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Studying the Impact of Different Green Rooftop Designs on Stormwater

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dc.contributor.advisor Maggioni, Viviana Gholoom, Alia
dc.creator Gholoom, Alia 2017-11-28 2018-05-14T18:28:33Z 2018-11-28T07:36:21Z
dc.identifier doi:10.13021/G8B11F
dc.description This thesis has been embargoed for 1 year and will not be available until November 2018 at the earliest. en_US
dc.description.abstract Green roofs are sustainable infrastructures used widely to reduce stormwater runoff, decrease urban heat island, improve air quality, and increase the aesthetic value of the urban environment. The hypothesis tested in this work is that the performance of green roofs can be enhanced if solar power panels are placed on top of the vegetated green roofs to provide shading and lower surface temperature and sun exposure. A research experiment was designed at the George Mason University campus in Fairfax, VA, to assess and quantify the impact of different rooftop configurations on stormwater with and without the presence of solar panels. Roof configurations included vegetated roofs, bare soil pallets, and experimental controls, i.e., traditional flat surfaces used for both residential and commercial building. Four water quality indicators – temperature, conductivity, pH, and Total Dissolved Solids (TDS) – were sampled during mid-May – mid-November 2017. Vegetated green roofs were able to reduce stormwater runoff when compared to any conventional roof and bare soil surfaces, thanks to leaf interception and root uptake. In terms of stormwater quality, bare soil and vegetated roofs showed a small decrease in stormwater temperature and a large increase in conductivity and TDS concentration, due to the fact that stormwater carries nutrients, metals, and suspended solids present in the soil through infiltration. However, vegetated green roofs were shown to decrease both conductivity and TDS with respect to the bare soil pallets and the deeper the soil substrate layer in the green roof, the larger improvement was observed. Moreover, vegetated roofs equipped with solar panels were able to overall reduce both conductivity and TDS. Thus, equipping vegetated roofs with solar panels has the potential to improve stormwater quality. en_US
dc.language.iso en en_US
dc.subject green roofs en_US
dc.subject solar power panels en_US
dc.subject water quality en_US
dc.subject runoff reduction en_US
dc.subject conductivity & total dissolved solids en_US
dc.subject bare soil layer en_US
dc.title Studying the Impact of Different Green Rooftop Designs on Stormwater en_US
dc.type Thesis en_US Master of Science in Civil, Environmental and Infrastructure Engineering en_US Master's en_US Civil, Environmental and Infrastructure Engineering en_US George Mason University en_US

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