2014 Volume 62 Pages 167-178
In this paper, we discuss ways of achieving more accurate tsunami run-up simulations, paying particular attention to the method 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 land use / land cover on tsunami run-up behavior to realize a tsunami run-up simulation. In this paper, we propose a new method for setting the friction parameter. First, we show the procedure for simulating a tsunami run-up phenomena and modeling the effect of buildings. The effect of buildings means the effect of friction from buildings, which act as obstacles to a tsunami when it runs up to their location. Second, we show existing methods used to determine the friction parameter including 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.
