1. Ph.D. Candidate, College of Hydrology and Water Resources, Hohai Univ., No. 1, Xikang Rd., Nanjing 210098, China (corresponding author).
2. Deputy Director, National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai Univ., No. 1, Xikang Rd., Nanjing 210098, China.
3. Lecturer, College of Hydrology and Water Resources, Hohai Univ., No. 1, Xikang Rd., Nanjing 210098, China.
4. School of Natural Resources, Univ. of Nebraska, Lincoln, NE 68583.
5. College of Hydrology and Water Resources, Hohai Univ., No. 1, Xikang Rd., Nanjing 210098, China.