Assessment of urban rainstorm waterlogging risk and mitigation strategies based on climate change

Authors: Li Ruonan*, School of Geographic Sciences, East China Normal University, Shanghai 200241, China, Wang Jun, School of Geographic Sciences, East China Normal University, Shanghai 200241, China
Topics: Hazards, Risks, and Disasters
Keywords: climate change,mitigation strategies, pluvial flooding risk, scenario modeling
Session Type: Paper
Day: 4/13/2018
Start / End Time: 1:20 PM / 3:00 PM
Room: Napoleon D1, Sheraton 3rd Floor
Presentation File: No File Uploaded

Rapid urbanization leads to growing development of urban floods, which causes severe losses and impacts of urban inhabitants, properties and functions, particularly in the serviceability of urban infrastructures as well as transportation. In recent years, climate change and its consequences have affected the total components of the water cycle as well as rainfall intensity. In this way, incorporating climate change impact on urban pluvial flood could help to achieve more reliable results to be applied in real-time planning of urban areas through selection of mitigation strategies. The northern area of Huangpu district of Shanghai has been selected as the study area and constructed the urban pluvial flood model. Then the pluvial flood risk for current and three future climate scenarios is simulated and analyzed under three different rainfall return periods (10a, 50a and 100a). On this basis, feasibility of different mitigation strategies and their effectiveness in runoff reduction was analysis. The result showed that the increase of rainfall intensity under climate change greatly affects the risk of pluvial flood, and the flood risk under different rainfall scenarios could be well controlled by implementing a combination of mitigation strategies. This study will provide a scientific basis for flood response in urban areas.

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