Midterm Colloquium by Zhenhua Sun – Niels Bohr Institutet - Københavns Universitet

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Midterm Colloquium by Zhenhua Sun

Environmental Benefits of Stormwater Runoff Reduction from Urban Green Infrastructure

Extensive urban development tends to increase the risk of stormwater runoff which contributes to the flooding in urban areas due to the increased imperviousness of the surface, loss of green natural space and often inadequate maintenance of sewage and drainage system. The expected large scale impacts caused by climate change will compound these risks in various ways, such as increased risks in the case of heavy precipitation and storm surge, etc. (Huong, H.T.L. and Pathirana, A., 2013).

The capacity and service level provided by existing sewage systems are already now challenged by these highly variable factors. As the severity and frequency of floods have considerably increased, there has been an increased public interest in how to design, operate and maintain effective stormwater management in the face of consequences resulted from climate change and, in particular, increased extreme precipitation events as well as rapid urban development.

Applying sustainable urban drainage systems and green infrastructure for runoff management provides promising solutions to many of these concerns (University affiliations, 2009). This study investigates the environmental benefits of surface runoff reduction with green infrastructure in urban environment, including runoff volume reduction and pollutant reduction.

Huong, H. T. L and Pathirana, A. (2013) Urbanization and climate change impacts on future urban flooding in Can Tho city, Vietnam. Hydrology and Earth System Sciences, 17, 379-394.

University affiliations (2009) Green Infrastructure for Los Angeles: Addressing Urban Runoff and Water Supply through Low Impact Development