1. College of Water Conservancy and Hydropower Engineering, Hohai Univ., No. 1 Xikang Rd., Nanjing 210098, China (corresponding author).
2. Associate Professor, College of Water Conservancy and Hydropower Engineering, Hohai Univ., No. 1 Xikang Rd., Nanjing 210098, China.
3. Engineer, HydroChina Zhongnan Engineering Corporation, Ltd., No. 16 Xiangzhang East Rd., Changsha 410114, China.