1. Ministry of Water Resources of the People’s Republic of China, No. 2, Ln. 2, Baiguang Rd., Beijing 100053, China.
2. Dept. of Geotechnical Engineering, China Institute of Water Resources and Hydropower Research (IWHR), 20 Chegongzhuang West Rd., Beijing 100048, China (corresponding author).
3. Ministry of Water Resources of the People’s Republic of China, No. 2, Ln. 2, Baiguang Rd., Beijing 100053, China; and State Key Laboratory of Hydroscience and Engineering, Tsinghua Univ., Beijing 100084, China.
4. Bureau of Hydrology, Sichuan Province, Chengdu 610031, China.
5. Chengdu Hydropower Investigation, Design and Research Institute, CHECC, Chengdu 610072, China.