黄河下游宽河道平衡河宽的一种计算方法

发布时间：2018-04-28 14:44

本文选题：多来多排 + 高含沙洪水　；参考：《人民黄河》2016年04期

【摘要】：来沙量大、水沙搭配不合理以及游荡型河道断面宽浅是黄河下游宽河道淤积严重的主要原因。小浪底水库的建成和运用使得改变进入下游河道的水沙搭配成为现实。在列举已有关于窄深河槽"多来多排"的研究成果和实例的基础上,分析了形成"多来多排"现象的原因,认为高含沙洪水的输沙量并不是含沙量越高就越大,而是存在一个阈值,达到这一阈值即可实现"多来多排"。基于利津水文站资料,结合曼宁公式,得到了黄河下游宽河道平衡河宽的计算公式,得出黄河下游宽河道的平衡河宽为574 m,该计算结果与渭河、北洛河及黄河山东段河道实测资料相比是合理的。
[Abstract]:Large amount of sediment, unreasonable combination of water and sediment, and wide and shallow section of wandering channel are the main reasons for the serious deposition of the wide channel in the lower Yellow River. The construction and application of Xiaolangdi Reservoir make it possible to change the combination of water and sediment into the downstream channel. On the basis of enumerating the existing research results and examples of "more come and more discharge" in narrow and deep channel, this paper analyzes the causes of the phenomenon of "more come and more discharge", and considers that the sediment discharge of high sediment bearing flood is not the higher the sediment content is, the greater the sediment content is. But there is a threshold to achieve this threshold to achieve "multiple rows." Based on the data of Lijin hydrologic station and Manning formula, the calculation formula of the balance river width of the wide channel in the lower reaches of the Yellow River is obtained, and the balance river width of the wide channel in the lower reaches of the Yellow River is 574 m, which is similar to that of the Weihe River. It is reasonable to compare the measured data of the North Luohe River and the Shandong reach of the Yellow River.
【作者单位】：黄河水利科学研究院;河南黄河河务局;
【基金】：中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2014-15,HKY-JBYW-2014-20) 水利部公益性行业科研专项(201401002)
【分类号】：TV147

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