1. a Department of Earth Sciences, The University of Hong Kong, Hong Kong, China
2. b The University of Hong Kong–Shenzhen Research Institute, Shenzhen, China
3. c The University of Hong Kong–Zhejiang Institute of Research and Innovation, Hangzhou, China
4. d Beijing Laboratory of Water Resources Security, Capital Normal University, Beijing, China
5. e College of Resource Environment and Tourism, Capital Normal University, Beijing, China
6. f School of Geodesy and Geomatics, Wuhan University, Wuhan, China