抄録
Tsunami damages and inundation characteristics on Sanriku southern coast due to The 2011 off the Pacific Coast of Tohoku Earthquake were investigated by conducting field survey and numerical simulation with a two-dimensional depth-integrated tsunami flow model. From the field survey, it was found that the run-up height in Toni Hongo has reached T.P.+20m which corresponds to a four or five-storied building and many coastal structures were destroyed by tsunami attack. The numerical results revealed that the first wave with a height of over T.P.+10m hit Sanriku southern coast after approximately 30 minutes from the occurrence of the earthquake. Moreover, inland area distant from the shoreline was also found to be greatly damaged by river run-up of tsunami.
