[1
] Graduate School of Environmental Studies, Hydrospheric-Atmospheric Research Center,
Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
[2
] Tateyama Caldera Sabo Museum, Toyama 930-1406, Japan
[3
] Department of Geography, Ritsumeikan University, Kyoto 603-8577, Japan
[4
] Department of Hydrology and Meteorology, Babar Mahal 406, Kathmandu 406, Nepal