[1] Tribhuvan Univ, Cent Dept Environm Sci, Kathmandu 44163, Nepal
[2] Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Tribhuvan Univ, Dept Geol, Trichandra Multiple Campus, Kathmandu 44600, Nepal
[5] Tribhuvan Univ, Cent Dept Hydrol & Meteorol, Kathmandu 44163, Nepal