1. a China Institute of Water Resources and Hydropower Research (IWHR) , Beijing , 100044 , China
2. b IWHR, International Research and Training Center on Erosion and Sedimentation , Beijing , 100044 , China
3. c University of Yamanashi , 4-3-11 , Kofu , Japan
4. d Department of Sedimentation in IWHR , Beijing , 100044 , China
5. e IWHR , Beijing , 100044 , China