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Green Roofs in Chi Town Alanna Evans, Jennifer Kramer, Anthony Burton. The Big Picture. Global Warming Overuse of Resources: Deforestation Intensive Farming Land Degradation Resource Depletion Waste Air, Soil, and Water Pollution Waste Management Pollution. Road Map. - PowerPoint PPT Presentation
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Green Roofs in Chi Town
Alanna Evans, Jennifer Kramer, Anthony Burton
The Big PictureGlobal Warming
Overuse of Resources:DeforestationIntensive FarmingLand DegradationResource Depletion
Waste
Air, Soil, and Water Pollution
Waste Management
Pollution..
Road Map•What are Green Roofs?•Analyze roofs’ reduction in:
–urban heat island effect–pollutants in the air–rainfall runoff
•How would implementing Green Roofs affect a city like Chicago?
William McDonough
•Cradle to Cradle- Sustainability
•Implementation of Chicago
•City Hall design
(McDonough 2006)
What are Green Roofs?• Green Roofs-gardens grown on top of a home
with waterproofing membrane underneath
• 2 types:– Extensive-mosses and other shallow-root
plants; little maintenance– Intensive-larger vegetation planted in
deeper soil
(Wikipedia 2006)
Our Hypothesis:• Implementing McDonough’s green roof
design on homes throughout the city of Chicago will reduce the urban heat island effect, reduce rainfall runoff, and improve air quality within the city.
Urban heat island effect
•Urban centers-ave. temps of 6-10° F higher
•Air temp over green roof-90° F•Air temp over standard roof-
102° F•Result: Lower need for air
conditioning (Czarnecki 2003)
Our Model
Stella Model for Urban Island
• ((Number of Standard Roofs*102)+((100 – Number of Standard Roofs)*90))/100
• 2% annual transformation rate• 13.3% homes left as std.• 91.6° F after 100 yrs
Reduction of Rainfall Runoff
• Runoff-precipitation waters that flow into uncontrolled water bodies
• Standard roof- 9% caught • Green roofs- 55% caught• Result- reduction in flooding
risks; inc. in water quality of nearby water bodies
(Mentens 2006)
Air Quality
• 1 m2 green roof- reduction of 0.2kg/yr of air particulate
• If 10% convert to green roofs: 2.6x106kg of particulates removed
• Result: cleaner, more breathable air
(Ardron 2006)
Excel Graph for Particulate Reduction
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2590
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Part
icu
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Red
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)
0 10 20 30 40 50 60 70 80 90 100Percentage of Houses
Air Particulate Reduction
Why Everyone Should Get OneReducedSummerTemps!!!
Improved water quality!!!
FewerFloods!!!
Less airPollution!!!
CitationsArdron, Keith. 2006. “Green Roof Benefits.”
<http://www.eltgreenroofs.com/greenroofs-benefits.html> (Oct 25, 2006).
Czarnecki, John E. 2003. “From the roof of city hall to rows of bungalows, Chicago goes green.” Architectural Record. 191 (2): 79-80.
McDonough, William and Michael Braungart. 2002. “The Living City : Nature, Design, and the Greening of Chicago .” <http://www.mcdonough.com/writings/living_city.htm#> (October 26, 2006).
Mentens, J., Raes D., and Hermy, M. 2006. “Green roofs as a tool for solving the rainwater runoff problem in the urbanized 21st century?” Landscape and Urban Planning. 77 (3): 217-226.
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