| 挡潮闸下游河道冲淤的数值模拟 |
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| 引用本文： | 郑颖,谈广鸣.挡潮闸下游河道冲淤的数值模拟[J].武汉大学学报(工学版),2011,44(4):453-456. |
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| 作者姓名： | 郑颖 谈广鸣 |
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| 作者单位： | 武汉大学水资源与水电工程科学国家重点实验室,湖北武汉,430072 |
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| 基金项目： | 国家自然科学基金资助项目(编号:50679064) |
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| 摘 要： | 就挡潮闸下游河道水沙运动建立了一维水沙数学模型,采用Preissmann四点隐式差分格式离散非恒定水流方程,追赶法求解,并结合有限分析法思想离散求解悬移质泥沙方程.水流方程中,上游边界条件通过闸门的开度来控制.泥沙方程中,考虑床沙粒径变化并对床沙级配进行了调整.应用该模型对姚江陶家路闸闸下河道的水位、含沙量和河床变形进行了计算和验证.验证结果显示,水位与实测吻合,含沙量与实测增长趋势一致,河床断面反映了断面的基本变化,冲淤量与实测资料比较相符.表明该模型对挡潮闸闸门控制及闸下河床变形估算具有一定的指导意义.
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| 关 键 词： | 挡潮闸 河道冲淤 数值模拟 线性化Preissmann格式 |
Numerical simulation of erosion and siltation of downstream river at tidal gates |
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| ZHENG Ying,TAN Guangming.Numerical simulation of erosion and siltation of downstream river at tidal gates[J].Engineering Journal of Wuhan University,2011,44(4):453-456. |
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| Authors: | ZHENG Ying TAN Guangming |
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| Affiliation: | ZHENG Ying,TAN Guangming(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China) |
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| Abstract: | A runoff and sediment model is established to solve unsteady flow equation by Preissmann scheme and chase method;and the sediment equation is solved with finite element method.By applying this model,the water level,sediment concentration and riverbed deformation of Taojialu Tidal Gates are calculated and verified.The results of simulation are consistent with the measured data well. |
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| Keywords: | tidal gates erosion and siltation of river numerical simulation Preissmann scheme |
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