南海トラフ巨大地震による津波の浸水深分布の空間相関特性の評価とシミュレーション

抄録

Buildings and infrastructures in coastal areas are exposed to the risk of damage from tsunami. In evaluating tsunami risk of spatial distributed networks or portfolio risk of an inventory of the buildings, spatial correlation in tsunami inundation depth distribution and analyzing many maps of inundation depth are an important consideration. This study attempts to analyze spatial variation and correlation in inundation depth distributions applying the mode decomposition technique based on singular value decomposition. In addition, inundation depth distributions are simulated by the mode synthesis. The present results suggest that the spatial correlation is affected by the slip zone of tsunami fault model and the simulation method is able to generate many maps of inundation depth which are preserving spatial correlation in original dataset.