This paper studies about flood disasters via drainage channels caused by tsunami, which may occur even if high seawalls protect coastal land area from tsunami. The flood could make loss of evacuation routes and be an obstacle to the safety measures, thus considering the countermeasures is important for industrial facilities from the points of view of business continuity. It was found that two phases numerical analysis consisting of water and air is applicable to simulate the flood disasters via drainage channels caused by tsunami comparing with that hydraulic physical model tests.
Appropriate seawalls can protect landside from tsunami inundation. But, in a case that a coastal industrial facility has an underground water channel, even if a seawall works properly against tsunami attack, sea water comes into landside via the channel. So, this study focused on tsunami inundation via an underground channel caused by tsunami. Numerical simulation methods were discussed and verified by using physical model test results.
Appropriate seawalls can protect landside from tsunami inundation. But, in a case that a coastal industrial facility has an underground water channel, even if a seawall works properly against tsunami attack, sea water comes into landside via the channel. So, this study focused on tsunami inundation via an underground channel caused by tsunami. Numerical simulation methods were discussed and verified by using physical model test results.