Environmental Benefits Of Green Roofs

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There are several ecological and environmental benefits of green roofs which have consequentially brought in increasing interests in this technology. A green roof, as a “carpeting” of plants on the roof of buildings, offers many benefits in addition to enhancing its aesthetic value. Primarily, green roofs have the ability to delay the storm runoff peak occurrence, thus reducing the peak flow rate and mitigating flood risks. Another benefit is its thermal insulation potential that reduces the urban heat island effect. They also help with pollution abatement, carbon sequestration, biodiversity conservation, and general improvement of life quality in urban ecosystems (Xiaosheng et al. 2014).

Green roofs generally consist of a rather simple layering covering the rooftop, including a waterproof layer, a water retention layer and a drainage/filter layer topped with substrate with different depths according to both maximum load capacity of the roof and vegetation type to be grown (Nardini et al. 2012). However, while there has not so much attention about the relative importance of vegetation structure and composition in determining the ecosystem and technical functions of green roofs, in the last years, a number of studies have reported significant impacts of vegetation type on stormwater runoff management (VanWoert et al. 2005).

In this paper, I aim to review existing research literature and summarize the process and importance of vegetation selection criteria for
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