011
0.021
8/14/2010 10:00
0.508
0.598
0.320
0.694
0.534
0.672
0.534 0.544 0.011 0.544 0.011 0.000 0.011
0.000
0.000
0.011
8/14/2010 11:00
0.254
0.373
0.256
0.384
0.288
0.395
0.288 0.309 0.011 0.309 0.000 0.011 0.000
0.000
0.011
0.000
8/14/2010 12:00
0
0.267
0.235
0.267
0.181
0.256
0.192 0.203 0.011 0.203 0.011 0.000 0.011
0.000
0.000
0.011
8/14/2010 13:00
0
0.192
0.224
0.181
0.128
0.171
0.128 0.128 0.032 0.149 0.000 0.000 0.000
0.000
0.000
0.000
8/14/2010 14:00
0
0.160
0.203
0.128
0.075
0.117
0.085 0.085 0.032 0.075 0.000 0.000 0.000
0.000
0.000
0.000
8/14/2010 15:00
0
0.128
0.192
0.064
0.043
0.064
0.053 0.021 0.032 0.021 0.000 0.000 0.000
0.000
0.000
0.000
8/14/2010 16:00
0
0.085
0.160
0.011
0.021
0.021
0.021 0.000 0.032 0.000 0.000 0.000 0.000
0.000
0.000
0.000
8/14/2010 17:00
0
0.053
0.128
0.000
0.011
0.000
0.000 0.000 0.032 0.011 0.000 0.011 0.000
0.011
0.000
0.000
8/14/2010 18:00
0
0.043
0.117
0.000
0.000
0.000
0.000 0.000 0.043 0.000 0.000 0.000 0.000
0.000
0.000
0.011
8/14/2010 19:00
0
0.021
0.096
0.000
0.000
0.000
0.000 0.000 0.032 0.000 0.000 0.000 0.000
0.000
0.000
0.000
8/14/2010 20:00
0
0.011
0.085
0.000
0.000
0.000
0.000 0.000 0.043 0.000 0.011 0.000 0.000
0.000
0.000
0.000
8/14/2010 21:00
0
0.011
0.085
0.000
0.000
0.000
0.000 0.000 0.053 0.000 0.000 0.000 0.000
0.000
0.000
0.000
8/14/2010 22:00
0
0.000
0.064
0.000
0.000
0.000
0.000 0.000 0.053 0.000 0.000 0.000 0.000
0.000
0.000
0.000
8/14/2010 23:00
0
0.000
0.064
0.000
0.000
0.000
0.000 0.000 0.053 0.000 0.000 0.000 0.000
0.000
0.000
0.000
8/15/2010 0:00
0
0.000
0.064
0.000
0.000
0.000
0.000 0.011 0.085 0.000 0.000 0.000 0.000
0.000
0.000
0.000
8.382
6.519
3.030
5.047
2.625
3.094
3.084 2.860 0.619 2.710 7.426 7.469 7.384
7.309
6.573
7.234
Totals (mm)

Data from rain event on 8/14/2010.

68

Table 33.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
8/19/2010 9:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/19/2010 10:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.160 0.160
0.160
0.085
0.064
0.096
8/19/2010 11:00
0.254
0.021
0.043
0.000
0.000
0.000
0.011 0.011 0.000 0.000 1.686 1.825
1.782
1.782
1.568
1.686
8/19/2010 12:00
0.254
0.011
0.011
0.011
0.011
0.000
0.011 0.000 0.000 0.000 0.491 0.448
0.469
0.480
0.459
0.534
8/19/2010 13:00
0.254
0.000
0.011
0.000
0.000
0.011
0.011 0.011 0.011 0.000 0.128 0.117
0.128
0.117
0.085
0.117
8/19/2010 14:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.000
0.000
0.000
0.000
8/19/2010 15:00
0.254
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/19/2010 16:00
0
0.000
0.000
0.000
0.000
0.011
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.011
0.000
2.286
0.043
0.064
0.011
0.011
0.021
0.032 0.021 0.011 0.000 2.475 2.561
2.539
2.465
2.187
2.433
Totals (mm)

Data from rain event on 8/19/2010.

69

Table 34.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
9/6/2010 13:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/6/2010 14:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/6/2010 15:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/6/2010 16:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.171 0.213
0.235
0.085
0.117
0.107
9/6/2010 17:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.032 0.011
0.011
0.000
0.011
0.000
9/6/2010 18:00
1.27
0.000
0.011
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.149 0.171
0.192
0.075
0.053
0.075
9/6/2010 19:00
0
0.053
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.523 0.491
0.512
0.427
0.395
0.437
9/6/2010 20:00
0
0.043
0.000
0.011
0.000
0.000
0.000 0.000 0.000 0.000 0.139 0.149
0.160
0.032
0.021
0.053
9/6/2010 21:00
0
0.171
0.064
0.139
0.000
0.000
0.000 0.000 0.000 0.000 1.152 1.088
1.163
1.046
0.960
1.142
9/6/2010 22:00
0.508
0.203
0.192
0.213
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.021
0.011
0.011
0.000
0.011
9/6/2010 23:00
0
0.139
0.139
0.128
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.000
9/7/2010 0:00
0
0.085
0.085
0.096
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.011
0.000
9/7/2010 1:00
0
0.117
0.117
0.117
0.000
0.000
0.000 0.000 0.000 0.000 0.320 0.331
0.352
0.224
0.213
0.245
9/7/2010 2:00
0
0.107
0.107
0.107
0.000
0.000
0.000 0.000 0.000 0.000 0.021 0.011
0.021
0.011
0.011
0.000
9/7/2010 3:00
0
0.075
0.085
0.085
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.011
9/7/2010 4:00
0
0.053
0.075
0.075
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.000
9/7/2010 5:00
0
0.053
0.053
0.053
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/7/2010 6:00
0
0.032
0.032
0.043
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
3.048
1.142
0.960
1.067
0.000
0.000
0.000 0.000 0.000 0.000 2.539 2.486
2.657
1.910
1.793
2.081
Totals (mm)

Data from rain event on 9/6/2010.

70

Table 35.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
9/7/2010 22:00
1.52
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/7/2010 23:00
2.794
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/8/2010 0:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.021 0.032
0.043
0.000
0.000
0.000
9/8/2010 1:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.032
0.053
0.000
0.000
0.021
9/8/2010 2:00
0
0.437
0.299
0.352
0.053
0.075
0.032 0.053 0.021 0.203 3.009 3.030
3.105
3.276
2.603
3.105
9/8/2010 3:00
0
0.501
0.630
0.587
0.000
0.000
0.021 0.000 0.096 0.043 0.021 0.011
0.011
0.011
0.011
0.011
9/8/2010 4:00
0
0.299
0.395
0.373
0.000
0.000
0.171 0.064 0.192 0.149 0.075 0.085
0.096
0.032
0.032
0.043
9/8/2010 5:00
0
0.192
0.256
0.245
0.021
0.117
0.149 0.107 0.149 0.128 0.011 0.000
0.000
0.000
0.000
0.011
9/8/2010 6:00
0
0.128
0.181
0.160
0.075
0.075
0.128 0.085 0.117 0.096 0.000 0.000
0.011
0.011
0.011
0.000
9/8/2010 7:00
0
0.096
0.139
0.139
0.075
0.075
0.107 0.064 0.075 0.075 0.000 0.000
0.000
0.000
0.000
0.000
9/8/2010 8:00
0
0.075
0.096
0.096
0.053
0.064
0.096 0.043 0.064 0.064 0.000 0.000
0.000
0.000
0.000
0.000
9/8/2010 9:00
0
0.053
0.064
0.064
0.043
0.053
0.064 0.043 0.053 0.043 0.000 0.000
0.000
0.000
0.000
0.000
9/8/2010 10:00
0
0.032
0.064
0.053
0.043
0.043
0.064 0.021 0.043 0.021 0.000 0.000
0.000
0.000
0.000
0.000
9/8/2010 11:00
0
0.032
0.043
0.043
0.032
0.043
0.053 0.021 0.032 0.032 0.000 0.000
0.000
0.000
0.000
0.000
9/8/2010 12:00
0
0.032
0.032
0.043
0.021
0.032
0.032 0.021 0.021 0.021 0.000 0.000
0.000
0.000
0.000
0.000
9/8/2010 13:00
0
0.021
0.032
0.021
0.011
0.032
0.043 0.000 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9/8/2010 14:00
0
0.011
0.021
0.011
0.011
0.021
0.011 0.000 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9/8/2010 15:00
0
0.021
0.021
0.021
0.021
0.011
0.021 0.000 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9/8/2010 16:00
0
0.011
0.011
0.011
0.000
0.011
0.021 0.000 0.000 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9/8/2010 17:00
0
0.011
0.011
0.011
0.011
0.011
0.011 0.011 0.000 0.000 0.000 0.032
0.032
0.000
0.000
0.000
9/8/2010 18:00
0
0.011
0.011
0.011
0.011
0.011
0.000 0.000 0.000 0.000 0.021 0.011
0.021
0.000
0.000
0.000
9/8/2010 19:00
0
0.011
0.011
0.011
0.011
0.000
0.011 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/8/2010 20:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
4.314
1.985
2.315
2.251
0.491
0.672
1.035 0.534 0.896 0.918 3.169 3.233
3.372
3.329
2.657
3.190
Totals (mm)

Data from rain event on 9/7/2010.

71

Table 36.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
9/11/2010 12:00
1.27
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/11/2010 13:00
2.794
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/11/2010 14:00
4.318
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.000
9/11/2010 15:00
2.032
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 1.067 1.056
1.184
0.982
0.939
0.907
9/11/2010 16:00
0
0.064
0.064
0.032
0.021
0.021
0.011 0.021 0.000 0.011 2.529 2.454
2.635
2.561
2.486
2.625
9/11/2010 17:00
0
1.536
1.355
1.462
0.064
0.085
0.021 0.043 0.021 0.032 4.151 4.065
4.247
4.268
4.001
4.407
9/11/2010 18:00
0
2.411
3.041
3.020
1.494
1.472
1.803 1.889 2.198 2.027 2.145 2.177
2.177
2.198
2.017
2.251
9/11/2010 19:00
0
1.152
1.408
1.430
1.398
1.483
1.376 1.302 1.376 1.312 0.053 0.043
0.043
0.021
0.032
0.043
9/11/2010 20:00
0
0.683
0.683
0.672
0.662
0.747
0.651 0.576 0.630 0.608 0.000 0.000
0.000
0.011
0.000
0.011
9/11/2010 21:00
0
0.469
0.405
0.427
0.384
0.480
0.427 0.352 0.384 0.363 0.000 0.000
0.000
0.000
0.011
0.000
9/11/2010 22:00
0
0.352
0.277
0.288
0.245
0.331
0.299 0.235 0.267 0.245 0.000 0.000
0.011
0.000
0.000
0.000
9/11/2010 23:00
0
0.267
0.192
0.213
0.192
0.245
0.203 0.171 0.192 0.181 0.000 0.000
0.000
0.000
0.000
0.000
9/12/2010 0:00
0
0.235
0.128
0.160
0.139
0.181
0.160 0.117 0.149 0.139 0.011 0.000
0.000
0.000
0.000
0.000
9/12/2010 1:00
0
0.181
0.117
0.117
0.107
0.149
0.128 0.107 0.117 0.107 0.000 0.000
0.000
0.000
0.000
0.000
9/12/2010 2:00
0
0.160
0.107
0.117
0.096
0.117
0.107 0.075 0.085 0.085 0.000 0.000
0.000
0.000
0.000
0.000
9/12/2010 3:00
0.762
0.128
0.075
0.085
0.064
0.096
0.085 0.064 0.075 0.075 0.000 0.000
0.000
0.000
0.000
0.000
9/12/2010 4:00
0
0.117
0.075
0.075
0.064
0.085
0.075 0.053 0.064 0.053 0.000 0.000
0.000
0.000
0.000
0.011
9/12/2010 5:00
0
0.096
0.064
0.064
0.043
0.075
0.053 0.043 0.053 0.053 0.000 0.021
0.021
0.000
0.000
0.000
9/12/2010 6:00
0
0.203
0.160
0.149
0.085
0.085
0.085 0.085 0.096 0.085 0.694 0.662
0.715
0.576
0.469
0.555
9/12/2010 7:00
0
0.160
0.149
0.160
0.096
0.096
0.107 0.096 0.107 0.096 0.011 0.011
0.011
0.011
0.000
0.011
9/12/2010 8:00
0
0.139
0.128
0.117
0.064
0.085
0.085 0.075 0.075 0.075 0.021 0.011
0.011
0.000
0.000
0.011
9/12/2010 9:00
0
0.128
0.107
0.107
0.064
0.085
0.085 0.053 0.075 0.075 0.000 0.011
0.011
0.011
0.000
0.011
9/12/2010 10:00
0
0.107
0.085
0.085
0.064
0.075
0.064 0.053 0.064 0.064 0.011 0.011
0.011
0.000
0.011
0.011
9/12/2010 11:00
0
0.096
0.085
0.075
0.043
0.064
0.064 0.053 0.053 0.053 0.032 0.032
0.032
0.021
0.000
0.021
9/12/2010 12:00
0
0.085
0.075
0.085
0.053
0.053
0.053 0.043 0.053 0.043 0.021 0.021
0.032
0.011
0.000
0.032
9/12/2010 13:00
0
0.085
0.075
0.075
0.043
0.053
0.053 0.032 0.043 0.043 0.011 0.011
0.011
0.011
0.000
0.011
9/12/2010 14:00
0
0.085
0.064
0.064
0.043
0.053
0.053 0.032 0.032 0.043 0.000 0.000
0.000
0.000
0.011
0.000
9/12/2010 15:00
0
0.053
0.053
0.053
0.021
0.043
0.043 0.011 0.021 0.021 0.000 0.000
0.000
0.000
0.000
0.000
9/12/2010 16:00
0
0.064
0.043
0.053
0.011
0.032
0.021 0.011 0.000 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9/12/2010 17:00
0
0.032
0.032
0.021
0.011
0.011
0.011 0.000 0.000 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9/12/2010 18:00
0
0.021
0.011
0.011
0.011
0.000
0.011 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/12/2010 19:00
0
0.021
0.011
0.011
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9.134
9.070
9.230
5.580
6.306
6.135 5.591 6.231 5.911 10.755 10.595
11.150
10.681
9.976
10.915
Totals (mm) 11.176

