基于RVA法的黄河中游建库后河道水文变异分析

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。

Variation Analysis of Hydrological Situation in the Middle Reaches of Yellow River after Reservoirs Construction Based on Range of Variability Approach

In order to understand the interference degree of natural hydrological situation after construction of water conservancy project, the hydrological conditions of the upper and middle reaches of the Yellow River before and after the operation of the Wanjiazhai and Longkou cascade reservoirs were analyzed by using the RVA method. The results show that the hydrological conditions in the middle reaches of the Yellow River have changed greatly due to the scheduling of the upstream cascade reservoirs, and the hydrological regime of Dangqu cross section which located in the middle reaches of the Yellow River has been moderately changed. It is suggested that reservoir ecological regulation should be carried out by estimating the process flow of the downstream river water demand and optimizing the reservoir operation mode.