为了了解水利工程修建后河流天然水文情势受干扰的程度,针对黄河中上游流域特点,利用RVA法分析了万家寨、龙口梯级水库调度前后黄河中下游河道的水文条件变化情况。结果表明,黄河中游段水文条件因上游梯级水库的调度发生了较大变化,其中黄河中游段河曲断面的水文情势为中度改变。建议通过估算下游河道生态需水流量过程、优化水库调度方式来开展水库生态调度。 In order to understand the disturbance of the natural hydrological situation of the river after the construction of water conservancy project, according to the characteristics of the middle and lower reaches of the Yellow River, the hydrological conditions of the middle and lower reaches of the Yellow River before and after the Wanjiazhai and Longkou cascade reservoirs were analyzed by RVA. The results show that the hydrological conditions in the middle reaches of the Yellow River have changed greatly due to the dispatching of the upstream cascade reservoirs. The hydrological conditions of the meandering sections in the middle reaches of the Yellow River have been moderately changed. It is suggested to optimize reservoir ecological dispatch by estimating the ecological water flow of downstream rivers and optimizing the reservoir dispatching method.