Data from rain event on 9/11/2010.
72

Table 37.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
9/15/2010 18:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/15/2010 19:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/15/2010 20:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/15/2010 21:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.416 0.395
0.469
0.320
0.309
0.213
9/15/2010 22:00
0
0.021
0.011
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.640 0.651
0.704
0.598
0.640
0.608
9/15/2010 23:00
0
0.000
0.011
0.000
0.000
0.011
0.000 0.000 0.000 0.000 0.107 0.096
0.096
0.075
0.096
0.085
9/16/2010 0:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.011
0.000
0.000
0.000
9/16/2010 1:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.011
0.000
9/16/2010 2:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/16/2010 3:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.085 0.085
0.096
0.000
0.011
0.000
9/16/2010 4:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.000
0.000
0.000
0.011
9/16/2010 5:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.011
0.000
0.000
0.000
9/16/2010 6:00
3.3
0.011
0.011
0.000
0.000
0.011
0.000 0.011 0.000 0.000 0.203 0.181
0.224
0.139
0.128
0.107
9/16/2010 7:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.021 0.011
0.011
0.000
0.021
0.011
9/16/2010 8:00
8.64
0.011
0.000
0.011
0.011
0.000
0.000 0.000 0.011 0.000 0.171 0.149
0.181
0.128
0.117
0.107
9/16/2010 9:00
4.57
0.021
0.021
0.032
0.032
0.032
0.011 0.011 0.000 0.011 0.672 0.608
0.704
0.630
0.619
0.598
9/16/2010 10:00
0.254
0.011
0.011
0.011
0.000
0.000
0.000 0.011 0.011 0.000 0.235 0.235
0.224
0.181
0.213
0.203
9/16/2010 11:00
0
2.017
1.590
1.985
0.277
0.384
0.171 0.299 0.213 0.608 6.925 6.850
7.021
5.847
6.263
6.882
9/16/2010 12:00
0.508
6.626
7.832
8.035
6.317
5.879
6.455 6.253 6.391 6.861 4.652 4.524
4.407
4.695
4.364
4.812
9/16/2010 13:00
0
3.393
2.796
3.180
2.742
2.956
2.710 2.582 2.785 2.668 0.245 0.213
0.224
0.192
0.224
0.256
9/16/2010 14:00
0
1.323
0.971
1.110
0.907
1.056
1.003 0.950 1.003 0.939 0.021 0.000
0.011
0.000
0.000
0.000
9/16/2010 15:00
0
0.928
0.768
0.843
0.598
0.704
0.598 0.694 0.694 0.672 1.088 1.035
1.067
0.960
0.886
1.003
9/16/2010 16:00
0
0.822
0.704
0.768
0.598
0.640
0.619 0.608 0.651 0.619 0.032 0.032
0.032
0.021
0.032
0.032
9/16/2010 17:00
0
0.566
0.459
0.501
0.416
0.512
0.469 0.416 0.427 0.405 0.011 0.011
0.000
0.000
0.000
0.000
9/16/2010 18:00
0
0.416
0.309
0.352
0.309
0.352
0.331 0.277 0.320 0.277 0.000 0.000
0.000
0.000
0.011
0.000
9/16/2010 19:00
0
0.299
0.213
0.245
0.203
0.256
0.224 0.181 0.224 0.192 0.000 0.000
0.000
0.011
0.000
0.000
9/16/2010 20:00
0
0.235
0.149
0.171
0.149
0.192
0.160 0.128 0.160 0.139 0.000 0.000
0.000
0.000
0.000
0.000
9/16/2010 21:00
0
0.181
0.096
0.107
0.107
0.139
0.117 0.085 0.096 0.085 0.000 0.000
0.000
0.000
0.000
0.000
9/16/2010 22:00
0
0.139
0.075
0.085
0.075
0.107
0.085 0.064 0.085 0.064 0.000 0.000
0.000
0.000
0.000
0.000
9/16/2010 23:00
0
0.117
0.053
0.075
0.053
0.096
0.064 0.043 0.053 0.043 0.000 0.000
0.000
0.000
0.000
0.000
9/17/2010 0:00
0
0.085
0.043
0.053
0.043
0.064
0.053 0.032 0.043 0.032 0.000 0.000
0.000
0.000
0.000
0.000
9/17/2010 1:00
0
0.085
0.032
0.043
0.043
0.064
0.043 0.021 0.021 0.032 0.000 0.000
0.000
0.000
0.000
0.000
9/17/2010 2:00
0
0.064
0.032
0.032
0.032
0.053
0.043 0.011 0.032 0.021 0.000 0.000
0.000
0.000
0.000
0.000
9/17/2010 3:00
0
0.053
0.021
0.021
0.032
0.043
0.032 0.011 0.021 0.021 0.000 0.000
0.000
0.000
0.000
0.000
9/17/2010 4:00
0
0.053
0.021
0.032
0.021
0.032
0.021 0.011 0.011 0.021 0.000 0.000
0.000
0.000
0.000
0.000
9/17/2010 5:00
0
0.043
0.021
0.021
0.032
0.032
0.021 0.021 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
73

Table 37 (cont’d)

9/17/2010 6:00
9/17/2010 7:00
9/17/2010 8:00
9/17/2010 9:00
9/17/2010 10:00
9/17/2010 11:00
9/17/2010 12:00
Totals (mm)

0
0
0
0
0
0
0
19.304

0.043
0.043
0.032
0.032
0.021
0.032
0.021
17.744

0.011
0.011
0.021
0.011
0.011
0.000
0.011
16.325

0.021
0.021
0.011
0.021
0.011
0.011
0.011
17.819

0.021
0.021
0.021
0.021
0.011
0.011
0.021
13.124

0.032
0.021
0.021
0.021
0.021
0.011
0.011
13.754

0.021 0.000 0.011 0.021 0.000 0.000
0.021 0.011 0.011 0.011 0.000 0.000
0.011 0.011 0.011 0.011 0.000 0.000
0.011 0.000 0.000 0.011 0.000 0.000
0.011 0.021 0.011 0.011 0.000 0.000
0.011 0.000 0.011 0.011 0.000 0.000
0.011 0.000 0.000 0.011 0.000 0.000
13.327 12.761 13.316 13.807 15.557 15.098

Data from rain event on 9/15/2010.

74

0.000
0.000
0.000
0.000
0.000
0.000
0.000
15.493

0.000
0.000
0.000
0.000
0.000
0.000
0.000
13.796

0.000
0.000
0.000
0.000
0.000
0.000
0.000
13.946

0.000
0.000
0.000
0.000
0.000
0.000
0.000
14.927

Table 38.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
9/18/2010 8:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/18/2010 9:00
2.286
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/18/2010 10:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/18/2010 11:00
0
0.032
0.032
0.021
0.021
0.021
0.000 0.021 0.011 0.000 0.779 0.758
0.832
0.736
0.651
0.694
9/18/2010 12:00
0
0.512
0.320
0.448
0.096
0.139
0.053 0.171 0.075 0.064 2.892 2.646
2.742
2.774
2.614
2.796
9/18/2010 13:00
0
0.662
0.651
0.619
0.128
0.053
0.139 0.331 0.320 0.277 0.277 0.224
0.235
0.203
0.171
0.213
9/18/2010 14:00
0
0.469
0.459
0.459
0.203
0.267
0.224 0.256 0.235 0.267 0.043 0.043
0.043
0.032
0.032
0.032
9/18/2010 15:00
0
0.309
0.309
0.320
0.181
0.149
0.203 0.171 0.181 0.181 0.000 0.000
0.000
0.000
0.000
0.000
9/18/2010 16:00
0
0.192
0.192
0.192
0.139
0.117
0.160 0.128 0.139 0.128 0.000 0.000
0.000
0.000
0.000
0.000
9/18/2010 17:00
0
0.128
0.128
0.128
0.096
0.096
0.107 0.075 0.085 0.075 0.000 0.000
0.000
0.000
0.000
0.000
9/18/2010 18:00
0
0.075
0.075
0.075
0.053
0.064
0.064 0.043 0.053 0.043 0.000 0.000
0.000
0.000
0.000
0.000
9/18/2010 19:00
0
0.053
0.053
0.043
0.032
0.043
0.053 0.011 0.021 0.032 0.000 0.000
0.000
0.000
0.000
0.000
9/18/2010 20:00
0
0.032
0.032
0.032
0.021
0.032
0.021 0.000 0.021 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9/18/2010 21:00
0
0.021
0.011
0.011
0.011
0.011
0.021 0.011 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/18/2010 22:00
0
0.011
0.011
0.011
0.000
0.011
0.000 0.000 0.000 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9/18/2010 23:00
0
0.011
0.011
0.000
0.021
0.011
0.011 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/19/2010 0:00
0
0.021
0.000
0.000
0.011
0.000
0.011 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
3.302
2.529
2.283
2.358
1.014
1.014
1.067 1.216 1.142 1.088 3.991 3.670
3.852
3.745
3.468
3.735
Totals (mm)

Data from rain event on 9/18/2010.

75

Table 39.

media
media
media
sedum
sedum
sedum
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
9/23/2010 4:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000
9/23/2010 5:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000
9/23/2010 6:00
2.794
0.000
0.000
0.000
0.000
0.000
0.000
9/23/2010 7:00
3.05
0.000
0.000
0.000
0.000
0.000
0.000
9/23/2010 8:00
5.588
0.011
0.021
0.000
0.000
0.000
0.000
9/23/2010 9:00
5.33
0.064
0.064
0.032
0.043
0.043
0.000
9/23/2010 10:00
17.53
0.587
0.437
0.523
0.043
0.053
0.021
9/23/2010 11:00
21.59
3.329
4.087
4.044
1.398
1.248
1.697
9/23/2010 12:00
4.318
3.308
3.799
3.873
3.702
3.767
3.606
9/23/2010 13:00
0.254 13.071 14.522
13.508
13.423
14.234
13.754
9/23/2010 14:00
0.508 26.995 26.184
25.853
24.584
26.440
24.957
9/23/2010 15:00
0 10.585
9.016
9.358
7.992
8.451
7.757
9/23/2010 16:00
1.78
3.329
2.721
2.977
2.571
2.796
2.507
9/23/2010 17:00
0.51
1.665
1.291
1.419
1.195
1.355
1.152
9/23/2010 18:00
0
1.035
0.800
0.875
0.790
0.843
0.726
9/23/2010 19:00
0
0.779
0.619
0.651
0.555
0.544
0.512
9/23/2010 20:00
0
0.704
0.587
0.630
0.491
0.512
0.491
9/23/2010 21:00
0
0.576
0.448
0.480
0.416
0.416
0.427
9/23/2010 22:00
0
0.437
0.352
0.373
0.299
0.341
0.331
9/23/2010 23:00
0
0.363
0.267
0.288
0.245
0.256
0.245
9/24/2010 0:00
0
0.288
0.213
0.235
0.171
0.213
0.203
9/24/2010 1:00
0
0.224
0.160
0.181
0.139
0.181
0.160
9/24/2010 2:00
0.25
0.181
0.139
0.149
0.107
0.139
0.128
9/24/2010 3:00
0.76
0.149
0.117
0.117
0.085
0.128
0.096
9/24/2010 4:00
0.25
0.117
0.085
0.096
0.064
0.096
0.096
9/24/2010 5:00
0
0.107
0.064
0.064
0.053
0.075
0.064
9/24/2010 6:00
0
0.139
0.107
0.128
0.043
0.075
0.064
9/24/2010 7:00
0
0.128
0.139
0.139
0.064
0.064
0.075
9/24/2010 8:00
0.254
0.117
0.117
0.117
0.043
0.075
0.053
9/24/2010 9:00
0
0.096
0.096
0.107
0.043
0.043
0.064
9/24/2010 10:00
0.762
0.075
0.085
0.075
0.043
0.043
0.053
9/24/2010 11:00
0
0.096
0.096
0.096
0.021
0.053
0.043
9/24/2010 12:00
0
0.075
0.107
0.107
0.032
0.043
0.053
9/24/2010 13:00
0
0.107
0.117
0.117
0.032
0.043
0.043
9/24/2010 14:00
0
0.181
0.224
0.213
0.075
0.075
0.085

grass
(1)
0.000
0.000
0.000
0.000
0.000
0.021
0.032
1.665
3.788
14.372
25.704
7.949
2.454
1.152
0.747
0.555
0.534
0.416
0.320
0.245
0.181
0.139
0.096
0.085
0.053
0.043
0.053
0.064
0.053
0.032
0.032
0.021
0.032
0.043
0.085

76

grass
(2)
0.000
0.000
0.000
0.000
0.000
0.021
0.011
1.771
3.820
14.276
26.142
8.003
2.465
1.163
0.779
0.566
0.555
0.448
0.331
0.256
0.192
0.149
0.117
0.085
0.064
0.043
0.064
0.075
0.053
0.053
0.032
0.043
0.032
0.043
0.107

grass
(3)
0.000
0.000
0.000
0.000
0.000
0.011
0.011
1.825
3.799
14.415
25.789
7.928
2.465
1.206
0.758
0.555
0.534
0.437
0.331
0.256
0.181
0.139
0.117
0.096
0.053
0.053
0.053
0.075
0.064
0.053
0.032
0.043
0.032
0.053
0.096

steel
(1)
0.000
0.000
0.000
0.267
0.608
2.668
2.305
5.495
4.802
16.325
20.156
4.311
0.341
0.491
0.011
0.534
0.277
0.032
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.021
0.320
0.075
0.032
0.011
0.000
0.085
0.053
0.587
0.032

steel
shingle
shingle
shingle
(2)
steel (3) (1)
(2)
(3)
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.277
0.331
0.213
0.171
0.181
0.576
0.640
0.608
0.566
0.544
2.635
2.774
2.700
2.646
2.806
2.315
2.326
2.337
2.187
2.422
5.570
5.495
5.346
4.930
5.698
5.047
4.684
4.866
4.449
5.164
16.688
16.272
14.853
14.853
16.336
20.145
20.070
20.038
16.688
20.518
4.385
4.161
4.193
2.134
4.663
0.331
0.341
0.267
0.117
0.363
0.469
0.469
0.405
0.224
0.491
0.011
0.021
0.011
0.000
0.011
0.534
0.576
0.448
0.128
0.512
0.277
0.309
0.235
0.053
0.299
0.021
0.021
0.011
0.000
0.032
0.011
0.000
0.000
0.011
0.011
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.032
0.053
0.000
0.000
0.000
0.331
0.395
0.267
0.245
0.299
0.075
0.085
0.043
0.043
0.064
0.032
0.032
0.032
0.032
0.043
0.021
0.032
0.000
0.000
0.011
0.011
0.011
0.000
0.000
0.000
0.096
0.139
0.032
0.043
0.085
0.053
0.075
0.043
0.043
0.043
0.576
0.662
0.576
0.512
0.587
0.032
0.021
0.021
0.021
0.021

Table 39 (cont’d)

9/24/2010 15:00
9/24/2010 16:00
9/24/2010 17:00
9/24/2010 18:00
9/24/2010 19:00
9/24/2010 20:00
9/24/2010 21:00
9/24/2010 22:00
9/24/2010 23:00
9/25/2010 0:00
Totals (mm)

0
0
0
0
0
0
0
0
0
0
66.290

0.107
0.064
0.043
0.032
0.021
0.011
0.021
0.000
0.011
0.000
69.227

0.149
0.096
0.075
0.053
0.032
0.021
0.011
0.011
0.000
0.011
67.541

0.139
0.096
0.075
0.032
0.032
0.021
0.011
0.000
0.000
0.011
67.242

0.053
0.032
0.021
0.021
0.011
0.021
0.000
0.011
0.000
0.011
58.941

0.064
0.032
0.032
0.011
0.021
0.011
0.000
0.011
0.000
0.000
62.825

0.075 0.053 0.064 0.064 0.000 0.000
0.064 0.021 0.032 0.032 0.011 0.000
0.043 0.000 0.011 0.011 0.011 0.011
0.032 0.000 0.011 0.011 0.000 0.000
0.021 0.000 0.000 0.000 0.000 0.000
0.011 0.011 0.000 0.000 0.000 0.000
0.011 0.000 0.000 0.000 0.000 0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.011 0.000 0.000 0.000 0.000 0.000
59.731 61.054 61.875 61.577 59.869 60.563

Data from rain event on 9/23/2010.

77

0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
60.019

0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
57.543

0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
50.096

0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
61.214

Table 40.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
10/1/2010 21:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/1/2010 22:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/1/2010 23:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/2/2010 0:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.213 0.256
0.299
0.149
0.139
0.139
10/2/2010 1:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.011 0.000 0.181 0.149
0.181
0.149
0.160
0.181
10/2/2010 2:00
0
0.021
0.021
0.032
0.021
0.021
0.011 0.011 0.021 0.000 0.662 0.619
0.640
0.608
0.587
0.587
10/2/2010 3:00
0
0.032
0.032
0.043
0.032
0.043
0.011 0.021 0.011 0.021 0.843 0.811
0.790
0.832
0.790
0.790
10/2/2010 4:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.011
0.000
0.000
0.011
10/2/2010 5:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.011
0.021
0.000
10/2/2010 6:00
0
0.000
0.000
0.000
0.011
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.000
1.524
0.053
0.053
0.075
0.064
0.064
0.021 0.032 0.043 0.021 1.921 1.846
1.921
1.750
1.697
1.707
Totals (mm)

Data from rain event on 10/1/2010.

