1. School of Civil Engineering, Sun Yat-sen University, Guangzhou, Guangdong, China;
2. Guangdong Engineering Technology Research Center of Water Security Regulation and Control for Southern China, Sun Yat-sen University, Guangzhou, Guangdong, China;
3. School of Geography and Planning, Sun Yat-sen University, Guangzhou, Guangdong, China;
4. Satellite Environment Center, Ministry of Ecology and Environment/State Environmental Protection Key Laboratory of Satellite Remote Sensing, Beijing, China;
5. School of Geographical Sciences, Taiyuan Normal University, Taiyuan, Shanxi, China