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

Abstract

 In recent years, tremendous disaster due to climate change is increasing and countermeasure is becoming more important. In this study, the process of urban inundation due to huge storm surge was analyzed numerically . It was elucidated that the process of inundation becomes complex because Tokyo metropolitan city is highly urbanized area and infrastructures such as sewege system are organized densely. The risk of inundation exists not only in coastal area but also in urban rivers basin or areas that sewage systems are in close formation. Taking measures in advance is important to lessen damage caused by inundation due to huge storm surge.