78

Table 41.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3)
(1)
(2)
(3)
Date/Time rainfall (1)
10/21/2010 4:00
1.778
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/21/2010 5:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/21/2010 6:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.064 0.128
0.128
0.021
0.000
0.000
10/21/2010 7:00
0.254
0.064
0.064
0.053
0.064
0.043
0.011 0.043 0.021 0.032 1.878 1.761
1.835
1.857
1.558
1.654
10/21/2010 8:00
0
0.011
0.000
0.011
0.011
0.011
0.011 0.011 0.011 0.000 0.181 0.181
0.149
0.171
0.149
0.181
10/21/2010 9:00
0
0.032
0.032
0.032
0.032
0.032
0.011 0.021 0.011 0.011 0.843 0.800
0.822
0.832
0.662
0.843
10/21/2010 10:00
0
0.011
0.011
0.011
0.011
0.011
0.000 0.011 0.011 0.011 0.224 0.224
0.213
0.203
0.149
0.224
10/21/2010 11:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.032 0.043
0.043
0.032
0.021
0.043
10/21/2010 12:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.064 0.075
0.053
0.043
0.032
0.053
10/21/2010 13:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.011
0.000
0.000
0.000
10/21/2010 14:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/21/2010 15:00
0
0.000
0.011
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.363 0.363
0.416
0.267
0.235
0.277
10/21/2010 16:00
0
0.000
0.011
0.011
0.011
0.000
0.000 0.011 0.000 0.000 0.149 0.128
0.128
0.107
0.117
0.096
10/21/2010 17:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.011
0.000
0.000
0.011
10/21/2010 18:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.021
0.021
0.000
0.000
0.000
10/21/2010 19:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.000
0.000
0.011
0.011
10/21/2010 20:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.021
0.000
0.000
0.000
10/21/2010 21:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.032 0.032
0.064
0.000
0.000
0.000
10/21/2010 22:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.021
0.011
0.000
0.000
0.000
10/21/2010 23:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.000
0.000
0.000
0.000
10/22/2010 0:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
3.048
0.139
0.128
0.117
0.128
0.096
0.032 0.096 0.053 0.053 3.905 3.820
3.927
3.532
2.934
3.393
Totals (mm)

Data from rain event on 10/21/2010.

79

Table 42.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
10/23/2010 14:00
1.524
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/23/2010 15:00
3.048
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/23/2010 16:00
2.032
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/23/2010 17:00
3.556
0.021
0.032
0.011
0.011
0.011
0.000 0.000 0.000 0.000 1.440 1.419
1.590
1.419
1.323
1.291
10/23/2010 18:00
1.016
0.085
0.085
0.085
0.032
0.053
0.021 0.043 0.011 0.053 2.764 2.732
2.828
2.700
2.593
2.742
10/23/2010 19:00
1.27
0.566
1.216
1.206
0.053
0.053
0.021 0.053 0.021 0.149 2.038 2.081
2.081
1.963
1.899
1.995
10/23/2010 20:00
1.016
1.697
2.518
2.401
0.320
0.128
0.341 0.587 0.480 0.448 3.382 3.521
3.329
3.233
3.052
3.404
10/23/2010 21:00
0
1.494
1.995
2.262
1.280
1.323
1.558 1.120 1.099 1.014 1.174 1.227
1.206
1.088
1.056
1.131
10/23/2010 22:00
0
1.195
1.408
1.590
1.174
1.344
1.174 0.854 0.939 0.907 1.174 1.184
1.216
1.099
1.067
1.163
10/23/2010 23:00
0.254
1.291
1.515
1.654
1.323
1.419
1.323 1.152 1.163 1.163 1.216 1.238
1.248
1.184
1.131
1.248
10/24/2010 0:00
0.254
0.886
0.960
1.120
0.939
1.056
0.918 0.683 0.790 0.726 0.064 0.064
0.053
0.032
0.043
0.053
10/24/2010 1:00
0
0.598
0.587
0.672
0.544
0.619
0.534 0.395 0.459 0.416 0.032 0.032
0.032
0.011
0.021
0.032
10/24/2010 2:00
0
0.448
0.416
0.480
0.352
0.427
0.352 0.267 0.309 0.299 0.235 0.235
0.267
0.181
0.181
0.213
10/24/2010 3:00
0
0.373
0.352
0.395
0.267
0.320
0.288 0.203 0.235 0.235 0.181 0.149
0.181
0.139
0.149
0.160
10/24/2010 4:00
0
0.299
0.277
0.331
0.224
0.245
0.245 0.171 0.192 0.203 0.032 0.043
0.021
0.021
0.032
0.032
10/24/2010 5:00
0.254
0.245
0.235
0.267
0.181
0.213
0.203 0.139 0.149 0.149 0.011 0.011
0.011
0.011
0.000
0.021
10/24/2010 6:00
0.254
0.213
0.181
0.213
0.139
0.171
0.160 0.117 0.128 0.128 0.011 0.011
0.011
0.000
0.000
0.000
10/24/2010 7:00
0.254
0.171
0.160
0.181
0.117
0.128
0.128 0.085 0.107 0.107 0.000 0.011
0.000
0.000
0.000
0.011
10/24/2010 8:00
0
0.160
0.139
0.160
0.096
0.117
0.107 0.075 0.085 0.085 0.181 0.171
0.224
0.139
0.160
0.181
10/24/2010 9:00
0.254
0.171
0.171
0.171
0.107
0.117
0.107 0.085 0.096 0.096 0.256 0.267
0.277
0.224
0.235
0.256
10/24/2010 10:00
0
0.181
0.192
0.192
0.107
0.117
0.107 0.107 0.117 0.117 0.288 0.277
0.309
0.245
0.256
0.267
10/24/2010 11:00
0
0.181
0.192
0.192
0.117
0.128
0.139 0.117 0.128 0.117 0.075 0.043
0.043
0.032
0.053
0.064
10/24/2010 12:00
0
0.181
0.181
0.203
0.117
0.139
0.139 0.107 0.117 0.128 0.203 0.213
0.245
0.171
0.192
0.192
10/24/2010 13:00
0
0.171
0.192
0.181
0.117
0.128
0.128 0.107 0.128 0.117 0.085 0.075
0.096
0.053
0.075
0.075
10/24/2010 14:00
0
0.149
0.160
0.171
0.107
0.117
0.107 0.096 0.107 0.107 0.043 0.043
0.032
0.021
0.032
0.032
10/24/2010 15:00
0
0.139
0.139
0.160
0.096
0.107
0.117 0.085 0.085 0.085 0.011 0.011
0.000
0.011
0.011
0.011
10/24/2010 16:00
1.016
0.117
0.117
0.128
0.085
0.107
0.096 0.064 0.085 0.085 0.000 0.011
0.011
0.000
0.000
0.000
10/24/2010 17:00
0
0.117
0.107
0.117
0.075
0.096
0.075 0.064 0.064 0.064 0.000 0.000
0.000
0.000
0.000
0.000
10/24/2010 18:00
0.508
0.107
0.096
0.107
0.064
0.085
0.085 0.043 0.064 0.053 0.000 0.000
0.000
0.000
0.000
0.000
10/24/2010 19:00
1.778
0.160
0.171
0.160
0.085
0.085
0.075 0.075 0.085 0.075 0.886 0.896
0.971
0.672
0.768
0.736
10/24/2010 20:00
0
0.192
0.203
0.203
0.107
0.117
0.117 0.096 0.107 0.117 0.075 0.053
0.075
0.032
0.064
0.064
10/24/2010 21:00
0
0.171
0.203
0.192
0.107
0.117
0.117 0.096 0.096 0.107 0.491 0.491
0.566
0.416
0.469
0.480
10/24/2010 22:00
0
0.512
0.704
0.587
0.320
0.288
0.331 0.320 0.309 0.363 1.782 1.782
1.761
1.686
1.611
1.814
10/24/2010 23:00
0
0.566
0.779
0.790
0.459
0.576
0.523 0.448 0.480 0.501 0.011 0.032
0.032
0.021
0.011
0.032
10/25/2010 0:00
0
0.384
0.469
0.501
0.373
0.491
0.416 0.341 0.341 0.373 0.021 0.011
0.011
0.000
0.011
0.011
10/25/2010 1:00
0.254
0.309
0.320
0.341
0.277
0.363
0.299 0.245 0.256 0.267 0.011 0.011
0.011
0.011
0.000
0.011
80

Table 42 (cont’d)

10/25/2010 2:00
10/25/2010 3:00
10/25/2010 4:00
10/25/2010 5:00
10/25/2010 6:00
10/25/2010 7:00
10/25/2010 8:00
10/25/2010 9:00
10/25/2010 10:00
10/25/2010 11:00
10/25/2010 12:00
10/25/2010 13:00
10/25/2010 14:00
10/25/2010 15:00
10/25/2010 16:00
10/25/2010 17:00
10/25/2010 18:00
10/25/2010 19:00
10/25/2010 20:00
10/25/2010 21:00
10/25/2010 22:00
10/25/2010 23:00
10/26/2010 0:00
Totals (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
18.542

0.245
0.192
0.192
0.160
0.128
0.139
0.117
0.096
0.107
0.096
0.085
0.075
0.064
0.064
0.053
0.053
0.053
0.032
0.043
0.032
0.021
0.021
0.021
15.642

0.245
0.181
0.181
0.149
0.128
0.107
0.096
0.096
0.075
0.075
0.075
0.053
0.053
0.053
0.043
0.032
0.032
0.032
0.021
0.021
0.011
0.011
0.011
18.256

0.256
0.203
0.192
0.171
0.139
0.128
0.117
0.096
0.096
0.075
0.085
0.064
0.064
0.053
0.053
0.043
0.032
0.032
0.032
0.021
0.011
0.021
0.000
19.409

0.213
0.160
0.149
0.128
0.117
0.085
0.096
0.064
0.064
0.064
0.064
0.043
0.032
0.043
0.032
0.032
0.032
0.021
0.032
0.011
0.021
0.011
0.021
11.310

0.267
0.203
0.160
0.149
0.117
0.128
0.096
0.096
0.064
0.075
0.064
0.053
0.064
0.043
0.053
0.043
0.043
0.043
0.043
0.021
0.021
0.021
0.021
12.697

0.224
0.171
0.149
0.139
0.117
0.107
0.085
0.085
0.075
0.053
0.064
0.053
0.043
0.053
0.043
0.043
0.032
0.032
0.032
0.021
0.021
0.021
0.021
12.036

Data from rain event on 10/23/2010.

81

0.181 0.192 0.203 0.011 0.011
0.149 0.149 0.160 0.011 0.021
0.128 0.128 0.139 0.224 0.192
0.107 0.117 0.139 0.021 0.021
0.096 0.096 0.107 0.000 0.011
0.085 0.085 0.096 0.000 0.011
0.064 0.085 0.085 0.011 0.000
0.064 0.064 0.075 0.000 0.011
0.053 0.064 0.064 0.000 0.000
0.053 0.043 0.064 0.000 0.000
0.032 0.053 0.043 0.000 0.000
0.043 0.032 0.043 0.011 0.000
0.021 0.043 0.043 0.000 0.000
0.032 0.032 0.032 0.000 0.000
0.011 0.021 0.021 0.000 0.000
0.021 0.021 0.032 0.000 0.000
0.011 0.021 0.011 0.000 0.000
0.011 0.011 0.021 0.000 0.000
0.000 0.011 0.011 0.000 0.000
0.000 0.011 0.011 0.000 0.000
0.000 0.000 0.000 0.000 0.000
0.000 0.000 0.011 0.000 0.000
0.000 0.000 0.000 0.000 0.000
9.603 10.115 10.265 18.459 18.619

0.021
0.021
0.224
0.011
0.011
0.011
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
19.046

0.000
0.000
0.160
0.011
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
16.997

0.000
0.000
0.117
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
16.624

0.011
0.011
0.181
0.021
0.011
0.011
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
17.979

Table 43.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
10/26/2010 10:00
0.254
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/26/2010 11:00
0.508
0.011
0.000
0.011
0.011
0.011
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/26/2010 12:00
1.27
0.021
0.000
0.000
0.011
0.011
0.011 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/26/2010 13:00
0.508
0.011
0.011
0.011
0.000
0.000
0.000 0.000 0.000 0.000 0.160 0.171
0.235
0.096
0.117
0.075
10/26/2010 14:00
3.048
0.043
0.011
0.043
0.011
0.011
0.000 0.000 0.000 0.000 0.501 0.512
0.512
0.459
0.480
0.416
10/26/2010 15:00
0
0.213
0.181
0.192
0.043
0.053
0.043 0.011 0.043 0.032 0.971 0.950
1.035
0.864
0.960
0.971
10/26/2010 16:00
0.254
0.245
0.267
0.277
0.107
0.139
0.117 0.096 0.128 0.128 0.480 0.480
0.523
0.437
0.427
0.491
10/26/2010 17:00
0
0.747
0.886
0.886
0.363
0.288
0.320 0.320 0.288 0.341 2.177 2.230
2.209
2.177
1.985
2.326
10/26/2010 18:00
0
1.046
1.152
1.259
0.768
0.715
1.014 0.704 0.726 0.822 0.032 0.032
0.011
0.000
0.011
0.011
10/26/2010 19:00
0
0.534
0.576
0.630
0.566
0.651
0.726 0.523 0.501 0.534 0.160 0.149
0.181
0.064
0.075
0.064
10/26/2010 20:00
0
0.320
0.352
0.395
0.363
0.469
0.448 0.320 0.363 0.352 0.000 0.011
0.011
0.000
0.000
0.000
10/26/2010 21:00
0
0.213
0.203
0.235
0.267
0.331
0.299 0.203 0.245 0.224 0.000 0.011
0.000
0.000
0.000
0.000
10/26/2010 22:00
0
0.149
0.139
0.149
0.203
0.245
0.213 0.139 0.160 0.149 0.000 0.000
0.000
0.000
0.000
0.000
10/26/2010 23:00
0
0.107
0.107
0.107
0.128
0.181
0.149 0.096 0.117 0.107 0.000 0.000
0.000
0.000
0.000
0.011
10/27/2010 0:00
0
0.064
0.064
0.085
0.096
0.149
0.117 0.053 0.075 0.075 0.000 0.000
0.000
0.000
0.000
0.000
10/27/2010 1:00
0
0.064
0.053
0.043
0.085
0.096
0.085 0.043 0.064 0.053 0.000 0.000
0.000
0.000
0.000
0.000
10/27/2010 2:00
0
0.032
0.032
0.043
0.053
0.085
0.064 0.032 0.032 0.032 0.000 0.000
0.000
0.000
0.000
0.000
10/27/2010 3:00
0
0.032
0.021
0.032
0.043
0.075
0.053 0.011 0.021 0.032 0.000 0.000
0.000
0.000
0.000
0.000
10/27/2010 4:00
0
0.021
0.011
0.011
0.032
0.053
0.043 0.011 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
10/27/2010 5:00
0
0.021
0.011
0.021
0.021
0.053
0.032 0.000 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
10/27/2010 6:00
0
0.021
0.000
0.000
0.021
0.043
0.032 0.000 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
10/27/2010 7:00
0
0.011
0.011
0.011
0.011
0.032
0.032 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/27/2010 8:00
0
0.011
0.000
0.000
0.021
0.021
0.011 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/27/2010 9:00
0
0.000
0.000
0.000
0.011
0.021
0.021 0.011 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/27/2010 10:00
0
0.000
0.000
0.000
0.000
0.011
0.011 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/27/2010 11:00
0
0.000
0.000
0.000
0.011
0.011
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/27/2010 12:00
0
0.000
0.000
0.000
0.000
0.011
0.011 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
5.842
3.948
4.087
4.439
3.244
3.767
3.852 2.571 2.796 2.913 4.481 4.545
4.716
4.097
4.055
4.364
Totals (mm)

Data from rain event on 10/26/2010.

