Pluvial Flooding Risk Analysis and the Solutions to Risk Mitigation for Dangyang City in China

Abstract

This paper introduces Urban Storm Water Drainage and Localized Pluvial Flooding Mitigation Planning of Dangyang City of Hubei Province in China. With the help of ARCGIS、MIKE FLOOD and other software, we found that the two main courses of pluvial flooding in Dangyang city are the flash floods around the city and the insufficient drainage river. What’s more, the growth of hardening area and the weakness of storm sewer are two other reasons which increase the risk of pluvial flooding. Then, we gives several solutions for mitigation pluvial flooding risk based on analyzing the cause of pluvial flooding, identifying risk area and assessing the risk of pluvial flooding in Dangyang city. Finally, we proved that the given solutions can achieve good effect according to the simulation results with MIKE URBAN software.