Abstract

This article addresses the long-series sediment model research carried out for the dam region of the Three Gorges Project in the medium-posterior period of the project operation, when the underground power plant is put in utilization. The emphasis of the research has been placed on the sediment deposition and flow pattern upstream of the dam and the deposition topography in front of the inlet of the power plant, the surface velocity and flow pattern in front of the dam, the sediment concentration and grain diameter of the flow passing through the hydro generator sets etc. According to research results, some optimizing advices are put forward for improving diversion condition of the underground power plant in the posterior period of project operation.

Keywords: The Three Gorges Project, dam region, sediment deposition, velocity, power plant