82

Table 44.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
5/10/2011 3:00
2.794
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.043 0.085
0.075
0.000
0.000
0.000
5/10/2011 4:00
0
0.032
0.043
0.011
0.032
0.021
0.000 0.011 0.000 0.000 2.262 2.198
2.358
2.294
2.017
2.038
5/10/2011 5:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.011 0.181 0.160
0.203
0.181
0.203
0.181
5/10/2011 6:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.011
0.000
0.000
0.011
5/10/2011 7:00
0.254
0.011
0.021
0.000
0.011
0.000
0.000 0.000 0.000 0.000 0.469 0.448
0.469
0.384
0.341
0.341
5/10/2011 8:00
0.508
0.107
0.000
0.000
0.011
0.000
0.000 0.000 0.000 0.000 0.256 0.245
0.267
0.245
0.245
0.235
5/10/2011 9:00
0
0.299
0.011
0.000
0.000
0.021
0.000 0.000 0.000 0.000 0.469 0.459
0.501
0.459
0.459
0.448
5/10/2011 10:00
0
0.139
0.000
0.011
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.011
0.011
5/10/2011 11:00
0
0.053
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
5/10/2011 12:00
0
0.021
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
4.064
0.662
0.075
0.021
0.053
0.043
0.000 0.011 0.000 0.011 3.702 3.596
3.884
3.564
3.276
3.265
Totals (mm)

Data from rain event on 5/10/2011.

83

Table 45.

Date/Time rainfall
5/11/2011 9:00
1.016
5/11/2011 10:00
16
5/11/2011 11:00
2.794
5/11/2011 12:00
0
5/11/2011 13:00
0
5/11/2011 14:00
0
5/11/2011 15:00
0
5/11/2011 16:00
0
5/11/2011 17:00
0
5/11/2011 18:00
0
5/11/2011 19:00
0
5/11/2011 20:00
0
5/11/2011 21:00
0
5/11/2011 22:00
0.254
5/11/2011 23:00
0
5/12/2011 0:00
0
5/12/2011 1:00
0.508
5/12/2011 2:00
0.254
5/12/2011 3:00
0
5/12/2011 4:00
0
5/12/2011 5:00
0
5/12/2011 6:00
0
5/12/2011 7:00
0
5/12/2011 8:00
0
5/12/2011 9:00
0
5/12/2011 10:00
0
5/12/2011 11:00
0
5/12/2011 12:00
0
5/12/2011 13:00
0
5/12/2011 14:00
0
5/12/2011 15:00
0
5/12/2011 16:00
0
5/12/2011 17:00
0
5/12/2011 18:00
0
Totals (mm) 20.826

media
media
media
sedum
sedum
sedum
grass
grass
grass
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
0.053
0.043
0.075
0.032
0.043
0.011 0.032 0.043 0.021
9.358
8.664
0.437
4.652
4.343
5.196 5.869 6.306 7.629
5.388
4.866
1.067
4.535
5.143
4.321 5.111 5.463 5.186
1.963
1.857
1.323
1.697
2.049
1.665 2.006 2.102 1.942
0.918
0.886
1.280
0.779
1.003
0.747 1.014 1.078 0.939
0.555
0.512
1.099
0.459
0.587
0.427 0.651 0.672 0.608
0.373
0.363
0.758
0.309
0.405
0.277 0.459 0.459 0.427
0.288
0.267
0.566
0.224
0.299
0.192 0.352 0.341 0.320
0.213
0.203
0.427
0.160
0.213
0.149 0.277 0.256 0.245
0.160
0.149
0.256
0.107
0.181
0.107 0.203 0.213 0.181
0.128
0.107
0.149
0.075
0.128
0.064 0.171 0.171 0.149
0.085
0.096
0.085
0.064
0.107
0.043 0.117 0.117 0.107
0.064
0.075
0.064
0.043
0.085
0.032 0.107 0.096 0.096
0.075
0.085
0.053
0.043
0.075
0.043 0.096 0.096 0.096
0.053
0.064
0.053
0.032
0.064
0.021 0.096 0.075 0.075
0.064
0.064
0.043
0.032
0.053
0.021 0.075 0.075 0.075
0.085
0.117
0.043
0.053
0.064
0.032 0.096 0.085 0.085
0.117
0.149
0.053
0.075
0.096
0.053 0.117 0.117 0.117
0.117
0.128
0.043
0.064
0.096
0.064 0.107 0.107 0.096
0.107
0.096
0.043
0.053
0.075
0.053 0.096 0.085 0.096
0.096
0.085
0.032
0.032
0.064
0.032 0.085 0.075 0.085
0.075
0.064
0.043
0.053
0.053
0.032 0.085 0.075 0.064
0.075
0.075
0.043
0.021
0.053
0.032 0.075 0.064 0.075
0.075
0.075
0.043
0.043
0.043
0.043 0.064 0.064 0.064
0.064
0.064
0.053
0.021
0.053
0.021 0.064 0.064 0.064
0.053
0.075
0.053
0.021
0.053
0.021 0.075 0.075 0.053
0.064
0.053
0.075
0.000
0.032
0.021 0.053 0.075 0.064
0.053
0.043
0.480
0.000
0.011
0.000 0.064 0.053 0.053
0.043
0.032
0.117
0.000
0.011
0.000 0.053 0.053 0.053
0.021
0.011
0.000
0.000
0.000
0.000 0.043 0.043 0.043
0.011
0.011
0.000
0.011
0.000
0.011 0.032 0.032 0.021
0.011
0.000
0.000
0.000
0.000
0.000 0.011 0.021 0.021
0.011
0.000
0.000
0.000
0.000
0.000 0.011 0.021 0.021
20.817 19.377
8.856
13.690
15.482
13.732 17.766 18.673 19.174

Data from rain event on 5/11/2011.
84

steel
(1)
0.000
0.992
13.935
2.518
0.085
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.181
0.021
0.117
0.427
0.213
0.053
0.032
0.011
0.011
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
18.608

steel
shingle
shingle
shingle
(2)
steel (3) (1)
(2)
(3)
0.000
0.000
0.000
0.000
0.000
0.928
1.110
1.152
1.003
0.928
13.540
13.743
12.985
12.473
12.921
2.614
2.539
2.230
2.177
2.497
0.107
0.096
0.085
0.085
0.107
0.000
0.000
0.000
0.000
0.011
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.181
0.192
0.075
0.085
0.075
0.021
0.021
0.011
0.021
0.032
0.096
0.139
0.107
0.096
0.096
0.405
0.437
0.395
0.395
0.363
0.213
0.203
0.192
0.181
0.181
0.053
0.075
0.053
0.043
0.064
0.032
0.021
0.021
0.011
0.021
0.011
0.011
0.011
0.000
0.011
0.000
0.000
0.011
0.000
0.011
0.011
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
18.224
18.608
17.328
16.581
17.317

Table 46.

Date/Time rainfall
5/19/2011 7:00
0.762
5/19/2011 8:00
0.508
5/19/2011 9:00
0
5/19/2011 10:00
0
1.270
Totals (mm)

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
0.032
0.021
0.032
0.043
0.032
0.000 0.021 0.011 0.011 0.896 0.886
0.896
0.758
0.758
0.800
0.021
0.021
0.021
0.000
0.021
0.011 0.021 0.000 0.000 0.566 0.566
0.544
0.501
0.523
0.544
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.021 0.011
0.011
0.000
0.011
0.011
0.053
0.043
0.053
0.043
0.053
0.011 0.043 0.011 0.011 1.483 1.462
1.451
1.259
1.291
1.355

Data from rain event on 5/19/2011.

85

Table 47.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
5/21/2011 21:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.117 0.117
0.160
0.043
0.000
0.011
5/21/2011 22:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.171 0.171
0.171
0.149
0.117
0.160
5/21/2011 23:00
1.016
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.256 0.224
0.267
0.235
0.192
0.245
5/22/2011 0:00
0.254
0.011
0.021
0.011
0.021
0.011
0.000 0.000 0.000 0.000 0.864 0.832
0.886
0.768
0.694
0.790
5/22/2011 1:00
0
0.011
0.011
0.011
0.000
0.011
0.000 0.011 0.000 0.000 0.320 0.331
0.331
0.288
0.256
0.320
5/22/2011 2:00
0
0.000
0.000
0.000
0.011
0.000
0.000 0.000 0.000 0.000 0.011 0.032
0.011
0.000
0.011
0.011
5/22/2011 3:00
0.254
0.000
0.011
0.000
0.000
0.011
0.000 0.011 0.000 0.011 0.160 0.149
0.171
0.149
0.128
0.160
5/22/2011 4:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.021 0.021
0.021
0.021
0.011
0.021
5/22/2011 5:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.021
0.011
0.000
0.000
0.000
5/22/2011 6:00
2.032
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.011
0.000
0.011
5/22/2011 7:00
0
0.021
0.021
0.011
0.011
0.000
0.011 0.000 0.000 0.000 1.739 1.686
1.782
1.558
1.558
1.675
5/22/2011 8:00
0.254
0.011
0.000
0.000
0.011
0.011
0.000 0.000 0.000 0.000 0.021 0.011
0.021
0.011
0.000
0.021
5/22/2011 9:00
0
0.043
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.011 0.000 0.011
0.000
0.000
0.000
0.011
5/22/2011 10:00
0
0.021
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.011
0.000
5/22/2011 11:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.000
5/22/2011 12:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.011 0.000 0.000
0.000
0.000
0.000
0.000
4.318
0.128
0.064
0.032
0.053
0.043
0.011 0.021 0.000 0.032 3.702 3.628
3.831
3.233
2.977
3.436
Totals (mm)

Data from rain event on 5/21/2011.

86

Table 48.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
5/25/2011 16:00
1.524
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.064 0.096
0.117
0.000
0.000
0.000
5/25/2011 17:00
1.016
0.043
0.043
0.000
0.032
0.032
0.000 0.021 0.000 0.021 1.472 0.992
1.515
1.366
1.291
1.195
5/25/2011 18:00
1.27
0.053
0.032
0.011
0.043
0.043
0.011 0.032 0.021 0.011 0.992 1.142
0.982
0.886
0.854
0.822
5/25/2011 19:00
1.016
0.128
0.128
0.000
0.043
0.053
0.032 0.096 0.181 0.160 1.270 1.056
1.216
1.174
1.067
1.152
5/25/2011 20:00
0
0.544
0.469
0.000
0.053
0.064
0.032 0.352 0.395 0.437 1.334 1.035
1.216
1.120
1.067
1.131
5/25/2011 21:00
2.032
0.405
0.437
0.000
0.011
0.064
0.000 0.256 0.288 0.288 0.117 0.779
0.107
0.064
0.064
0.096
5/25/2011 22:00
2.54
0.544
0.598
0.000
0.075
0.267
0.053 0.352 0.331 0.416 2.070 0.790
2.145
1.782
1.771
1.953
5/25/2011 23:00
0.762
1.814
1.729
0.096
0.598
0.822
0.544 0.960 0.928 1.195 3.244 1.387
3.372
2.796
2.657
3.116
5/26/2011 0:00
0
1.995
1.814
0.128
1.195
0.939
1.867 1.120 1.142 1.451 1.078 1.195
1.067
0.843
0.854
1.088
5/26/2011 1:00
0
1.451
1.248
0.096
1.099
1.120
1.366 1.046 1.195 1.312 0.192 1.014
0.181
0.117
0.128
0.192
5/26/2011 2:00
0
0.896
0.779
0.299
0.726
0.896
0.779 0.800 0.928 0.918 0.011 0.768
0.011
0.011
0.011
0.011
5/26/2011 3:00
0
0.598
0.534
1.750
0.512
0.651
0.501 0.598 0.694 0.630 0.011 0.534
0.011
0.000
0.000
0.011
5/26/2011 4:00
0
0.416
0.395
1.398
0.363
0.491
0.341 0.469 0.512 0.469 0.000 0.117
0.000
0.000
0.000
0.000
5/26/2011 5:00
0
0.299
0.288
0.160
0.267
0.373
0.245 0.363 0.384 0.341 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 6:00
0
0.213
0.224
0.352
0.213
0.288
0.192 0.288 0.309 0.277 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 7:00
0
0.181
0.181
0.224
0.171
0.245
0.139 0.235 0.235 0.224 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 8:00
0
0.149
0.149
0.149
0.139
0.192
0.117 0.213 0.192 0.181 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 9:00
0
0.117
0.128
0.139
0.107
0.160
0.107 0.181 0.160 0.160 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 10:00
0
0.107
0.107
0.107
0.096
0.139
0.075 0.149 0.149 0.117 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 11:00
0
0.075
0.096
0.085
0.075
0.117
0.064 0.128 0.128 0.117 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 12:00
0
0.064
0.064
0.053
0.053
0.085
0.043 0.107 0.117 0.096 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 13:00
0
0.043
0.043
0.043
0.021
0.075
0.043 0.085 0.085 0.085 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 14:00
0
0.032
0.032
0.011
0.000
0.043
0.021 0.053 0.075 0.064 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 15:00
0
0.021
0.011
0.011
0.000
0.032
0.011 0.043 0.053 0.043 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 16:00
0
0.011
0.011
0.000
0.000
0.021
0.011 0.032 0.032 0.032 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 17:00
0
0.011
0.000
0.000
0.000
0.011
0.000 0.011 0.021 0.032 0.000 0.000
0.000
0.000
0.000
0.000
5/26/2011 18:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.011 0.021 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9.539
5.111
5.890
7.224
6.594 8.003 8.579 9.091 11.854 10.905
11.940
10.158
9.763
10.766
Totals (mm) 10.160 10.211

Data from rain event on 5/25/2011.

87

Table 49.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
5/31/2011 18:00
7.112
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
5/31/2011 19:00
0.508
0.011
0.000
0.000
0.011
0.043
0.000 0.021 0.000 0.021 3.254 3.201
3.596
3.158
0.053
3.468
5/31/2011 20:00
0
0.181
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.341 0.918
0.373
0.277
0.128
0.341
5/31/2011 21:00
0
0.053
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.021
0.000
5/31/2011 22:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.011
5/31/2011 23:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.011 0.000 0.000 0.000
0.000
0.000
0.000
0.011
7.620
0.245
0.000
0.000
0.011
0.043
0.000 0.021 0.011 0.021 3.606 4.129
3.969
3.436
0.203
3.831
Totals (mm)

Data from rain event on 5/31/2011.

88

Table 50.

media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
steel
shingle
shingle
shingle
(2)
media (3) (1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
6/8/2011 8:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
6/8/2011 9:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.149 0.160 0.181
0.043
0.000
0.053
6/8/2011 10:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.021 0.043 0.032
0.000
0.000
0.000
6/8/2011 11:00
2.794
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011 0.011
0.000
0.000
0.000
6/8/2011 12:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 2.017 0.715 2.145
1.857
0.075
2.059
6/8/2011 13:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.021 0.608 0.021
0.011
0.011
0.021
6/8/2011 14:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.341 0.000
0.000
0.000
0.000
6/8/2011 15:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.096 0.235 0.117
0.011
0.000
0.011
6/8/2011 16:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.160 0.160 0.171
0.117
0.000
0.117
6/8/2011 17:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.139 0.000
0.000
0.000
0.000
6/8/2011 18:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.107 0.000
0.000
0.000
0.011
6/8/2011 19:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.075 0.000
0.000
0.000
0.000
6/8/2011 20:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.053 0.000
0.000
0.000
0.000
6/8/2011 21:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.053 0.000
0.000
0.011
0.000
6/8/2011 22:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.032 0.000
0.000
0.000
0.000
6/8/2011 23:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.021 0.000
0.000
0.000
0.000
6/9/2011 0:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.032 0.000
0.000
0.000
0.000
3.556
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 2.465 2.785 2.678
2.038
0.096
2.273
Totals (mm)

Data from rain event on 6/8/2011.

