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天然河流上游修建大型水利枢纽后,必将引起水库下游河道的再造床。黄河小浪底水库自1999年10月下旬下闸蓄水以来,已运行十年有余。本文通过实测资料的分析,从河道的冲刷和河道的平面形态变化两方面来阐明小浪底水库拦沙运用十年来水库淤积及下游河道的再造床过程及其特点,为小浪底水库进一步水沙调控提供借鉴,也丰富了多泥沙河流兴建大型水库以后下游河道河床演变学科的内涵。
After the construction of large-scale water conservancy hubs in the upper reaches of the natural rivers, it will inevitably lead to the reconstruction of the lower reaches of the reservoirs. The Xiaolangdi Reservoir in the Yellow River has been in operation for more than 10 years since the sluice gate was closed in late October 1999. Based on the analysis of observed data, this paper clarifies the sedimentation of Xiaolangdi Reservoir sediment and the rebuilding process of the lower reaches of the river and the characteristics of sediment recovery in the Xiaolangdi Reservoir from two aspects of the erosion of the river channel and the change of the planar shape of the river channel, so as to provide reference for further water and sediment regulation of the Xiaolangdi Reservoir. , But also enriches the connotation of riverbed evolution in the lower reaches of the river after the large-scale reservoir is constructed.