Calculation of store floodwater & sediment deposition on the Hechuan Reservoir in the Jiangling River

The construction of the Hechuan reservoir can store floodwater and reduce sediment deposition of the Yangtze river.This paper gives the dispatch plan of the water level in varies flow on draining off sediment.Moreover,based on the 1-D suspend sediment calculation for the sediment deposition course and position of sediment deposition,analysis on the ratio of draining off sediment sediment deposition had been done.