1. Department of Water Resources and Environment; Sun Yat-sen University; Guangzhou China
2. Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute; Sun Yat-sen University; Guangzhou China
3. School of Geography and Planning, and Guangdong Key Laboratory for Urbanization and Geo-simulation; Sun Yat-sen University; Guangzhou China
4. Department of Biological & Agricultural Engineering and Zachry Department of Civil Engineering; Texas A & M University; College Station TX USA
5. Zachry Department of Civil Engineering; Texas A & M University; College Station TX USA