Abstract: We established physical model of sedimentation in 55km range in the reservoir area to study the sediment characteristics including sedimentation evolution and sedimentation amount. Two different scheduling modes of a reservoir was taken as case study. Research suggests that the control water level in flood period is very pivotal to the vertical distribution of reservoir sedimentation and the sedimentation at the reservoir tail. In the first 50 years of operation, the difference of sedimentation between the two scheduling modes is quite large: for the second mode, low water level in flood season is more conducive to sediment sluicing and deposition reduction. After 50 years of operation, the sedimentation in the two scheduling modes tends to be similar.

Key words: Wangjiatan, waterway regulation, reef-blasting, mathematical model, 3 000t ship