1. Ph.D. Student, National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong Univ., Chongqing 400074, P.R. China.
2. Professor, Key Laboratory of Hydraulic and Waterway Engineering, Chongqing Jiaotong Univ., Ministry of Education, Chongqing 400074, P.R. China (corresponding author).