Shiyin Liu¹, Kunpeng Wu², Junli Xu³, Yu Zhu² and Qiao Liu⁴, (1)Yunnan University, Kunming, China, (2)Institute of International Rivers and Eco-Security, Yunnan University, Kunming, China, (3)Department of Surveying and Mapping, Yancheng Teachers University, Yancheng, China, (4)IMHE Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China