Application of High-Resolution Topographic Model for Design and Planning of Tsunami Countermeasure and its Required Condition

Abstract

NAMIKAWAIn this study, run-up tsunami simulation with high-resolution topographic model is applied for design of tsunami countermeasure such as sea wall and breakwater in the case of coastal area in Sanriku. The topographic model of 10m grid DEM (Digital Elevation Model) is made by LiDAR (Light Detection and Ranging) data. The resolution of the altitude of LiDAR data is 15 cm. The behaviors of tsunami on the land with three plans of the countermeasure in the coast are carried out using tsunami simulation and compared. The effect to reduce the inundation area and damage, and the coast to construct them for each plan are discussed.