| 支流河口水沙运动的二维数学模型研究——以长江上游的嘉陵江河口为例 |
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| 引用本文： | 陆永军.支流河口水沙运动的二维数学模型研究——以长江上游的嘉陵江河口为例[J].水利学报,1998(10):60-68. |
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| 作者姓名： | 陆永军 |
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| 作者单位： | 交通部天津水运工程科学研究所 |
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| 摘 要： | 本文建立了一个支流河口水沙运动的二维数学模型．采用贴体正交曲线坐标克服了干支流汇合处河道边界形状复杂的困难，给出了正交曲线坐标系下二维全沙模型的基本方程及数值计算方法．以长江上游的嘉陵江河口为例，分析了支流河口河段水沙特性及浅滩成因，模拟了汇合口河段流场及泥沙冲淤分布，计算值与实例值吻合良好．为支流河口浅滩演变及整治研究提供了一种新的模拟方法．
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| 关 键 词： | 支流河口，干流，悬移质，推移质，流场，河床冲淤，数学模型 |
Study on 2 D mathematical model of water and sediment movement at the branch river estuary |
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| Lu Yongjun.Study on 2 D mathematical model of water and sediment movement at the branch river estuary[J].Journal of Hydraulic Engineering,1998(10):60-68. |
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| Authors: | Lu Yongjun |
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| Abstract: | A 2 D mathematical model of water and sediment movement at the river estuary is established. Because of the complicated boundary conditions at the confluence, the goveming equations and numerical simulation of total sediment load are given in the boundary fitting orthogonal coordinate systems. By using this model, the characteristics of water and sediment as well as the cause of shoal at the confluence of Jialingjiang estuary on the upstream reach of the Yangtze River are analyzed. The velocity field and the erosion and deposition distribution are numerically simulated. The calculated results are in fair agreement with the field data. |
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| Keywords: | branch river estuary suspended load bed load velocity field erosion and deposition of river bed mathematical model |
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