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引黄退水退沙监测工作主要是监测引黄灌区退入自然河道内的水沙情况,通过对自然河道的水位、流量、含沙量进行监测和计算整理,从而得出退水量。退水量的计算是整个工作的精髓所在,基流的准确程度直接影响到退水量计算的精确度,从大量的监测数据中可以看到目前采用的基流计算方法在水位波动频繁的情况下计算结果出现明显偏差,文章主要对基流计算时段的选择和计算进行分析和总结。
Yellow River Diversion and Sand Removal Monitoring work is mainly to monitor the Yellow River irrigation area into the natural river water and sand back to the situation, through the natural river water level, flow, sediment concentration monitoring and calculation to draw the amount of water. The calculation of the amount of backwater is the essence of the whole work. The accuracy of the base flow directly affects the accuracy of the calculation of the amount of backwater. From a large amount of monitoring data, we can see that the current calculation method of base flow is calculated under the condition of frequent fluctuations of the water level The results show obvious deviation, the article mainly analyzes and summarizes the choice and calculation of base flow calculation period.