水库调度方式对三峡水库泥沙淤积的影响

运用一维非恒定非饱和输沙数学模型,计算分析不同调度方式下三峡水库的淤积过程及淤积量的变化,通过对比可以看出,汛期限制水位对三峡水库最终的淤积平衡具有重要影响.汛限水位在汛前、汛后一定范围内的变化及正常蓄水位在一定范围内的变化仅会改变水库的淤积过程,对水库的最终平衡淤积量影响不大.一定来水来沙情况下,汛期的坝前水位最终决定了水库淤积平衡后的淤积量.因此,在制定调度方案时要特别注意汛期的坝前水位及持续时间,这对减少三峡水库淤积、增大水库发电、防洪和航运效益具有重要意义.

Impact of operation regulation on sedimentation of Three Gorges Reservoir

Based on one-dimensional,unsteady flow and non-uniform sediment mathematical model,through analyzing the change of the sedimentation process and amount that is caused by the change of reservoir operation regulation,a conclusion is drawn that the reasonable change of the duration of flood period control water level and the definite range change of normal water level will only change the sedimentation developing process of TGR;these will not change the final silt-stable state.The holistic change of flood period control water level will not only change the sedimentation developing process but also change the silt-stable state.The flood period control water level is very pivotal to the silt-stable in the Three Gorges Reservoir.Then,the flood period control water level should be pay attention to when constituting the operation regulation.This has an important meaning to flood control,power generation and navigation.