不同治理方案下黄河下游河道的冲淤变化研究

发布时间：2018-04-18 18:28

本文选题：水沙数学模型 + 输沙能力　；参考：《人民黄河》2017年12期

【摘要】：为定量比较黄河下游河道现状治理方案(简称为宽河方案)及"两道防线"模式中的防护堤窄河方案(属于常态下的窄河方案)下的河床冲淤变化,通过适用于长历时与长河段的准二维水沙数学模型,引入河床综合稳定性指标作为河相关系均衡调整准则,针对未来黄河年均来沙分别为3亿、6亿、8亿t这3种50 a水沙系列条件进行了模拟计算。结果表明:在来沙量客观上明显减少的趋势下,窄河治理方案不仅有利于滩区的防洪减灾,而且比现状治理方案更有利于河床减淤;若采取年均6亿、8亿t的多沙系列条件开展计算,则窄河方案比宽河方案在小浪底—花园口河段和花园口—高村河段的减淤效果都明显,而高村—艾山河段略有增淤,艾山—利津河段淤积量亦有所减小。
[Abstract]:In order to compare quantitatively the river bed scour and siltation changes under the current control scheme of the lower reaches of the Yellow River (referred to as the broad river scheme) and the narrow river protection scheme (which belongs to the narrow river scheme under normal condition) and the "two lines of defense" model.Based on the quasi-two-dimensional hydro-sediment mathematical model suitable for long duration and long river section, the comprehensive stability index of river bed is introduced as the equilibrium adjustment criterion of river facies relationship.According to the three kinds of water and sediment series conditions of the future Yellow River, which are 300 million, 600 million and 800 million tons per year, respectively, three kinds of water and sediment series conditions for 50 years are simulated and calculated.The results show that the narrow river control scheme is not only beneficial to flood control and disaster reduction in the beach area, but also more favorable to the river bed silt reduction than the current control scheme.If the calculation is carried out under the conditions of 600 million tons per year and 800 million tons per year, the narrow river scheme is more effective than the wide river scheme in reducing siltation in the Xiaolangdi-Huayuankou and Huayuankou-Gaocun reaches, while the Gaocun-Aishan reaches have a slight increase in siltation.Aishan-Lijin reach also reduced the amount of siltation.
【作者单位】：清华大学水沙科学与水利水电工程国家重点实验室;青海大学省部共建三江源生态与高原农牧业国家重点实验室;
【基金】：国家重点研发计划项目(2016YFC0402500)
【分类号】：TV147

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