三峡水库泥沙淤积预估

Estimation of Sediment Deposition in Three Gorges Reservoir

在三峡工程可行性论证阶段，利用泥沙数学模型对三峡水库各种蓄水方案库区泥沙冲淤变化进行了预估。本文根据大量计算成果对三峡水库不同蓄水位方案的库区泥沙淤积量、淤积沿程分布、排沙率、保留库容、洪水位抬高等主要问题进行了论述，并分析了水库运用过程中泥沙冲淤变化特点。

At the stage of feasibility study of the Three Gorges Project ,the estimation of erosion anddeposit of sediment in reservoir region under various alternatives is made by using sediment mathematicmodel. Based on calculated results ,this paper made a study of such main problems of sedimentdeposition in reservoir area under different alternatives of storage level as amount of sedimentdepoition ,distribution of deposition along the upsiveam direction of the resevoir ,sediment outflowrate,reserve reservoir capacity and rising of flood stage ,etc. and analyzed the distingushing featureof sediment eroding and depositing in the process of reservoir operation