89

Table 51.

media
media
media
sedum
sedum
sedum
grass
grass
grass
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
6/11/2011 5:00
11.18
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
6/11/2011 6:00
6.858
4.055
3.574
0.160
2.732
3.180
2.742 1.729 1.216 1.697
6/11/2011 7:00
2.794
8.355
7.928
0.064
6.679
6.978
6.882 6.615 6.626 6.903
6/11/2011 8:00
0
3.884
3.841
0.064
3.329
3.468
3.489 3.617 3.468 3.628
6/11/2011 9:00
0
0.683
0.822
0.021
0.768
0.886
0.886 0.918 0.950 0.886
6/11/2011 10:00
0
0.224
0.309
0.011
0.299
0.341
0.352 0.395 0.416 0.363
6/11/2011 11:00
0
0.085
0.171
0.011
0.160
0.192
0.192 0.224 0.245 0.203
6/11/2011 12:00
0
0.043
0.096
0.011
0.096
0.128
0.117 0.128 0.160 0.128
6/11/2011 13:00
0
0.000
0.053
0.000
0.053
0.075
0.075 0.085 0.107 0.075
6/11/2011 14:00
0
0.000
0.032
0.000
0.021
0.043
0.032 0.043 0.064 0.053
6/11/2011 15:00
0
0.000
0.011
0.000
0.011
0.021
0.011 0.021 0.032 0.021
6/11/2011 16:00
0
0.000
0.000
0.000
0.000
0.011
0.000 0.000 0.021 0.011
6/11/2011 17:00
0
0.000
0.011
0.000
0.000
0.011
0.000 0.000 0.000 0.011
6/11/2011 18:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.011 0.011
0.341
14.148
15.333
14.778 13.775 13.316 13.988
Totals (mm) 20.832 17.328 16.848

Data from rain event on 6/11/2011.

90

steel
steel
(1)
(2)
0.000 0.011
10.137 0.021
6.903 0.021
3.212 0.021
0.021 0.011
0.011 0.021
0.011 0.021
0.000 0.021
0.000 0.011
0.000 0.021
0.000 0.021
0.000 0.011
0.000 0.011
0.000 0.021
20.294 0.245

steel
shingle
shingle
shingle
(3)
(1)
(2)
(3)
0.000
0.000
0.000
0.000
10.040
9.987
0.000
10.297
7.010
6.594
0.032
7.266
3.372
2.849
0.203
3.126
0.011
0.000
0.011
0.021
0.011
0.000
0.000
0.011
0.000
0.000
0.011
0.000
0.000
0.021
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
20.444
19.451
0.256
20.721

Table 52.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
6/15/2011 23:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.000
6/16/2011 0:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.822 0.011
0.907
0.704
0.000
0.608
6/16/2011 1:00
0.508
0.021
0.021
0.000
0.011
0.021
0.000 0.011 0.000 0.000 0.822 0.043
0.864
0.747
0.000
0.768
6/16/2011 2:00
1.524
0.011
0.021
0.000
0.021
0.000
0.000 0.011 0.000 0.011 0.501 0.043
0.523
0.459
0.000
0.469
6/16/2011 3:00
0
0.053
0.053
0.000
0.032
0.043
0.000 0.032 0.011 0.021 1.323 0.032
1.376
1.216
0.000
1.227
6/16/2011 4:00
0
0.000
0.000
0.000
0.011
0.000
0.000 0.000 0.000 0.000 0.053 0.032
0.032
0.021
0.000
0.032
6/16/2011 5:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.032 0.032
0.053
0.021
0.000
0.032
6/16/2011 6:00
1.27
0.011
0.021
0.000
0.011
0.011
0.011 0.000 0.000 0.000 0.598 0.032
0.576
0.534
0.000
0.523
6/16/2011 7:00
1.016
0.043
0.043
0.000
0.043
0.032
0.011 0.032 0.011 0.021 1.323 0.021
1.334
1.227
0.011
1.312
6/16/2011 8:00
0.254
0.096
0.032
0.000
0.032
0.032
0.011 0.021 0.011 0.011 1.003 0.021
1.046
0.907
0.011
0.950
6/16/2011 9:00
0.762
0.384
0.011
0.000
0.011
0.011
0.000 0.011 0.000 0.011 0.341 0.011
0.331
0.288
0.000
0.331
6/16/2011 10:00
0
0.480
0.181
0.000
0.021
0.021
0.011 0.021 0.011 0.011 0.640 0.021
0.662
0.566
0.021
0.598
6/16/2011 11:00
0
0.224
0.309
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.021 0.021
0.021
0.011
0.000
0.011
6/16/2011 12:00
0
0.085
0.181
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.000
6/16/2011 13:00
0
0.011
0.096
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.000
0.000
0.000
0.000
6/16/2011 14:00
0
0.000
0.043
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.000
7.620
1.419
1.014
0.000
0.192
0.171
0.043 0.139 0.043 0.085 7.490 0.363
7.725
6.701
0.043
6.861
Totals (mm)

Data from rain event on 6/15/2011.

91

Table 53.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
6/19/2011 11:00
0.000
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
6/20/2011 0:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
6/20/2011 1:00
3.556
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.672 0.672
0.704
0.544
0.000
0.459
6/20/2011 2:00
0
0.075
0.107
0.075
0.053
0.075
0.075 0.053 0.021 0.064 3.393 3.233
3.425
3.158
0.011
3.212
6/20/2011 3:00
0
0.011
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.053 0.053
0.064
0.021
0.000
0.053
6/20/2011 4:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.032 0.043
0.043
0.021
0.000
0.032
4.064
0.085
0.107
0.075
0.053
0.075
0.075 0.053 0.021 0.064 4.151 4.001
4.236
3.745
0.011
3.756
Totals (mm)

Data from rain event on 6/19/2011.

92

Table 54.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
6/20/2011 15:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
6/20/2011 16:00
0
0.000
0.000
0.011
0.000
0.000
0.000 0.000 0.000 0.000 0.491 0.459
0.523
0.405
0.000
0.352
6/20/2011 17:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.000
6/20/2011 18:00
0
0.000
0.011
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
6/20/2011 19:00
1.016
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
6/20/2011 20:00
0
0.011
0.021
0.011
0.000
0.011
0.000 0.000 0.000 0.000 0.843 0.811
0.918
0.736
0.000
0.704
6/20/2011 21:00
0
0.000
0.000
0.000
0.011
0.000
0.011 0.000 0.000 0.000 0.096 0.064
0.053
0.053
0.000
0.064
6/20/2011 22:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.000
0.000
0.000
0.000
6/20/2011 23:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.011
0.011
0.011
0.000
6/21/2011 0:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.032 0.043
0.053
0.000
0.000
0.021
6/21/2011 1:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.085 0.075
0.075
0.064
0.000
0.064
6/21/2011 2:00
0.254
0.000
0.011
0.011
0.000
0.000
0.000 0.000 0.000 0.000 0.203 0.192
0.224
0.192
0.000
0.203
6/21/2011 3:00
0
0.000
0.000
0.000
0.000
0.011
0.000 0.000 0.000 0.000 0.053 0.053
0.053
0.043
0.000
0.032
6/21/2011 4:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.000
0.000
0.011
0.021
2.286
0.011
0.043
0.032
0.011
0.021
0.011 0.000 0.000 0.000 1.825 1.729
1.910
1.504
0.021
1.462
Totals (mm)

Data from rain event on 6/20/2011.

93

Table 55.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
6/21/2011 10:00
3.556
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.011 0.000 0.128 0.160
0.139
0.043
0.000
0.053
6/21/2011 11:00
0
0.928
0.480
0.405
0.053
0.064
0.064 0.043 0.021 0.000 3.073 2.753
2.924
2.753
0.021
2.849
6/21/2011 12:00
0
0.566
0.608
0.555
0.000
0.000
0.000 0.000 0.011 0.000 0.021 0.011
0.011
0.000
0.000
0.011
6/21/2011 13:00
0
0.203
0.267
0.256
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.011
0.000
0.011
6/21/2011 14:00
0
0.075
0.128
0.128
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
6/21/2011 15:00
0
0.021
0.053
0.064
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
6/21/2011 16:00
0.254
0.011
0.021
0.032
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
6/21/2011 17:00
1.016
0.011
0.011
0.011
0.011
0.011
0.000 0.000 0.000 0.000 0.235 0.277
0.299
0.149
0.011
0.128
6/21/2011 18:00
0
0.256
0.203
0.203
0.032
0.032
0.032 0.032 0.032 0.000 0.822 0.683
0.715
0.726
0.000
0.704
6/21/2011 19:00
0
0.117
0.149
0.160
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.000
6/21/2011 20:00
0
0.053
0.075
0.075
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.000
6/21/2011 21:00
5.08
0.032
0.053
0.064
0.000
0.000
0.000 0.000 0.000 0.000 0.149 0.171
0.203
0.053
0.011
0.043
6/21/2011 22:00
2.032
1.558
1.483
1.238
0.043
0.075
0.096 0.053 0.011 0.032 4.695 4.385
4.524
4.311
0.011
4.791
6/21/2011 23:00
0
3.233
3.777
3.841
2.358
2.283
2.988 2.262 2.475 2.390 2.081 1.899
1.963
1.803
0.064
2.155
6/22/2011 0:00
0
0.939
0.971
0.971
0.982
1.216
1.024 1.014 1.088 1.003 0.032 0.021
0.011
0.011
0.011
0.021
6/22/2011 1:00
0
0.416
0.448
0.416
0.437
0.566
0.480 0.459 0.512 0.469 0.011 0.011
0.011
0.000
0.000
0.011
6/22/2011 2:00
1.524
0.245
0.245
0.235
0.267
0.352
0.288 0.288 0.309 0.299 0.000 0.000
0.000
0.000
0.000
0.000
6/22/2011 3:00
1.27
0.672
0.608
0.555
0.309
0.363
0.373 0.341 0.309 0.320 1.536 1.483
1.547
1.430
0.000
1.472
6/22/2011 4:00
0.254
1.035
1.078
1.035
0.640
0.726
0.694 0.726 0.576 0.683 1.142 1.035
1.099
1.046
0.000
1.067
6/22/2011 5:00
0.762
0.907
1.003
0.971
0.832
0.939
0.822 0.896 0.800 0.854 0.437 0.405
0.405
0.363
0.000
0.395
6/22/2011 6:00
0
0.672
0.715
0.683
0.651
0.758
0.651 0.630 0.619 0.619 0.662 0.630
0.651
0.587
0.000
0.640
6/22/2011 7:00
0
0.651
0.704
0.672
0.608
0.736
0.619 0.619 0.587 0.608 0.203 0.181
0.192
0.181
0.011
0.224
6/22/2011 8:00
0
0.363
0.395
0.395
0.448
0.555
0.437 0.437 0.437 0.437 0.021 0.021
0.011
0.000
0.000
0.011
6/22/2011 9:00
0
0.235
0.267
0.256
0.320
0.373
0.309 0.309 0.309 0.299 0.021 0.000
0.011
0.011
0.000
0.011
6/22/2011 10:00
0
0.171
0.181
0.181
0.213
0.267
0.224 0.213 0.224 0.235 0.000 0.011
0.000
0.000
0.011
0.011
6/22/2011 11:00
0
0.128
0.139
0.128
0.181
0.213
0.171 0.171 0.192 0.181 0.000 0.000
0.000
0.000
0.000
0.000
6/22/2011 12:00
0
0.085
0.085
0.096
0.117
0.160
0.139 0.117 0.149 0.149 0.011 0.000
0.000
0.000
0.000
0.000
6/22/2011 13:00
9.14
0.032
0.053
0.053
0.085
0.117
0.085 0.085 0.117 0.096 0.000 0.000
0.000
0.000
0.000
0.000
6/22/2011 14:00
3.556
0.736
0.576
0.491
0.320
0.299
0.267 0.171 0.160 0.373 3.222 3.542
3.265
3.062
0.000
0.939
6/22/2011 15:00
0
8.003
8.547
8.632
8.547
8.973
9.048 9.134 9.432 8.973 4.951 4.812
4.908
4.663
0.000
4.898
6/22/2011 16:00
0.254
1.387
1.366
1.387
1.440
1.697
1.430 1.451 1.718 1.355 0.021 0.011
0.021
0.011
0.000
0.021
6/22/2011 17:00
0
0.608
0.576
0.566
0.630
0.811
0.630 0.630 0.779 0.598 0.160 0.171
0.171
0.053
0.000
0.043
6/22/2011 18:00
8.64
0.331
0.341
0.320
0.352
0.469
0.363 0.363 0.459 0.384 0.011 0.011
0.011
0.000
0.000
0.000
6/22/2011 19:00
1.016
5.271
5.826
5.922
4.983
4.972
5.367 5.260 3.969 5.196 7.682 7.277
7.821
6.925
0.000
7.736
6/22/2011 20:00
0.508
2.454
2.358
2.390
2.358
2.571
2.305 2.390 4.183 2.273 0.928 0.896
0.960
0.736
0.000
0.939
6/22/2011 21:00
0.254
1.280
1.248
1.216
1.184
1.387
1.184 1.195 1.558 1.131 0.587 0.544
0.608
0.427
0.000
0.555
94

Table 55 (cont’d)

6/22/2011 22:00
6/22/2011 23:00
6/23/2011 0:00
6/23/2011 1:00
6/23/2011 2:00
6/23/2011 3:00
6/23/2011 4:00
6/23/2011 5:00
6/23/2011 6:00
6/23/2011 7:00
6/23/2011 8:00
6/23/2011 9:00
6/23/2011 10:00
6/23/2011 11:00
6/23/2011 12:00
6/23/2011 13:00
6/23/2011 14:00
6/23/2011 15:00
6/23/2011 16:00
6/23/2011 17:00
6/23/2011 18:00
6/23/2011 19:00
6/23/2011 20:00
6/23/2011 21:00
6/23/2011 22:00
6/23/2011 23:00
6/24/2011 0:00
Totals (mm)

0
0.254
2.032
0
2.54
2.286
2.286
4.318
0.508
0.254
0.762
1.27
0
0
0
0
0
0.254
0
0
0
0
0
0
0
0
0
55.880

0.822
0.491
0.352
1.088
0.672
1.056
2.689
1.665
3.927
2.646
1.056
0.790
1.174
0.662
0.427
0.288
0.171
0.107
0.085
0.032
0.011
0.011
0.000
0.000
0.000
0.000
0.000
53.905

0.811
0.480
0.320
1.056
0.736
1.035
3.105
1.579
4.289
2.529
0.939
0.726
1.163
0.747
0.427
0.267
0.203
0.107
0.096
0.043
0.021
0.000
0.000
0.000
0.000
0.000
0.000
55.719

0.811
0.448
0.320
1.046
0.747
1.014
3.180
1.601
4.257
2.678
0.896
0.694
1.152
0.715
0.405
0.277
0.181
0.096
0.085
0.021
0.000
0.000
0.000
0.000
0.000
0.000
0.000
55.228

0.790
0.491
0.341
0.683
0.736
0.736
2.870
1.483
3.638
2.924
0.971
0.630
0.896
0.790
0.480
0.320
0.213
0.117
0.107
0.032
0.032
0.000
0.000
0.011
0.000
0.000
0.000
47.695

0.950
0.619
0.416
0.758
0.822
0.822
2.913
1.686
3.670
3.169
1.216
0.790
1.035
0.960
0.566
0.427
0.277
0.192
0.139
0.107
0.075
0.053
0.032
0.032
0.021
0.011
0.021
52.763

0.790 0.779 0.950 0.768 0.277 0.245
0.501 0.501 0.598 0.512 0.021 0.021
0.341 0.341 0.405 0.341 0.075 0.085
0.768 0.736 0.800 0.736 2.113 2.059
0.704 0.694 0.800 0.662 0.192 0.181
0.800 0.758 0.800 0.758 2.187 2.187
2.977 2.849 2.187 2.785 2.465 2.369
1.526 1.515 2.294 1.451 2.081 2.006
3.831 3.670 2.187 3.564 4.439 4.247
2.838 2.913 2.593 2.806 0.480 0.448
0.960 0.971 2.166 0.960 0.309 0.288
0.672 0.640 1.547 0.662 0.480 0.469
0.971 0.918 1.078 0.907 1.504 1.430
0.800 0.747 0.982 0.768 0.032 0.032
0.501 0.480 0.576 0.523 0.011 0.000
0.341 0.341 0.395 0.352 0.000 0.000
0.224 0.224 0.277 0.245 0.000 0.011
0.139 0.149 0.192 0.181 0.000 0.000
0.096 0.107 0.149 0.128 0.149 0.149
0.075 0.085 0.107 0.107 0.011 0.011
0.053 0.043 0.075 0.064 0.000 0.000
0.032 0.021 0.043 0.043 0.000 0.000
0.021 0.021 0.032 0.032 0.000 0.000
0.021 0.011 0.032 0.032 0.000 0.000
0.011 0.011 0.021 0.021 0.000 0.000
0.011 0.011 0.011 0.011 0.000 0.000
0.000 0.000 0.011 0.011 0.000 0.000
50.096 48.826 52.358 48.388 49.690 47.652

Data from rain event on 6/22/2011.

