WAVE OVERTOPPING AND OVERFLOW TRANSITION MODELING AND ITS INCORPORATION INTO A WAVE-SURGE COUPLING SIMULATION

Abstract

 This study carried out a transient wave overtopping and overflow modeling to improve the accuracy of simulated inundation due to extremely large storm surges, like in the worst-case scenario of a tsunami. Preparing an inundation hazard map for such extreme storm surges is essential for risk management and evacuation plan. Since existing studies considering the transient phenomena of wave overtopping and overflow are scarce, the present study proposes such modeling using two kinds of wave overtopping models that integrate wave runup and overtopping. The present model can be applied to seawalls from vertical and gentle slopes installed at deep water to very shallow water, even on land. The combined wave overtopping and overflow model was implemented into a wave-surge coupling simulation model to show the importance of the transient phenomena in inundation for simple cases of typical bathymetry and typhoon conditions.