Key Laboratory of Mountain Hazards and Surface Process Chinese Academy of Sciences Chengdu 610041 China;
Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China;
University of Chinese Academy of Sciences Beijing 100049 China;
Key Laboratory of Mountain Hazards and Surface Process Chinese Academy of Sciences Chengdu 610041 China;
Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China;
University of Chinese Academy of Sciences Beijing 100049 China;
Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou 73000 China;