Green Roof Water Retention: Reduction of Stormwater Runoff in the District of Columbia




Hovland, Erik Steven

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Green, vegetated, or living roofs can be defined as a roof that is partially or fully covered with a live plant material. Green roofs have gained momentum in cities over the past decade, as builders and city leaders have recognized their advantages over traditional roofing materials in terms of ecological functions, energy efficiency, and storm water management. This study evaluates the stormwater mitigation potential of green roofs in the District of Columbia. Using LIDAR data, coupled with masking and filtering techniques, roof area and slope will be calculated. Using the Mini-Model, provided by Limno-Tech Inc. and Casey Trees, three scenarios will be assessed where 20%, 50%, and 80% of the green roof potential will be achieved, and the consequential storm water management effect will be analyzed.



Green roof, Stormwater, Runoff, Sustainability, Green infrastructure, GIS