Characteristic of rainfall in Shanghai and its influence on urban flood disaster

The change of precipitation during flood season in Shanghai, the accumulation distribution law of daily precipitation maximum in flood year were discussed and the impact of spatial precipitation distribution, rainstorm frequency, feature of rainstorm and climate factor in recent period on flood disaster in Shanghai was explored. The results show that the impact of flood season precipitation on flood disaster is complicated; heavy rainstorm or strong rainstorm is the main reason for flood disaster. Disaster hazard assessment method of climate factor was discussed and proposed, and the hazard assessment was made for recent influence of rainstorm disaster in each district (county) of Shanghai. The impact of rainstorm on Shanghai varies obviously ; there is bigger rainstorm disaster risk in Chongming, central urban, and Pudong New District; while smaller in southern part such as Qingpu, Jinshan, Fengxian, and Songjiang.