Tsutomu Sakakiyama, Masafumi Matsuyama, Takumi Yoshii


Bottom topography change due to tsunami was experimentally investigated using a rectangular harbor model in a 2-D wave flume. Water surface level and velocity field were obtained as well to discuss the external forces. Accumulation region was observed in the middle of the harbor inside. Formed was conical bed topography. Erosion was around the accumulated region and at the breakwater head as local scour. These topography changes were caused by the tsunami-induced vortices inside the harbor and at the breakwater head.


tsunami; sand transport; topography change; vortex; water elevation level; velocity field

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DOI: http://dx.doi.org/10.9753/icce.v32.sediment.76