95

0.235
0.021
0.107
2.123
0.192
2.283
2.486
2.113
4.449
0.480
0.341
0.491
1.494
0.011
0.000
0.000
0.011
0.000
0.160
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
49.477

0.203
0.000
0.043
1.857
0.149
1.910
2.123
1.771
3.767
0.341
0.235
0.363
1.216
0.011
0.000
0.000
0.000
0.000
0.021
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
43.363

0.011
0.000
0.011
0.064
0.032
0.053
0.171
0.064
0.309
0.192
0.021
0.032
0.085
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
1.216

0.256
0.021
0.064
2.113
0.203
2.283
2.614
2.177
4.620
0.501
0.309
0.491
1.568
0.021
0.000
0.011
0.000
0.000
0.021
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
47.012

Table 56.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
7/18/2011 0:00
3.556
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/18/2011 1:00
9.91
0.256
0.245
0.320
0.160
0.309
0.117 0.096 0.064 0.203 2.892 3.052
2.828
2.582
0.000
2.603
7/18/2011 2:00
0.254
8.387
9.635
9.795
7.394
8.291
8.088 6.135 0.928 7.117 9.411 9.848
8.931
9.208
0.000
9.336
7/18/2011 3:00
0
1.408
1.206
1.398
1.003
1.163
1.142 1.014 0.331 0.896 0.320 0.235
0.267
0.267
0.000
0.309
7/18/2011 4:00
0
0.534
0.469
0.534
0.331
0.427
0.405 0.331 0.181 0.320 0.011 0.011
0.011
0.011
0.000
0.021
7/18/2011 5:00
0
0.299
0.224
0.277
0.139
0.149
0.181 0.149 0.117 0.117 0.021 0.011
0.011
0.000
0.000
0.011
7/18/2011 6:00
0
0.181
0.139
0.192
0.064
0.075
0.096 0.075 0.064 0.053 0.011 0.011
0.021
0.000
0.000
0.011
7/18/2011 7:00
0
0.117
0.096
0.117
0.021
0.053
0.053 0.032 0.032 0.011 0.011 0.021
0.011
0.011
0.000
0.011
7/18/2011 8:00
0
0.085
0.075
0.085
0.021
0.011
0.032 0.021 0.021 0.011 0.011 0.000
0.000
0.000
0.000
0.011
7/18/2011 9:00
0
0.053
0.053
0.064
0.000
0.011
0.011 0.000 0.011 0.011 0.000 0.011
0.000
0.000
0.000
0.000
7/18/2011 10:00
0
0.053
0.043
0.032
0.000
0.021
0.011 0.000 0.011 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/18/2011 11:00
0
0.011
0.032
0.011
0.000
0.011
0.000 0.000 0.011 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/18/2011 12:00
0.508
0.011
0.021
0.000
0.000
0.000
0.000 0.000 0.011 0.000 0.000 0.000
0.000
0.000
0.000
0.000
7/18/2011 13:00
0
0.032
0.043
0.043
0.011
0.011
0.011 0.000 0.011 0.000 0.469 0.427
0.512
0.384
0.000
0.341
7/18/2011 14:00
0
0.032
0.011
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.000
7/18/2011 15:00
0
0.000
0.011
0.011
0.000
0.000
0.000 0.000 0.011 0.000 0.000 0.000
0.000
0.000
0.000
0.000
12.879
9.144
10.531
10.147 7.853 1.803 8.739 13.156 13.636
12.591
12.463
0.000
12.655
Totals (mm) 14.228 11.460 12.303

Data from rain event on 7/18/2011.

96

Table 57.

media
media
media
sedum
sedum
sedum
grass
grass
grass
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
8/2/2011 11:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/2/2011 12:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/2/2011 13:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/2/2011 14:00
16.51
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/2/2011 15:00
0
8.451
8.408
8.344
7.480
0.000
7.672 5.250 6.263 6.519
8/2/2011 16:00
0
2.209
1.665
2.209
1.515
0.000
1.803 2.145 2.006 1.729
8/2/2011 17:00
0
0.598
0.491
0.640
0.320
0.000
0.416 0.566 0.501 0.469
8/2/2011 18:00
0
0.277
0.213
0.331
0.128
0.000
0.181 0.309 0.256 0.235
8/2/2011 19:00
0
0.160
0.128
0.192
0.043
0.000
0.064 0.171 0.149 0.117
8/2/2011 20:00
0
0.096
0.064
0.128
0.011
0.011
0.043 0.117 0.096 0.075
8/2/2011 21:00
0.508
0.053
0.032
0.085
0.000
0.171
0.011 0.075 0.053 0.043
8/2/2011 22:00
0.254
0.203
0.203
0.192
0.021
0.139
0.011 0.096 0.053 0.064
8/2/2011 23:00
0
0.128
0.107
0.139
0.000
0.043
0.021 0.085 0.053 0.053
8/3/2011 0:00
0
0.096
0.064
0.107
0.000
0.011
0.011 0.064 0.043 0.032
8/3/2011 1:00
0
0.053
0.053
0.064
0.000
0.011
0.011 0.043 0.021 0.021
8/3/2011 2:00
0.508
0.043
0.032
0.053
0.000
0.000
0.011 0.032 0.011 0.021
8/3/2011 3:00
0
0.192
0.171
0.171
0.011
0.011
0.021 0.096 0.043 0.043
8/3/2011 4:00
0
0.096
0.096
0.117
0.000
0.000
0.043 0.075 0.053 0.053
8/3/2011 5:00
0
0.075
0.043
0.075
0.011
0.000
0.021 0.043 0.032 0.021
8/3/2011 6:00
0
0.043
0.043
0.053
0.000
0.000
0.021 0.021 0.011 0.021
8/3/2011 7:00
0
0.032
0.021
0.032
0.000
0.000
0.011 0.021 0.011 0.011
8/3/2011 8:00
0
0.032
0.021
0.032
0.000
0.000
0.011 0.021 0.011 0.011
8/3/2011 9:00
0
0.011
0.011
0.021
0.000
0.000
0.000 0.000 0.000 0.000
8/3/2011 10:00
0
0.011
0.000
0.021
0.000
0.000
0.011 0.011 0.000 0.000
9.539
0.395
10.393 9.240 9.667 9.539
Totals (mm) 18.034 12.857 11.865 13.007

Data from rain event on 8/2/2011.

97

steel
(1)
0.011
0.224
0.075
0.000
12.793
0.032
0.011
0.000
0.000
0.011
0.000
0.758
0.096
0.021
0.011
0.011
0.587
0.021
0.011
0.000
0.011
0.000
0.000
0.000
14.682

steel
(2)
0.000
0.267
0.043
0.011
13.359
0.021
0.011
0.000
0.000
0.011
0.000
0.726
0.107
0.000
0.011
0.011
0.576
0.000
0.011
0.000
0.000
0.000
0.000
0.011
15.173

steel
shingle
shingle
shingle
(3)
(1)
(2)
(3)
0.000
0.000
0.000
0.000
0.277
0.096
0.000
0.085
0.053
0.043
0.000
0.053
0.011
0.000
0.000
0.000
13.113
12.804
0.000
13.135
0.011
0.011
0.000
0.032
0.011
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.736
0.587
0.000
0.566
0.107
0.075
0.000
0.096
0.011
0.011
0.000
0.021
0.011
0.011
0.000
0.011
0.000
0.000
0.000
0.011
0.587
0.544
0.000
0.523
0.011
0.011
0.000
0.011
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
14.970
14.202
0.000
14.554

Table 58.

media
media
media
sedum
sedum
sedum
grass
grass
grass
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
Date/Time rainfall (1)
8/12/2011 13:00
13.46
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000
8/12/2011 14:00
0
3.116
3.468
3.340
2.102
0.000
1.846 1.408 1.035 1.430
8/12/2011 15:00
0
3.873
3.340
4.215
3.126
0.000
3.009 4.898 4.588 4.055
8/12/2011 16:00
0
1.035
0.736
0.928
0.694
0.000
0.694 1.035 0.950 0.843
8/12/2011 17:00
0
0.491
0.299
0.437
0.299
0.000
0.299 0.534 0.480 0.416
8/12/2011 18:00
0
0.245
0.139
0.235
0.149
0.000
0.149 0.341 0.267 0.245
8/12/2011 19:00
0
0.128
0.064
0.128
0.064
0.000
0.075 0.213 0.181 0.149
8/12/2011 20:00
0
0.096
0.032
0.075
0.043
0.000
0.053 0.160 0.107 0.107
8/12/2011 21:00
0
0.064
0.032
0.053
0.021
0.000
0.032 0.107 0.085 0.075
8/12/2011 22:00
0
0.043
0.011
0.032
0.011
0.000
0.032 0.085 0.064 0.053
8/12/2011 23:00
0
0.032
0.021
0.032
0.000
0.000
0.021 0.064 0.043 0.043
8/13/2011 0:00
0
0.032
0.011
0.011
0.000
0.011
0.021 0.064 0.043 0.032
9.155
8.152
9.486
6.509
0.011
6.231 8.909 7.842 7.448
Totals (mm) 13.460

Data from rain event on 8/12/2011.

98

steel
(1)
0.000
11.268
0.064
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
11.342

steel
shingle
shingle
shingle
(2)
steel (3) (1)
(2)
(3)
0.000
0.000
0.000
0.000
0.000
11.204
11.332
10.745
0.000
11.107
0.043
0.053
0.043
0.000
0.064
0.000
0.000
0.011
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.011
11.246
11.385
10.798
0.000
11.182

Table 59.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
8/23/2011 17:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8/23/2011 18:00
1.016
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.320 0.309
0.331
0.181
0.000
0.171
8/23/2011 19:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.800 0.768
0.832
0.747
0.000
0.779
8/23/2011 20:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.309 0.299
0.320
0.267
0.000
0.277
8/23/2011 21:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.011
0.011
0.000
0.021
8/23/2011 22:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.011
8/23/2011 23:00
1.27
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.000
0.000
0.000
0.000
8/24/2011 0:00
7.62
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.864 0.864
0.960
0.758
0.000
0.854
8/24/2011 1:00
3.048
1.067
1.323
0.790
0.032
0.000
0.043 0.000 0.000 0.064 6.455 6.274
6.711
6.338
0.000
7.096
8/24/2011 2:00
0.254
1.878
1.761
1.921
0.160
0.000
0.256 0.000 0.000 0.107 3.009 2.924
3.030
2.689
0.000
3.041
8/24/2011 3:00
0
1.867
1.558
2.155
1.462
0.000
1.408 0.640 0.128 0.160 0.117 0.075
0.085
0.053
0.000
0.107
8/24/2011 4:00
0
0.715
0.437
0.864
0.566
0.000
0.587 0.768 0.566 0.395 0.011 0.011
0.011
0.000
0.000
0.011
8/24/2011 5:00
0
0.395
0.213
0.491
0.288
0.000
0.341 0.501 0.427 0.352 0.000 0.000
0.000
0.000
0.000
0.011
8/24/2011 6:00
0
0.245
0.117
0.309
0.181
0.000
0.203 0.363 0.299 0.256 0.011 0.011
0.000
0.000
0.000
0.011
8/24/2011 7:00
0
0.181
0.096
0.213
0.117
0.000
0.139 0.267 0.235 0.192 0.000 0.000
0.011
0.011
0.000
0.000
8/24/2011 8:00
0
0.139
0.064
0.171
0.075
0.000
0.107 0.224 0.160 0.149 0.000 0.000
0.000
0.000
0.000
0.000
8/24/2011 9:00
0
0.107
0.053
0.117
0.064
0.000
0.075 0.181 0.139 0.128 0.000 0.000
0.000
0.000
0.000
0.011
8/24/2011 10:00
0
0.096
0.032
0.107
0.043
0.000
0.064 0.149 0.117 0.096 0.000 0.000
0.000
0.000
0.000
0.011
8/24/2011 11:00
0
0.075
0.032
0.096
0.043
0.000
0.043 0.139 0.107 0.085 0.011 0.000
0.000
0.000
0.000
0.000
8/24/2011 12:00
0
0.053
0.011
0.075
0.011
0.000
0.032 0.107 0.064 0.064 0.000 0.000
0.000
0.000
0.000
0.000
8/24/2011 13:00
0
0.043
0.011
0.043
0.011
0.000
0.032 0.107 0.064 0.053 0.000 0.000
0.000
0.000
0.000
0.000
8/24/2011 14:00
0
0.021
0.000
0.043
0.011
0.000
0.011 0.075 0.053 0.053 0.000 0.000
0.000
0.000
0.000
0.000
6.882
5.708
7.394
3.062
0.000
3.340 3.521 2.358 2.155 11.940 11.556
12.303
11.054
0.000
12.409
Totals (mm) 13.716

Data from rain event on 8/23/2011.

99

Table 60.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
9/2/2011 23:00
3.556
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/3/2011 0:00
0.254
0.000
0.000
0.000
0.117
0.043
0.075 0.000 0.000 0.000 3.116 3.116
3.158
3.020
0.000
3.116
9/3/2011 1:00
0
0.000
0.000
0.000
0.011
0.000
0.000 0.000 0.000 0.011 0.075 0.053
0.064
0.053
0.000
0.085
9/3/2011 2:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.011
0.011
0.000
0.021
9/3/2011 3:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.011
9/3/2011 4:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.011
0.000
0.000
0.000
9/3/2011 5:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.000
9/3/2011 6:00
0.508
0.000
0.000
0.000
0.000
0.053
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/3/2011 7:00
0.762
0.011
0.011
0.000
0.011
0.000
0.011 0.000 0.000 0.000 0.608 0.630
0.640
0.512
0.000
0.480
9/3/2011 8:00
0
0.021
0.011
0.075
0.011
0.021
0.000 0.000 0.000 0.011 0.758 0.694
0.790
0.704
0.000
0.779
9/3/2011 9:00
3.048
0.085
0.000
0.160
0.000
0.021
0.000 0.000 0.000 0.000 0.032 0.021
0.021
0.011
0.000
0.032
9/3/2011 10:00
0.254
1.259
0.875
1.014
0.053
0.128
0.139 0.032 0.000 0.160 3.340 3.340
3.308
3.030
0.000
3.340
9/3/2011 11:00
0
0.971
0.779
0.864
0.000
0.000
0.021 0.011 0.000 0.032 0.235 0.213
0.256
0.203
0.000
0.277
9/3/2011 12:00
0
0.373
0.245
0.427
0.000
0.000
0.000 0.011 0.000 0.000 0.021 0.011
0.021
0.011
0.000
0.021
9/3/2011 13:00
0
0.213
0.096
0.256
0.000
0.032
0.000 0.011 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.011
9/3/2011 14:00
0
0.128
0.043
0.181
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.000
9/3/2011 15:00
0
0.096
0.021
0.139
0.000
0.032
0.000 0.011 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/3/2011 16:00
0
0.064
0.011
0.085
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/3/2011 17:00
0
0.032
0.000
0.043
0.000
0.075
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/3/2011 18:00
0
0.021
0.000
0.032
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/3/2011 19:00
0
0.011
0.000
0.032
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/3/2011 20:00
0
0.011
0.000
0.011
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
8.382
3.297
2.091
3.318
0.203
0.405
0.245 0.075 0.000 0.213 8.227 8.099
8.280
7.554
0.000
8.173
Totals (mm)

Data from rain event on 9/2/2011.

