AUTOMATED BASE-FLOW SEPARATION AND RECESSION ANALYSIS TECHNIQUES
AUTOMATED BASE-FLOW SEPARATION AND RECESSION ANALYSIS TECHNIQUES
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DOI：
10.1111/j.1745-6584.1995.tb00046.x
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发表时间：
1995-11-01
期刊：
影响因子：
2.6
通讯作者：
BERNHARDT, G
中科院分区：
文献类型：
--
作者：
ARNOLD, JG;ALLEN, PM;BERNHARDT, G
一种自动化的碱基分离技术已经开发和测试。基流现在被认为是地下水对河流的贡献。基流量的估计可以从流的流量记录中得出。这种估算对于评估用于供水、水管理和污染评估的溪流的低流量特性至关重要。使用数字滤波器的自动基流分离技术已与其他三种自动技术和手动分离方法进行了测试。该过滤器在再现图形分离技术产生的结果的能力方面似乎可与其他自动化技术相媲美。该过滤技术易于使用，并且具有额外的优点，即它可以由用户根据个人喜好进行调整，将水流分离为表面流和基流。基流衰退的斜率被用来估计流域中高于河道水平的储水量，浅层含水层的补给量，并作为水预算模型的输入。第二种自动化技术是根据水流记录计算基流衰退曲线的斜率。这种技术是对主衰退曲线程序的一种改进。该方法的结果与人工估计的效率进行了比较，效率为74%。
An automated base now separation technique has been developed and tested. Base flow is considered to be the ground-water contribution to stream now. Estimates of the amount of base flow can be derived from stream flow records. Such estimates are critical in the assessment of low flow characteristics of streams for use in water supply, water management, and pollution assessment. An automated base flow separation technique using a digital filter has been tested against three other automated techniques and manual separation methods. The filter appears to be comparable to other automated techniques in its ability to reproduce the results produced from graphical separation techiques. The filter technique is easy to use and has the added advantage in that it can be adjusted by the user to take into account personnel preferences in separation of stream now into surface flow and base flow.The slope of the base flow recession has been used to estimate the volume of water in storage in the basin above the level of the stream channel, the amount of recharge to the shallow aquifer, and as an input into water budget models. A second automated technique was developed to calculate the slope of the base flow recession curve from stream flow record. This technique is an adaptation of the Master Recession Curve procedure. The results of this method were compared to manual estimates with an efficiency of 74 percent.