本文分析了三门峡水库控制运用以来的来水来沙条件及水库的调水调沙作用。初步探讨了水库调水调沙对黄河下游河道的造床流量、冲淤变化和纵比降的调整作用。最后,粗估了调节水沙过程对艾山以下河道的冲淤影响。 This paper analyzes the incoming and outgoing water and sediment conditions and the water and sediment regulation of the reservoir since the Sanmenxia Reservoir was put into operation. The effects of water and sediment regulation by water reservoir on the regulation of river bed flow, erosion and deposition and vertical plumbing in the lower reaches of the Yellow River are discussed preliminarily. Finally, it is estimated that the effect of water and sediment regulation on the scouring and silting of the following rivers in Ai Mountain.