东荆河下游河道防洪治理研究

发布时间：2018-05-30 00:27

本文选题：防洪治理 + 东荆河　；参考：《长江科学院院报》2016年07期

【摘要】：近年来东荆河下游出现洪水位持续偏高的问题,分析其原因在于:20世纪70年代东荆河治理中仅围挽了联合大垸而并未扩挖深水河槽,后经洲滩民垸持续围垦及淤积,造成杨林尾洪水位偏高。为解决该问题,在深入研究丹江口水库大坝加高后汉江防洪形势以及三峡水库蓄水后长江防洪形势变化情况的基础上,确定了新形势下东荆河下游河道治理标准采用东荆河来流4 250 m~3/s,相应汉口水位28.28 m,杨林尾控制水位31.0 m为宜;通过河槽疏挖等工程,有效扩大东荆河下游河道泄洪能力。在拟定的3种治理方案中,采用了二维水流数学模型进行比较,计算成果表明,保持现有堤距,扩挖深水槽的方案1具有投资少、施工易、降低洪水位效果明显的优点,因此将方案1确定为治理推荐方案。
[Abstract]:In recent years, the problem of the sustained high flood level in the lower reaches of Dongjing River is analyzed. The reason is that in the Dongjing River regulation in the 1970s, only the joint embankment was enclosed, but the deep water channel was not expanded, and then continuous reclamation and siltation were carried out through the marshland. The Yang Lin tail flood water level is high. In order to solve this problem, the flood control situation of the Hanjiang River after the dam of Danjiangkou Reservoir is raised and the situation of flood control of the Yangtze River after the three Gorges Reservoir is impounded are deeply studied. It is determined that under the new situation, the regulation standard of the lower reaches of Dongjing River is 4 250mt / 3 / s of Dongjing River, the corresponding water level of Hankou is 28.28 m and the control level of Yang Lin tail is 31.0 m, and the flood discharge capacity of the lower reaches of Dongjing River can be effectively expanded by dredging and dredging the channel. In the three control schemes, the 2-D water flow mathematical model is used to compare. The results show that the scheme 1, which keeps the distance between the existing dikes and expands the deep flume, has the advantages of less investment, easy construction and obvious effect of reducing the flood water level. Therefore, scheme 1 will be determined as a governance recommendation program.
【作者单位】：湖北省水利水电规划勘测设计院;武汉大学水资源与水电工程科学国家重点实验室;长江勘测规划设计研究院;湖北省汉江河道管理局;
【分类号】：TV87

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