TRANSIENT WAVE RUNUP, OVERTOPPING AND OVERFLOW MODELLING FOR INUNDATION SIMULATION DUE TO STORM SURGE

Abstract

 This study proposed a transient wave runup, overtopping and overflow model to improve the accuracy of simulated inundation due to extremely large storm surges, like for the design of Level II tsunami after the Great East Japan Earthquake and Tsunami. To make an inundation hazard map for such extreme storm surge is essential for risk management and evacuation plan. Since studies considering the transient phenomena of wave overtopping and overflow is few, the present study proposed such modelling using the Integrated Formula of wave Overtopping and Runup Modeling (IFORM) including wave runup which can give output for a criterion of coastal structure damage. The present model output is almost the same as that based on an experiment-based model.