An Effective Tsunami Damage Estimation Method Considering Dike Height

Abstract

In Japan, the central and prefectural governments have conducted tsunami damagee stimation assuming non-failure of coastal dikes during earthquake and tsunamis. The maximum flood depth, from which damages to houses and humans were estimated, would vary with dike subsidence caused by earthquake motion, tsunami-induced dike failure, and topography in the hinterland. Many cases of tsunami simulation considering dike subsidence etc. are necessary for practical damage estimation, but cost much time and expense. Therefore, we developed an effective tsunami damage estimation method that does not need complicated tsunami simulations.