3D TSUNAMI RUN-UP SIMULATION BY USING PARTICLE METHOD WITH GEOGRAPHY ANALYSIS MODEL INCLUDING BUILDING INFORMATION

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  • 建物群を含む地表面詳細モデルを用いた粒子法による三次元津波遡上解析

Abstract

 On March 11, the huge tsunami caused by the great east Japan earthquake devastated the Pacific coastal area of north-eastern Japan. After the earthquake, the disaster prevention and mitigation against Tsunami and earthquake is being reconsidered both in the ‘hard’ method like protective infrastructure constructions and in the ‘soft’ method including disaster evacuation education of policy maker and citizens. Accurate Tsunami simulation may become a useful tool for establishing a new Tsunami prevention guideline. In this study, we have developed a new 3D tsunami inundation simulation tool by the SPH method, which is one of meshless particle analysis. In our developed tool, geography including the outline of each building is modeled from data of the Geographic Information System in a high spatial resolution with high accuracy. In addition to the newly developed preprocessing tool, a new post-processing ‘photo realistic visualization’ of the particle simulation result is proposed in order to utilize the numerical simulation for the tsunami disaster evacuation education and the other ‘soft’ disaster prevention.

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