Author(s): Naoki Hayami, Yoshihisa Kawahara
Linked Author(s): Yoshihisa Kawahara
Keywords: Inundation, probable maximum precipitation, Hiroshima city, drainage network, XPSWMM
Abstract: With rapid development in urban areas and the increase of extreme climate events due to global climate change, urban areas have become more vulnerable to flooding. Numerical simulations have been done using XPSWMM to clarify the inundation phenomena and associated damage in Hiroshima city when the probable maximum rain attacks the city without levee breach. The validity of the numerical simulation is discussed through comparisons between the numerical results and the actual records of inundated zones and water levels at pump stations. Then, the effects of structural measures such as construction of new drainage pipes and reinforcement of pump capacity on the depth and the duration of inundation were studied. It is found that the installation of new pipes is effective and hence to come before the others while the structural measures have limitation to reduce inundation areas
Year: 2017