1. Lecturer, College of Water Resource and Hydropower, Sichuan Univ., Chengdu 610065, China.
2. Professor, College of Water Resource and Hydropower, Sichuan Univ., Chengdu 610065, China (corresponding author).
3. Engineer, Water Resource and Hydropower, Chengdu Hydroelectric Investigation and Design Institute, Chengdu 610072, China.
4. Master Candidate, College of Water Resource and Hydropower, Sichuan Univ., Chengdu 610065, China.