夏军强, 王光谦, 吴保生. 黄河下游河床纵向与横向变形的数值模拟——Ⅱ二维混合模型的应用[J]. 水科学进展, 2003, 14(4): 396-400.
引用本文: 夏军强, 王光谦, 吴保生. 黄河下游河床纵向与横向变形的数值模拟——Ⅱ二维混合模型的应用[J]. 水科学进展, 2003, 14(4): 396-400.
XIA Jun-qiang, WANG Guang-qian, WU Bao-sheng. Numerical simulation for the longitudinal and lateral deformation of riverbed in the lower Yellow River, 1, establishment of a 2-D composite model[J]. Advances in Water Science, 2003, 14(4): 396-400.
Citation: XIA Jun-qiang, WANG Guang-qian, WU Bao-sheng. Numerical simulation for the longitudinal and lateral deformation of riverbed in the lower Yellow River, 1, establishment of a 2-D composite model[J]. Advances in Water Science, 2003, 14(4): 396-400.

黄河下游河床纵向与横向变形的数值模拟——Ⅱ二维混合模型的应用

Numerical simulation for the longitudinal and lateral deformation of riverbed in the lower Yellow River, 1, establishment of a 2-D composite model

  • 摘要: 对前文提出的平面二维混合模型进行了验证与实际工程应用.模拟了概化顺直河段在不同冲淤条件下的河岸后退过程.将混合模型应用于实际工程问题,模拟了黄河下游花园口游荡型河段的河床纵向与横向变形过程.通过对断面平均水位、流速分布、断面形态变化等计算值与原型观测值的对比,两者符合较好.表明该混合模型不仅能较好地模拟出河道内的水沙运动与河床纵向冲淤过程,而且能模拟出滩岸的后退与淤长过程,尤其能模拟滩岸的冲刷与崩塌过程.

     

    Abstract: The numerical model proposed in the previous paper is tested in this paper.Through simulating bank retreat processes for a schematic river reach under different bed score and deposition conditions,it indicates that the rate of bank retreat during scouring is greater than that in deposition.Then,the full bed deformation process of the Huayuankou Laitongzhai wandering reach in the lower Yellow River is simulated numerically,and good agreements are obtained between calculated and prototype-measured data such as the water level,velocity fields,and cross-sectional profiles variations.Both examples show that the proposed model is capable of simulating the longitudinal deformation of riverbed,and the process of bank retreat and advance,especially the bank lateral erosion and failure process.

     

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