Drainage simulation for confirming the importance of sewage facilities to mitigate long-term flood damage

Abstract

Long-term flood damage occurred during the 2011 Tohoku Region Pacific Offshore Earthquake Tsunami, which hindered rescue and restoration activities. To reduce long-term flooding damage, touhening such as earthquake resistance of drainage facilities including sewage is indispensable. In this research, we investigated the limit of the drainage function by the existing facilities against the supposed tsunami of the Nankai Trough massive earthquake in the Sumiyoshi area of Tokushima City. Tsunami calculation code JAGURS was used, and drainage analysis was performed using flooding analysis software AFREL for calculation inside the dam. At the same time, we evaluated the parallelization performance of tsunami calculation by JAGURS.