100

Table 61.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
9/3/2011 22:00
14.22
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/3/2011 23:00
0
7.714
8.536
8.195
7.149
7.821
7.618 5.965 6.573 6.167 8.824 8.803
8.888
8.131
0.000
9.048
9/4/2011 0:00
0.254
2.241
1.867
2.305
2.091
2.486
2.145 2.678 2.198 2.113 0.235 0.203
0.235
0.181
0.000
0.235
9/4/2011 1:00
0
0.896
0.704
0.907
0.790
0.939
0.822 1.046 0.811 0.800 0.085 0.064
0.075
0.064
0.000
0.085
9/4/2011 2:00
0
0.512
0.373
0.523
0.448
0.534
0.459 0.598 0.480 0.480 0.021 0.011
0.000
0.011
0.000
0.021
9/4/2011 3:00
0
0.341
0.235
0.341
0.277
0.331
0.288 0.427 0.309 0.331 0.000 0.011
0.011
0.000
0.000
0.011
9/4/2011 4:00
0
0.235
0.160
0.256
0.181
0.235
0.203 0.299 0.213 0.224 0.000 0.000
0.011
0.000
0.000
0.000
9/4/2011 5:00
0
0.171
0.128
0.192
0.139
0.171
0.149 0.245 0.171 0.171 0.011 0.000
0.000
0.000
0.000
0.011
9/4/2011 6:00
0
0.107
0.096
0.128
0.096
0.117
0.107 0.181 0.117 0.128 0.000 0.000
0.000
0.011
0.000
0.000
9/4/2011 7:00
0
0.075
0.053
0.107
0.075
0.096
0.075 0.149 0.096 0.096 0.000 0.011
0.000
0.000
0.000
0.000
9/4/2011 8:00
0
0.064
0.053
0.085
0.043
0.075
0.053 0.117 0.075 0.075 0.000 0.000
0.000
0.000
0.000
0.000
9/4/2011 9:00
0
0.053
0.043
0.064
0.043
0.053
0.053 0.096 0.053 0.064 0.000 0.000
0.000
0.000
0.000
0.000
9/4/2011 10:00
0
0.043
0.032
0.053
0.043
0.043
0.032 0.075 0.043 0.043 0.000 0.000
0.000
0.000
0.000
0.000
9/4/2011 11:00
0
0.021
0.011
0.053
0.011
0.032
0.032 0.064 0.021 0.032 0.000 0.000
0.000
0.000
0.000
0.000
9/4/2011 12:00
0
0.021
0.011
0.021
0.011
0.021
0.011 0.053 0.021 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9/4/2011 13:00
0
0.000
0.000
0.011
0.000
0.011
0.011 0.032 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9/4/2011 14:00
0
0.011
0.000
0.011
0.011
0.000
0.000 0.032 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
13.252
11.406
12.964
12.057 12.057 11.193 10.745 9.176 9.102
9.219
8.397
0.000
9.411
Totals (mm) 14.474 12.505 12.303

Data from rain event on 9/3/2011.

101

Table 62.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
9/15/2011 0:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/15/2011 1:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.341 0.331
0.352
0.224
0.000
0.203
9/15/2011 2:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.043 0.032
0.043
0.032
0.000
0.043
9/15/2011 3:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.011
0.000
0.000
0.000
0.011
9/15/2011 4:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.000
9/15/2011 5:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/15/2011 6:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/15/2011 7:00
0.762
0.000
0.000
0.000
0.000
0.011
0.000 0.000 0.000 0.000 0.213 0.213
0.213
0.117
0.000
0.096
9/15/2011 8:00
0
0.011
0.000
0.011
0.011
0.032
0.000 0.000 0.000 0.000 0.768 0.768
0.758
0.694
0.000
0.726
9/15/2011 9:00
0
0.011
0.000
0.000
0.011
0.000
0.011 0.000 0.000 0.011 0.032 0.021
0.021
0.021
0.000
0.032
9/15/2011 10:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.107 0.117
0.107
0.053
0.000
0.064
9/15/2011 11:00
0
0.021
0.021
0.064
0.021
0.064
0.021 0.011 0.000 0.043 1.046 0.982
1.003
1.046
0.000
1.003
9/15/2011 12:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.011
0.011
0.000
0.000
0.011
9/15/2011 13:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.011 0.032
0.011
0.000
0.000
0.000
1.778
0.043
0.021
0.075
0.043
0.107
0.032 0.011 0.000 0.053 2.582 2.518
2.518
2.187
0.000
2.187
Totals (mm)

Data from rain event on 9/15/2011.

102

Table 63.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
9/19/2011 0:00
0.762
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.021
0.000
0.000
0.000
9/19/2011 1:00
1.016
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.694 0.704
0.779
0.587
0.000
0.566
9/19/2011 2:00
1.27
0.011
0.000
0.000
0.000
0.021
0.000 0.000 0.000 0.000 1.195 1.152
1.280
1.120
0.000
1.099
9/19/2011 3:00
0.762
0.021
0.021
0.011
0.011
0.043
0.011 0.000 0.000 0.000 1.462 1.398
1.536
1.440
0.000
1.440
9/19/2011 4:00
3.302
0.011
0.000
0.000
0.011
0.021
0.000 0.000 0.000 0.000 0.608 0.598
0.651
0.555
0.000
0.576
9/19/2011 5:00
0.508
0.096
0.566
0.053
0.032
0.064
0.075 0.021 0.000 0.096 3.532 3.382
3.606
3.233
0.000
3.660
9/19/2011 6:00
0.508
0.886
0.907
1.067
0.011
0.032
0.011 0.011 0.000 0.021 0.779 0.790
0.832
0.683
0.000
0.811
9/19/2011 7:00
0.762
0.662
0.416
0.768
0.000
0.000
0.011 0.011 0.000 0.011 0.448 0.459
0.480
0.395
0.000
0.459
9/19/2011 8:00
0.254
0.715
0.640
0.811
0.085
0.544
0.320 0.011 0.000 0.043 0.715 0.694
0.779
0.651
0.000
0.779
9/19/2011 9:00
0.508
0.512
0.373
0.608
0.384
0.555
0.405 0.000 0.000 0.000 0.160 0.160
0.171
0.139
0.000
0.160
9/19/2011 10:00
5.588
0.448
0.341
0.491
0.341
0.448
0.352 0.000 0.000 0.011 0.608 0.608
0.672
0.576
0.000
0.619
9/19/2011 11:00
1.27
3.372
4.215
3.478
3.084
2.273
3.372 0.918 1.259 1.601 5.975 5.975
5.943
5.655
0.000
6.327
9/19/2011 12:00
1.27
2.870
2.315
3.062
2.774
3.820
2.732 2.721 2.988 2.913 1.387 1.398
1.408
1.238
0.000
1.419
9/19/2011 13:00
0
2.251
2.209
2.369
2.177
2.668
2.273 2.241 2.134 2.219 1.568 1.515
1.547
1.430
0.000
1.633
9/19/2011 14:00
0
1.184
0.907
1.238
1.099
1.761
1.142 1.579 1.344 1.312 0.149 0.160
0.181
0.107
0.000
0.128
9/19/2011 15:00
0
0.683
0.448
0.683
0.598
0.715
0.598 0.971 0.768 0.790 0.064 0.032
0.043
0.032
0.000
0.053
9/19/2011 16:00
0
0.416
0.277
0.437
0.363
0.459
0.384 0.651 0.501 0.523 0.000 0.000
0.011
0.000
0.000
0.000
9/19/2011 17:00
0
0.277
0.181
0.309
0.245
0.309
0.267 0.469 0.341 0.352 0.000 0.011
0.000
0.011
0.000
0.000
9/19/2011 18:00
0
0.181
0.096
0.203
0.171
0.224
0.181 0.341 0.235 0.256 0.021 0.000
0.000
0.000
0.000
0.000
9/19/2011 19:00
0
0.139
0.064
0.149
0.117
0.160
0.139 0.267 0.181 0.203 0.000 0.000
0.000
0.000
0.000
0.000
9/19/2011 20:00
0.254
0.096
0.043
0.117
0.085
0.117
0.096 0.203 0.139 0.139 0.000 0.000
0.000
0.000
0.000
0.011
9/19/2011 21:00
0
0.064
0.043
0.085
0.064
0.085
0.064 0.171 0.117 0.128 0.000 0.000
0.000
0.000
0.000
0.000
9/19/2011 22:00
0
0.053
0.011
0.064
0.053
0.075
0.053 0.139 0.096 0.096 0.000 0.000
0.000
0.000
0.000
0.000
9/19/2011 23:00
0
0.032
0.021
0.053
0.032
0.053
0.053 0.117 0.075 0.075 0.000 0.000
0.011
0.000
0.000
0.000
9/20/2011 0:00
0
0.032
0.021
0.053
0.032
0.043
0.032 0.096 0.064 0.075 0.000 0.000
0.000
0.000
0.000
0.000
9/20/2011 1:00
0
0.032
0.021
0.043
0.032
0.043
0.032 0.085 0.053 0.064 0.000 0.011
0.021
0.000
0.000
0.000
9/20/2011 2:00
0
0.021
0.011
0.032
0.011
0.032
0.032 0.085 0.053 0.053 0.000 0.032
0.032
0.000
0.000
0.000
9/20/2011 3:00
0
0.032
0.021
0.032
0.011
0.021
0.021 0.064 0.043 0.053 0.021 0.032
0.032
0.000
0.000
0.000
9/20/2011 4:00
0
0.021
0.011
0.032
0.021
0.021
0.032 0.064 0.032 0.043 0.032 0.032
0.032
0.011
0.000
0.011
9/20/2011 5:00
0
0.021
0.011
0.032
0.011
0.021
0.000 0.053 0.043 0.043 0.021 0.032
0.032
0.021
0.000
0.021
9/20/2011 6:00
0
0.021
0.011
0.032
0.011
0.021
0.021 0.043 0.021 0.032 0.043 0.032
0.032
0.021
0.000
0.021
16.314
11.865
14.650
12.708 11.332 10.489 11.150 19.483 19.206
20.134
17.904
0.000
19.793
Totals (mm) 18.034 15.162 14.202

Data from rain event on 9/19/2011.

103

Table 64.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
9/21/2011 8:00
1.27
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
9/21/2011 9:00
0.762
0.011
0.000
0.053
0.000
0.011
0.000 0.011 0.000 0.000 0.960 0.918
1.003
0.843
0.000
0.875
9/21/2011 10:00
0.254
0.277
0.267
0.288
0.043
0.021
0.032 0.128 0.053 0.117 0.832 0.800
0.864
0.758
0.011
0.854
9/21/2011 11:00
0
0.245
0.224
0.245
0.139
0.235
0.128 0.160 0.139 0.139 0.128 0.117
0.149
0.107
0.000
0.128
9/21/2011 12:00
0
0.160
0.149
0.160
0.085
0.139
0.096 0.107 0.107 0.107 0.011 0.011
0.011
0.011
0.000
0.011
9/21/2011 13:00
0
0.107
0.096
0.128
0.085
0.085
0.075 0.085 0.064 0.075 0.011 0.000
0.000
0.000
0.000
0.011
9/21/2011 14:00
0
0.053
0.053
0.064
0.043
0.064
0.064 0.053 0.043 0.043 0.000 0.000
0.000
0.000
0.000
0.000
9/21/2011 15:00
0
0.021
0.021
0.043
0.021
0.032
0.032 0.043 0.032 0.021 0.000 0.000
0.000
0.000
0.000
0.000
9/21/2011 16:00
0
0.000
0.011
0.011
0.011
0.011
0.021 0.021 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9/21/2011 17:00
0
0.000
0.000
0.011
0.000
0.011
0.011 0.011 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
9/21/2011 18:00
0
0.000
0.000
0.000
0.000
0.000
0.000 0.021 0.000 0.000 0.011 0.000
0.000
0.000
0.000
0.000
2.286
0.875
0.822
1.003
0.427
0.608
0.459 0.640 0.459 0.523 1.953 1.846
2.027
1.718
0.011
1.878
Totals (mm)

Data from rain event on 9/21/2011.

104

Table 65.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
10/18/2011 19:00
0.254
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/18/2011 20:00
1.524
0.021
0.000
0.011
0.000
0.021
0.000 0.011 0.000 0.000 0.768 0.758
0.768
0.598
0.000
0.576
10/18/2011 21:00
0.762
0.096
0.032
0.149
0.043
0.107
0.053 0.053 0.000 0.075 1.814 1.729
1.793
1.718
0.000
1.739
10/18/2011 22:00
0
0.213
0.213
0.309
0.032
0.064
0.043 0.053 0.000 0.053 1.088 1.024
1.046
0.982
0.000
1.078
10/18/2011 23:00
0
0.277
0.256
0.288
0.053
0.000
0.107 0.096 0.064 0.043 0.043 0.021
0.032
0.011
0.000
0.021
10/19/2011 0:00
0.762
0.203
0.192
0.192
0.085
0.117
0.117 0.085 0.096 0.075 0.011 0.011
0.000
0.011
0.000
0.011
10/19/2011 1:00
0
0.288
0.267
0.309
0.117
0.128
0.171 0.117 0.075 0.117 0.982 1.003
0.992
0.896
0.000
0.960
10/19/2011 2:00
0
0.320
0.341
0.331
0.171
0.149
0.192 0.128 0.107 0.128 0.085 0.064
0.085
0.053
0.000
0.085
10/19/2011 3:00
0
0.235
0.235
0.213
0.139
0.128
0.160 0.107 0.107 0.107 0.021 0.011
0.000
0.011
0.000
0.011
10/19/2011 4:00
0
0.171
0.171
0.171
0.117
0.107
0.128 0.096 0.085 0.085 0.011 0.000
0.000
0.000
0.000
0.000
10/19/2011 5:00
0
0.139
0.128
0.139
0.107
0.085
0.117 0.085 0.075 0.085 0.000 0.000
0.011
0.000
0.000
0.000
10/19/2011 6:00
0
0.117
0.096
0.107
0.096
0.085
0.107 0.064 0.053 0.064 0.000 0.011
0.000
0.000
0.000
0.011
10/19/2011 7:00
0
0.096
0.085
0.107
0.085
0.064
0.096 0.053 0.064 0.053 0.000 0.000
0.000
0.000
0.000
0.000
10/19/2011 8:00
0
0.096
0.085
0.096
0.085
0.075
0.085 0.064 0.053 0.053 0.011 0.000
0.000
0.000
0.000
0.000
10/19/2011 9:00
0
0.075
0.075
0.075
0.064
0.075
0.107 0.053 0.053 0.053 0.000 0.000
0.000
0.000
0.000
0.000
10/19/2011 10:00
0
0.064
0.064
0.075
0.075
0.064
0.075 0.043 0.053 0.043 0.000 0.000
0.000
0.000
0.000
0.000
10/19/2011 11:00
0
0.064
0.053
0.064
0.064
0.064
0.075 0.043 0.053 0.043 0.000 0.000
0.000
0.000
0.000
0.000
10/19/2011 12:00
0
0.053
0.043
0.053
0.053
0.053
0.064 0.043 0.043 0.032 0.000 0.000
0.000
0.000
0.000
0.000
3.302
2.529
2.337
2.689
1.387
1.387
1.697 1.195 0.982 1.110 4.834 4.631
4.727
4.279
0.000
4.492
Totals (mm)

Data from rain event on 10/18/2011.

