Green Roofs in Chi Town Alanna Evans, Jennifer Kramer, Anthony Burton.

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Presentation transcript:

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 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 m 2 green roof- reduction of 0.2kg/yr of air particulate If 10% convert to green roofs: 2.6x10 6 kg of particulates removed Result: cleaner, more breathable air (Ardron 2006)

Excel Graph for Particulate Reduction

Why Everyone Should Get One Reduced Summer Temps!!! Improved water quality!!! Fewer Floods!!! Less air Pollution!!!

Citations Ardron, Keith “Green Roof Benefits.” (Oct 25, 2006). Czarnecki, John E “From the roof of city hall to rows of bungalows, Chicago goes green.” Architectural Record. 191 (2): McDonough, William and Michael Braungart “The Living City : Nature, Design, and the Greening of Chicago.” (October 26, 2006). Mentens, J., Raes D., and Hermy, M “Green roofs as a tool for solving the rainwater runoff problem in the urbanized 21st century?” Landscape and Urban Planning. 77 (3):