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中文摘要：
分析了圣维南方程在感潮河段水流模拟应用情况,指出了圣维南方程在感潮河段直接应用不仅存在理论结构缺陷,而且还存在理论与计算结果的矛盾,并采用实际感潮河段的计算结果揭示了问题的原因。考虑潮水波动能对水流的驱动作用,创建了以潮水波内动能转化的驱动力微分模型,改进了圣维南方程模型结构,采用长江河口段水流资料进行了模拟检验,初步验证表明,改进的模型较好地解决了圣维南方程在感潮河段水流模拟应用存在的问题,且模拟精度也有较大提高。
英文摘要：
Some application problems of the Saint-Venant equations in tidal rivers were analyzed in this paper.It is found that the Saint-Venant equations have some shortages in the theory and structure for flow simulation in tidal rivers,resulting in the contradiction between the theory and calculated results.The corresponding reasons were given from the calculated results in real tidal rivers.In terms of the effect of the driving force on river flow caused by tidal energy,a driving force differential model accounting for tidal effect was established,which can improve the structure of the Saint-Venant equations.The simulation results in the tidal reach of the Changjiang River show that the proposed model based on the improved Saint-Venant equations can obtain better performance than that based on the Saint-Venant equations.
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