1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu, P.R. China
2. University of Chinese Academy of Sciences, Beijing, P.R. China
3. School of Land and Resources, China West Normal University, Nanchong, P.R. China
4. College of Life and Environment Sciences, Minzu University of China, Beijing, P.R. China
5. College of Water Conservancy and Hydropower Engineering Yaan, Sichuan Agricultural University, Yucheng, P.R. China