1. a College of Earth Sciences, Yunnan University, Kunming 650504, China
2. b International Rivers and Ecological Security Research Institute, Yunnan University, Kunming 650504, China
3. c Kunming Surveying and Mapping Institute, Kunming 650504, China
4. d Yunnan Remote Sensing Center, Kunming 650504, China
5. e School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China