[1] Coastal Dev Inst Technol, Inst Technol Disaster Management, Chiyoda Ku, Tokyo 1020092, Japan
[2] Port & Airport Res Inst, Yokosuka, Kanagawa 2390826, Japan
[3] Japanese Soc Civil Engineers, Coastal Engn Comm, Kyoto 6110011, Japan
[4] Kyoto Univ, Disaster Prevent Res Inst, Kyoto 6110011, Japan