1. Professor, State Key Laboratory of Hydrology, Water Resources and Hydraulic Engineering, Hohai Univ., Nanjing 210098, China (corresponding author). E-mail: xichen@hhu.edu.cn
2. Ph.D. Student, State Key Laboratory of Hydrology, Water Resources and Hydraulic Engineering, Hohai Univ., Nanjing 210098, China.
3. Professor, State Key Laboratory of Hydrology, Water Resources and Hydraulic Engineering, Hohai Univ., Nanjing 210098, China.
4. Associate Professor, Dept. of Geography and Resource Management, The Chinese Univ. of Hong Kong, Hong Kong.
5. Senior Engineer, The Bureau of Hydrology, Huaihe River Commission, Bengbu, Anhui 233001, China.