Based on the nature of reservoir sedimentation and consecutive accumulation of contaminants with sediment, the pollution caused by sediment deposition is noted to be one of the major sources of pollution to the reservoir of the Three Gorges Project (TGP) in the future. To preserve the water quality of the reservoir, one should therefore also pay close attention to such internal source of pollution induced by sedimentation, in addition to the control of point and non-point sources from the upland. Previously, the first two authors have suggested some schemes to optimize the operation of the TGP reservoir to increase flood control capacity and to minimize sediment deposition. Because such schemes of operation will lead to scour of the topmost layer of new deposition, which is the most active layer regarding adsorption of contaminants, it is also proposed as a research base to arrive at an all-round scheme for the control of flood, sediment, water quality and ecosystem in the reaches both...更多 up- and downstream of the TGP dam.