105

Table 66.

media
media
media
sedum
sedum
sedum
grass
grass
grass
steel
steel
shingle
shingle
shingle
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
steel (3) (1)
(2)
(3)
Date/Time rainfall (1)
10/23/2011 22:00
0.508
0.000
0.000
0.000
0.000
0.000
0.000 0.000 0.000 0.000 0.000 0.000
0.000
0.000
0.000
0.000
10/23/2011 23:00
0.254
0.000
0.000
0.032
0.000
0.000
0.011 0.000 0.000 0.000 0.619 0.640
0.694
0.469
0.000
0.501
10/24/2011 0:00
0
0.096
0.107
0.117
0.064
0.021
0.021 0.021 0.021 0.000 0.235 0.235
0.267
0.213
0.000
0.245
10/24/2011 1:00
0.508
0.053
0.075
0.075
0.053
0.053
0.043 0.032 0.021 0.021 0.021 0.011
0.021
0.000
0.000
0.021
10/24/2011 2:00
0
0.053
0.064
0.064
0.032
0.043
0.043 0.032 0.032 0.021 0.331 0.341
0.373
0.309
0.000
0.341
10/24/2011 3:00
0
0.107
0.107
0.117
0.075
0.075
0.075 0.053 0.053 0.053 0.096 0.075
0.107
0.085
0.000
0.107
10/24/2011 4:00
0
0.064
0.085
0.085
0.064
0.064
0.064 0.053 0.043 0.043 0.021 0.011
0.011
0.000
0.000
0.011
10/24/2011 5:00
0
0.043
0.043
0.053
0.032
0.043
0.043 0.032 0.032 0.032 0.000 0.000
0.000
0.000
0.000
0.000
10/24/2011 6:00
0
0.032
0.043
0.043
0.032
0.032
0.032 0.032 0.032 0.021 0.011 0.000
0.011
0.000
0.000
0.000
10/24/2011 7:00
0
0.032
0.043
0.032
0.021
0.032
0.032 0.021 0.021 0.021 0.000 0.000
0.000
0.011
0.000
0.011
10/24/2011 8:00
0
0.021
0.021
0.021
0.021
0.021
0.032 0.021 0.021 0.021 0.000 0.000
0.000
0.000
0.000
0.000
10/24/2011 9:00
0
0.021
0.021
0.032
0.011
0.021
0.021 0.021 0.021 0.021 0.000 0.000
0.000
0.000
0.000
0.000
10/24/2011 10:00
0
0.021
0.032
0.021
0.011
0.011
0.021 0.021 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
10/24/2011 11:00
0
0.011
0.021
0.021
0.021
0.021
0.021 0.011 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
10/24/2011 12:00
0
0.011
0.011
0.011
0.011
0.011
0.011 0.011 0.011 0.011 0.000 0.000
0.000
0.000
0.000
0.000
1.270
0.566
0.672
0.726
0.448
0.448
0.469 0.363 0.331 0.288 1.334 1.312
1.483
1.088
0.000
1.238
Totals (mm)

Data from rain event on 10/23/2011.

106

Figure 1.

Graphic representation of land use change and its effects on stormwater runoff,
evapotranspiration and infiltration. Source: U.S. Environmental Protection Agency,
Washington, D.C. "Protecting Water Quality from Urban Runoff." Document No. EPA
841-F-03-003

107

Figure 2.

Graphic representation of the hydrologic cycle. Source:
http://www.buffer.forestry.iastate.edu/Photogallery/illustrations/illustrations-1.htm

108

Figure 3.

Example of early birch bark waterproof membrane technique. Scandinavian cabin, West
Norwegian Folk-Art Institute, Voss, Norway (Photo courtesy of Westphal 2008).

109

Figure 4.

Location map of study site on the Old Mission Peninsula, Michigan. (Aerial courtesy of
MI Geographic Data Library)

110

Figure 5.

Photo of .045mm EPDM rubber membrane used for waterproofing in study plots (Photo
courtesy of Cronk 2010).

111

Figure 6.

Green roof partitions draining to separate tipping bucket measuring devices (Photo
courtesy of Cronk 2010).

112

Figure 7.

Plant coverage in each green roof partition. Average plant cover for sedum and native
grass partitions was 90% and 95%, respectively. (Photo courtesy of Cronk 2010)

113

Figure 8.

Conventional roofing partitions draining into separate tipping bucket measuring devices
(Photo courtesy of Cronk 2010).

114

Figure 9.

Sedum
3

Media
3

Grass
3

Media
2

Grass
2

Sedum
2

Shingle
3

Steel
3

Shingle
3

Steel
2

Shingle
1

Grass Sedum Media
1
1
1

Steel
1

Diagram of treatments arranged in a completely stratified design with the conventional
roofing treatments occupying two platforms in an alternate pattern, and each of the three
green roof treatments found on three platforms in a rotated manner

115

Figure 10.

70

Precipitation (mm)

60
50
40
30
20
10
0
4/1/2010

7/1/2010

10/1/2010

1/1/2011
Date

4/1/2011

7/1/2011

10/1/2011

Daily precipitation (mm) during the experimental study (1 May 2010 to 31 October
2011). Data collected from a weather station located on the study site adjacent to the
research plots.

116

Figure 11.

9
8

Frequency

7
6
5
4
3
2
1
0-1
1-2
2-3
3-4
4-5
5-6
6-7
7-8
8-9
9-10
10-11
11-12
12-13
13-14
14-15
15-20
20-25
25-30
30-35
35-40
40-45
45-50
50-55
55-60
60-65
65-70

0

Rainfall (mm)

Frequency of rain events during the experimental study (1 May 2010 to 31 October
2011).

117

Figure 12.

40

Temperature (C)

30
20
10
maximum

0

minimum
-10
-20

Date

Daily maximum and minimum temperatures (C) during the experimental study (1 May
2010 to 31 October 2011). Data is from the Michigan Automated Weather Network’s
weather station located on the Old Mission Peninsula, MI.

118

Figure 13.
A.
2.50
Runoff (mm)

2.00
Media

1.50

Sedum
1.00

Grass

0.50

Steel
Shingle

0.00
1

2

3

4 5 6 7 8 9 10 11 12 13
Time After Initial Rainfall (h)

B.
6.00
Runoff (mm)

5.00
4.00

Media

3.00

Sedum

2.00

Grass
Steel

1.00

Shingle

0.00
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Time After Initial Rainfall (h)

119

Figure 13 (cont’d)

Runoff (mm)

C.
12.00
10.00
8.00
6.00
4.00
2.00
0.00

Media
Sedum
Grass
Steel
Shingle
1

2

3

4

5

6

7

8

9 10 11 12 13 14

Time After Initial Rainfall (h)

Runoff hydrographs of selected representative (A) light (3.56 mm), (B) medium (8.38
mm), and (C) heavy (20.83 mm) rain events. Lines represent runoff (mm) from mediaonly, sedum, grass, steel and shingle roof treatments. Values are averages of
measurements taken using three tipping bucket rain gauges. Note the different x and y
axis scales.

120

Figure 14.
A.
3.00
Runoff (mm)

2.50
2.00

Media

1.50

Sedum

1.00

Grass
Steel

0.50

Shingle

0.00
1

2

3

4

5

6

7

8

9

10 11 12 13

Time After Initial Rainfall (h)

Runoff (mm)

B.
8.00
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00

Media
Sedum
Grass
Steel
Shingle
1

2

3

4

5

6

7

8

9

10 11 12 13

Time After Initial Rainfall (h)

121

Figure 14 (cont’d)
C.
25.00
Media

Runoff (mm)

20.00

Sedum
15.00

Grass
Steel

10.00

Shingle

5.00
0.00
1

2

3

4 5 6 7 8 9 10 11 12 13 14
Time After Initial Rainfall (h)

Figure 14. Cumulative runoff hydrographs of selected representative (A) light (3.56
mm), (B) medium (8.38 mm), and (C) heavy (20.83 mm) rain events. Lines represent
runoff (mm) from media-only, sedum, grass, steel and shingle roof treatments. Values
are averages of measurements taken using three tipping bucket rain gauges. Note the
different x and y axis scales.

122

BIBLIOGRAPHY

123

Achuthan, K. 1974. “Man on the Hydrologic Cycle” Water Resources Bulletin 10(4):
756-758.
Baker, A.J.M., and R.R. Brooks. 1989. “Terrestrial higher plants which hyperaccumulate
metallic elements; a review of their distribution, ecology and phytochemistry.”
Biorecovery 1: 81-126.
Beach, D. 2002. Coastal Sprawl: The Effects of Urban Design on Aquatic Ecosystems in
the United States. Arlington, Virginia: Pew Oceans Commission.
Berndtsson, J. 2010. “Green roof performance towards management of runoff water
quantity and quality: A review.” Ecological Engineering 36: 351-360.
Black, Peter. 1996. Watershed hydrology. Chelsea, Michigan: Ann Arbor Press, Inc.
Brenneisen, S. 2006. Space for urban wildlife: Designing green roofs as habitats in
Switzerland. Urban Habitats, 4(1), 27-36.
Brenneisen, S. 2004. “Green roofs – how nature returns to the city.” Acta Hort
643: 289-293.
Carpenter, D., and P. Kaluvakolanu. 2010. “Effect of Roof Surface Type on Stormwater
Run-off from Full Scale Roofs in a Temperate Climate.” Journal of Irrigation and
Drainage Engineering.
Carter, T., and C.R. Jackson. 2007. “Vegetated roofs for stormwater management at
multiple spatial scales.” Landscape and Urban Planning 80: 84–94.
Carter, T.L., Rasmussen, T.C., 2006. Hydrologic behavior of vegetated roofs. J. Am.
Water Res. Assoc. 42 (5), 1261–1274.
Casey Trees Endowment. Trees Provide Us with a Variety of Benefits: Cleaner Water
and Less Polluted Runoff, http://www.caseytrees.org/resources/casefortrees.html
(accessed April 8, 2012).
Clar, M., B. Barfield, and T. O’Connor. 2004. Stormwater best management practices
design guide. Volume 2: Vegetative Biofiliters. Cincinatti, OH: National risk management
research laboratory. Office of research and development. USEPA.
Davie, T. 2002. Fundamentals of Hydrology. New York, New York: Routledge
DeNardo, J.C., Jarrett, A.R., Manbeck, H.B., Beattie, D.J., Berghage, R.D. 2005.
Stormwater mitigation and surface temperature reduction by green roofs. Trans. ASAE
48 (4), 1491–1496.
124

Dunnett, N., Nagase, A., Booth, R., and Grime, P. 2008. “Influence of vegetation
composition on runoff in two simulated green roof experiments.” Urban Ecosyst 11: 385398.
FLL (Forschungsgesellschaft Landschaftsentwicklung Landschaftsbau). 1995.
Guidelines for the Planning, Execution and Upkeep of Green-Roof Sites. Bonn, Germany
Foster, J. 2011. The Value of Green Infrastructure for Urban Climate Adaption.
Washington, DC: Center For Clean Air Policy.
Gedge, D. 2003. “From rubble to redstarts.” Paper presented at annual meeting for
Greening Rooftops for Sustainable Communities, Chicago, Illinois. May 2003.
Getter, K., D.B. Rowe, and J.A. Andresen. 2007. “Quantifying the effect of slope on
extensive green roof stormwater retention.” Ecological Engineering 31: 225-231.
Getter, K., and D.B. Rowe. 2006. “The role of extensive green roofs in sustainable
development.” HortScience 41: 1276-1285.
"Greenroofs.com: Industry Support." Greenroofs.com: The Resource Portal for Green
Roofs. Web. 04 Apr. 2012.
<http://www.greenroofs.com/Greenroofs101/industry_support.htm>.
Haemmerle, F. 2002. Der Markt für grüne Dächer wächst immer weiter.
Jahrbuch Dachbegrünung: 11–13.
Kloss, C., C. Calarusse. 2006. Rooftops to Rivers. Washington D.C.: Natural Resources
Defense Council
Kula, R. 2005. “Green roofs and the LEED green building rating system.” Paper
presented at annual meeting for Greening Rooftops for Sustainable Communities,
Washington, DC. 4-6 May 2005.
Liptan, T. 2003. Planning, zoning and financial incentives for ecoroofs in Portland,
Oregon. P. 113-120. In Proceedings of 1st North American Green Roof Conf.: Greening
Rooftops for Sustainable Communities, Chicago. 29-30 May 2003. Toronto, Ontario: The
Cardinal Group.
Millennium Ecosystem Assessment, 2005. Ecosystems and Human Well-being:
Synthesis. Washington, DC: Island Press.
Monterusso, M.A., D.B. Rowe, C.L. Rugh, and D.K. Russell. 2004. “Runoff water
quantity and quality from green roof systems.” Acta Hort 639: 369-376.

125

Nagase, A., and Dunnett, N. 2011. “Amount of water runoff from different vegetation
types on extensive green roofs: Effects of plant species, diversity and plant structure.”
Landscape Urban Plan doi: 10.1016/j.landurbanplan.2011.11.001
National Research Council. 2009. Urban stormwater management in the United States.
Washington D.C.: The National Academies Press.
Oberndorfer, E., Jeremy L., B. Bass, R. R.Coffman, H. Doshi, N. Dunnett, S. Gaffin, M.
Kohler, K. Liu, and B. Rowe. 2007. “Green roofs as urban ecosystems: ecolgical
structures, functions, and services.” Bioscience 57: 823-833.
Osmundson, T. 1999. Roof Gardens – History, Design and Construction. New York, NY:
W.W. Norton & Company, Inc.
Peck, S., C. Callaghan, M. Kuhn, and B. Bass. 1999. Greenbacks from
green roofs: Forging a new industry in Canada. Toronto, Ontario: Peck and Associates.
Rowe, D.B., M.A. Monterusso, and Clayton Rugh. 2006. “Assessment of heat expanded
slate and fertility requirements in green roof substrates.” HortTechnology 16: 471-477.
Rowe, D.B. 2010. “Green roofs as a means of pollution abatement.” Environmental
Pollution 159: 2100-2110.
Saxton, K.E. 1990. “Surface water of North America; Influence of land and vegetation on
streamflow.” In Surface Water Hydrology the Geology of North America, Wolman M.G.
[ed]. Boulder, Colorado: The Geological Society of America, Inc.
Schroll, E., J. Lambrinos, T. Righetti, and D. Sandrock. 2011. “The role of vegetation in
regulating stormwater runoff from green roofs in a winter rainfall climate.” Ecological
Engineering 37: 595-600.
Ulrich, R., and R. Simmons. 1986. “Recovery from stress during exposure to everyday
outdoor environments.” Paper presented at seventeenth annual conference of the
Environmental Design Research Association. Washington, D.C.: Environmental Design
Research Association.
United Nations. 2006. World urbanization prospects: The 2005 revision. New York, New
York: United Nations.
United States Environmental Protection Agency. 2003. Protecting water quality from
urban runoff. EPA 841-F-03-003. Washington, DC: United States Envionmental
Protection Agency.
United States Environmental Protection Agency. 2009. “What is a Wateshed?” (last
accessed 1 April 2010. <www.water.epa.gov/type/watersheds/whatis.cfm>.)
126

VanWoert, N., D.B. Rowe, J.A. Andresen, C.L. Rugh, R.T. Fernandez, and L.
Xiao. 2005. “Green roof stormwater retention: Effects of roof surface, slope, and
media depth.” Environmental Quality 34: 1036-1044.
Ward, A., and S. Trimble. 2004. Environmental Hydrology. Boca Raton, Florida: Lewis
Publishers.
Wong, N.H., Y. Chen, C. L. Ong, and A. Sia. 2003. “Investigation of thermal
benefits of rooftop garden in the tropical environment.” Building and Environment
38: 261-270.

127