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采用二维水沙数学模型,就西江金鱼沙开发利用工程对水流、河床演变的影响进行了研究,结果表明工程后金鱼沙河段水流平缓,各级流量下水面比降及流速均较小。工程虽导致金鱼沙左汊分流比有所增加,但主航道水流条件、水深与工程前没有明显差别。同时由于工程挖槽区域位于淤积区,五年末平均回淤厚度为0.47m,工程建成后需通过疏浚才能保持正常运行。
The two-dimensional mathematical model of water and sediment was used to study the influence of the development and utilization of goldfish sand on the water flow and river bed evolution in Xijiang River. The results show that the water flow in Jinyu Shahe section is gentle and the surface water ratio and flow rate are small at all levels. Although the project led to a diversion of goldfish sand left 有 increased, but the main channel flow conditions, water depth and no significant difference before the project. At the same time, since the area of the ditches in the project is located in the sedimentation area, the average back silting thickness at the end of the five-year period is 0.47m. After the completion of the project, it needs to go through dredging to maintain normal operation.