A New Setting Method of Friction Parameter for Real-Time Tsunami Run-Up Simulations Based on Inundation Observations

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In this paper, we discuss ways of achieving more accurate tsunami run-up simulations, paying particular attention to themethod of setting the friction parameter for tsunami run-up obstacles. To achieve mitigation of a tsunami disaster,real-time tsunami run-up simulations and tsunami inundation warnings are very important issues. In recent years, tsunami observations and the amount of survey data collected have both increased. Using these data, we clarify the effect of landuse / land cover on tsunami run-up behavior to realize a tsunami run-up simulation. In this paper, we propose a new methodfor setting the friction parameter. First, we show the procedure for simulating a tsunami run-up phenomena and modeling theeffect of buildings. The effect of buildings means the effect of friction from buildings, which act as obstacles toa tsunami when it runs up to their location. Second, we show existing methods used to determine the friction parameterincluding this building effect. Then, we propose a new method to determine the friction parameter from observable data.Finally, we show the performance and robustness of this method using a statistical approach.
日本学術会議「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」の論文