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针对小浪底水库蓄水后泥沙淤积影响支流淤积的问题,以小浪底水库库区支流东洋河、西阳河为例,介绍了干流及支流泥沙观测断面的布置及测验方法,并分析了东洋河、西阳河泥沙淤积观测结果。结果表明,干流三角洲淤积体已在支流河口形成了拦门沙坎,致使支流河底纵向坡度变小甚至变为倒坡,这对小浪底水库运行及黄河干流及其支流排沙将产生不利影响,有必要深入研究并提出防治措施。
In view of the siltation of tributaries affected by sedimentation after the impoundment of Xiaolangdi Reservoir, taking the Dongyang River and Xiyang River as the tributaries of the Xiaolangdi Reservoir Area for example, the disposition and testing methods of the sediment observation sections of the mainstream and tributaries are introduced. , Xiyang River sediment deposition observations. The results show that the sediment of the mainstream of the Yangtze Delta has formed sand barns in the tributary estuary so that the longitudinal slope of the tributaries becomes smaller or even becomes the reverse slope. This will adversely affect the operation of the Xiaolangdi Reservoir and the sediment discharge of the mainstream of the Yellow River and its tributaries, It is necessary to further study and propose prevention measures.