1. Key Laboratory of Mountain Surface Processes and Ecological Regulation; Chinese Academy of Sciences; 610041 Chengdu P.R. China
2. Institute of Mountain Hazards and Environment; Chinese Academy of Sciences; 610041 Chengdu P.R. China
3. University of Chinese Academy of Sciences; Beijing 100049 P.R. China
4. Faculty of Agronomy, Department of Natural Resources and Environmental Management; University of Lubumbashi; PO Box 1825 Democratic Republic of Congo
5. UCD Dooge Centre for Water Resources Research, School of Civil Engineering; Newstead Building, University College Dublin; Belfield Dublin 4 Ireland
6. School of Life Science and Engineering; Southwest Jiaotong University; Chengdu 610031 P.R. China