Exposure Assessment of Rainstorm Waterlogging on Buildings in Central Urban Area of Shanghai Based on Scenario Simulation

Due to rapid urban development and land use and land cover changes,the waterlogging induced by torrential rain or typhoon in urban areas has been a global hotspot and a potential risk affecting the safety of urban buildings and interior property.This study applied a simplified urban waterlogging model to simulating the inundated water depth in central urban area of Shanghai under different scenarios.And each building was ranked according to its degree of exposure indicated by the inundation depth.Finally,the exposure of buildings to rainstorm waterlogging in central urban area of Shanghai under different scenarios was analyzed and evaluated.The results showed that the warehousing and the old-style residence are the most vulnerable building types when exposed to waterlogging disasters.On the whole,Yangpu District,Putuo District and Xuhui District are the important regions for the government to carry out safety defense,Changning District and Hongkou District have medium exposure rank,and the waterlogging brings little effects in Huangpu District,Jing'an District,Luwan District and Zhabei District.These results will provide references for the local government to improve waterlogging risk management.