1. School of Geography and Planning
2. Sun Yat-sen University
3. Guangzhou 510275
4. China
5. China Institute of Water Resources and Hydropower Research
6. Beijing 100038
7. School of Geography and Tourism
8. Anhui Normal University
9. Wuhu 241000
10. Department of Hydraulic Engineering
11. Tsinghua University
12. Beijing 100084
13. State Key Laboratory of Hydroscience and Engineering