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DAMAGE ALONG COASTS IN SENDAI BAY CAUSED BY THE 2011 GREAT TSUNAMI

2012; Coastal Engineering Research Council; Issue: 33 Linguagem: Inglês

10.9753/icce.v33.currents.13

2156-1028

Kazuya Sakai, Takaaki UDA, Toshiro SAN-NAMI, Tatsuya Shimizu,

Coastal and Marine Dynamics

A great earthquake with a magnitude of 9.0 occurred on March 11, 2011, with an epicenter 130 km offshore of the Oshika Peninsula in Miyagi Prefecture. After the earthquake, a giant tsunami inundated a large area along Japan's eastern coastline. We carried out field observations to investigate the damage to Arahama Town and the formation of a trench as a result of local scouring by the jet flow over the coastal dike. Here, the results of the field observations on the inundation of the tsunami into a wide residential area on Shobuta Beach and in Arahama Town were reported. Then, the destruction of the coastal dike, as well as the formation of a large trench immediately behind the coastal dike due to the tsunami overflow on the Yamamoto coast, was investigated, where the tsunami height reached up to 19.2 m above mean sea level (MSL), estimated from the run-up height on the slope of a hill.