Author(s): Taira Ozaki; Taisuke Ishigaki; Keiichi Toda
Linked Author(s): Keiichi Toda, Taisuke Ishigaki
Keywords: Urban flood; Damage level analysis; Storage pipe
Abstract: In recent years, heavy rainfalls over 50 or 100mm/hr attacked urban areas in Japan and induced inundation. The aim of this study is to estimate the inundation hazard and to calculate the flood reduction effect by a countermeasure of laying storage pipes in low-lying urbanized residential area. Inundation damage levels were calculated by applying two-hour rainfall of two cases of total rainfall; 60 and 100 mm. In calculations, the commercial computer software: Info Works-CS is used, which is a kind of the distributed models, effective rainfall, rainfall runoff, sewer flow and inundation flow can be considered. It is found that the risk of inundation in low-lying urbanized residential area by heavy rainfall can be estimated and effective countermeasure against the rainfall of return period from 5 to 10 years can be implemented.
Year: 2010