NUMERICAL ANANLYSIS ON THE PROCESS OF URBAN INUNDATION CAUSED BY TORRENTIAL RAIN AND STORM SURGE IN TOKYO 23 WARDS

Abstract

 Damage by a typhoon and a local torrential rain occurs frequently at a various part of Japan. The appropriate measures to each water disaster that may occur in the future must be requested. In this research, assuming that a large-scale torrential rain and a storm surge occur at the same time, we made a flood prediction calculation by using flooding forecasting method S-uiPS. The flow which goes upstream a municipal river from coastal region is caused by a storm surge. As a result, even though the spot away from the river-mouth, there is the risk of the occurrence of the flow backward from river to sewage and the overflow from a river . This research is aimed to clarify such risks more clearly.