Numerical Analysis of the 2011 Tohoku Tsunami in Tokyo Bay Focusing on High Water Marks in Ports

摘要

The March 2011 earthquake off the Pacific coast of Tohoku was followed by great tsunami waves. The objectives of the present study are to apply the unstructured-mesh model FVCOM to tsunami propagation in Tokyo Bay and ports in the bay with high spatial resolution and to understand the mechanisms governing the tsunami properties in the bay. Through comparisons with the observed tide gauge data, it is found that the model can well reproduce tsunami propagation in the bay. The mechanisms causing difference in amplification of tsunami waves among in the ports of the bay (Chiba Port, Funabashi Fishery Port, Kisarazu Port, Yokohama Port, Kurihama Port and Yokosuka Port) are well identified.