Abstract

Based on one-dimensional, unsteady flow and non-uniform sediment mathematical model, through analyzing the change of the deposition developing process and deposition amount that is caused by the change of reservoir operation regulation, a conclusion is made that the reasonable change of the duration of flood control water level and the definite range change of normal water level will change the deposition developing process of reservoir, but these will not change the final silt-stable state. The holistic change of flood control water level will not only change the deposition developing process but also change the silt-stable state. The flood control water level is very pivotal to the silt-stable in the Three Gorges Reservoir, once the change of the duration of flood water control level goes beyond the “degree”, the silt-stable state will also change. This has an important meaning to constitute the operation regulation.

Keywords: the Three gorges Reservoir; reservoir operation regulation; deposit process; sedimentation quantity; silt-stable