2015 Volume 21 Pages 461-466
Recently, localized torrential rain occurs frequently. The Kanda river basin is a highly-urbanized area located next to the Tokyo metropolitan area. In this area, most ground was paved, and highly density drainage network has been constructed under the ground. Because of such condition, rain water concentrates to the drainage pipe rapidly, and it flows into urban river. In this study, numerical simulation was conducted to investigate the process of urban inundation in this basin by considering the interaction between drainage system and river. As a result of this analysis, we found out the characteristics of inundation in this area. In addition, the process of inundation was clarified by forcusing on the characteristics of drainage system and reverse flow from river to drainage pipe.
