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| | Abstract | | When we use numerical simulation to understand geophysical phenomena, it is necessary to explain those phenomena in realistic structure models. In this study, we consider to use the Finite Difference Method (FDM) with in-equally spaced grids as a method for modeling realistic structures. We apply our method to tsunami disaster mitigation, considering the effects of the seafloor topography on the tsunami propagation. The simulated tsunami by conventional method based on the liner long wave theory does not show good agreement with the observed one, especially in later phases. We hypothesized that the simulation of tsunami propagation including the effects of the seafloor topography can solve the difficulty of prediction of tsunami in later phases. Comparing tsunami propagation in our method with that based on the conventional long wave theory, we discuss the effects of seafloor topography on tsunami propagation. We find that the tsunami propagation is influenced by two kinds of effects |
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