三峡水库变动回水区河床演变及航道整治

在系统总结前人对三峡水库变动回水区泥沙和航运问题研究主要成果的基础上,从三峡水库建库前的天然水文泥沙条件、河道边界形态及组成、河床演变规律、滩险及航道现状,建库后的水力因子变化、泥沙淤积分布及规律、河床变形及发展趋势、航道条件变化、上游来水来沙条件变化等方面,对建库后三峡变动回水区河段的演变规律及其影响因素进行了分析。在此基础上,对三峡水库变动回水区泥沙淤积对航道与港口的影响及其治理措施等进行了分析研究。

Fluvial process and waterway regulation in fluctuating backwater area of the Three Gorges

The research findings of sediment and navigation of the fluctuating backwater area in the Three Gorges engineering were summarized. Combining the working practice, the laws of fluvial process and influencing factors were analyzed based on the natural hydrological and sediment conditions, river boundary configuration and composition, riverbed evolutionary regularity and rapids and the present conditions of waterway before the construction of the Three Gorges and also the variation of hydraulic factors, distribution rules of sediment deposition, river bed development and tendency, variation of waterway condition and incoming water and sediment after construction. On this basis, the influence of sediment deposition on waterway and ports and the improve measures were also studied in this paper.