1. Tokyo Institute of Technology, Department of International Development Engineering , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
2. Toyama Prefectural Government, Niikawa Public Works Center , 1–7 Shin-Sougawa Toyama City, Toyama 930-8501, Japan
3. Waseda University, Department of Civil and Environmental Engineering , Ookubo, Shinjuku-ku, Tokyo 169-8555, Japan