Huiming Zhao¹, Yuefeng Zhang², Liqun Tang¹, Chonghao Wang³, Yuhai Wang¹, Dabin Liu¹, Chuansheng Guo¹ and Jing Lu⁴, (1)China Institute of Water Resources and Hydropower Research, Beijing, China, (2)Development Research Center of the Ministry of Water Resources of P. R. China, Beijing, China, (3)China Institute of Water Resources and Hydropower Research, Beijng, China, (4)China Institute of Water Resources and Hydropower Research(IWHR), Beijing, China