1. Professor, College of Water Conservancy and Hydropower Engineering, Hohai Univ., 1 Xikang Rd., Nanjing 210098, China; Experimental Teaching Center of Water Resources of Hohai Univ., 1 Xikang Rd., Nanjing 210098, China (corresponding author).
2. Postgraduate Student, College of Water Conservancy and Hydropower Engineering, Hohai Uni., 1 Xikang Rd., Nanjing 210098, China.
3. Postgraduate Student, College of Water Conservancy and Hydropower Engineering, Hohai Univ., 1 Xikang Rd., Nanjing 210098, China.
4. Senior Engineer, Dept. of Geotechnical Engineering, China Institute of Water Resources and Hydropower Research, Beijing 100038, China.
5. Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC 27695-7908.