2020 Volume 76 Issue 2 Pages I_1049-I_1054
In the design of ports, to understand the behavior of tsunami acting on the various structures in the port during few hours is important. Therefore, in general, tsunami simulation with multiple nesting boundaries in the area from the large area including the tsunami source to the small area around the port structure is performed. In the minimum area targeting ports, 10 m resolution mesh and line boundaries which are insufficient to reproduce the structural shape such as breakwaters are often used. In this study, we performed numerical experiments with different spatial resolutions and shape of breakwaters and examined the characteristics of flow and bathymetry changes around breakwaters. As a result, it was clarified that there was no difference in flow and bathymetry change at the opening area of breakwaters and that the flow velocity and the scouring amount at the head of the breakwater were significantly different depending on the difference between the mesh resolution and the shape of the breakwater.
