黄河下游弯曲河道挖河疏浚效果的数值模拟研究  

Numerical Simulation of Dredging Efficiency in the Lower Reach of the Yellow River

作　　者：方春明[1] 胡春宏[1] 吉祖稳[1] 

机构地区：[1]中国水利水电科学研究院泥沙所,北京100044

出　　处：《泥沙研究》2003年第3期43-47,共5页Journal of Sediment Research

基　　金：国家自然科学基金;水利部联合资助项目 ( 5 9890 2 0 0 )

摘　　要：作者针对黄河利津至渔洼河段 ,就不同挖河方案的回淤过程和挖河效果 ,采用平面二维数学模型进行了模拟研究 ,河道挖槽疏浚回淤过程一般规律的模拟结果与河工模型试验结果基本一致。挖槽后上游有较大冲刷 ,挖槽段回淤较快。在较长一段时间内 ,挖槽疏浚增加了河道输沙能力 ,降低了洪水位。挖槽横断面面积一定时 ,存在一个使挖槽淤积比最小的最佳挖槽形状。The deposition process and efficiency of different dredging plans conducted in the Yellow River from Lijin to Yuwa are simulated with 2-D model. The simulated general deposition process of dredging agrees with physical modeling. After dredging, the upper reach is eroded, and the dredged channel is deposited. For a long period, sediment-carrying capacity remains increased, and the water level remains lowed. The simulation reveals that, for a fixed cross section area of dredging, there is an optimal dredging shape, which gives the least deposition ratio.

关 键 词：黄河下游 弯曲河道 挖河效果 数值模拟 回淤过程 挖槽疏浚 河道整治 

分 类 号：TV851[水利工程—水利水电工程]