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A New Method for Estimating Recharge to Unconfined Aquifers Using Differential River Gauging

机译：用差分测河估算承压含水层补给量的一种新方法。

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摘要

In semiarid and arid environments, leakage from rivers is a major source of recharge to underlying unconfined aquifers. Differential river gauging is widely used to estimate the recharge. However, the methods commonly applied are limited in that the temporal resolution is event-scale or longer. In this paper, a novel method is presented for quantifying both the total recharge volume for an event, and variation in recharge rate during an event from hydrographs recorded at the upstream and downstream ends of a river reach. The proposed method is applied to river hydrographs to illustrate the method steps and investigate recharge processes occurring in a sub-catchment of the Murray Darling Basin (Australia). Interestingly, although it is the large flood events which are commonly assumed to be the main source of recharge to an aquifer, our analysis revealed that the smaller flow events were more important in providing recharge.
机译：在半干旱和干旱的环境中，河流泄漏是补给下层无限制含水层的主要补给源。差分河测被广泛用于估算补给量。但是，通常使用的方法的局限性在于时间分辨率为事件级或更长。在本文中，提出了一种新颖的方法，用于量化事件的总补给量和事件期间补给率的变化，这些补给率是从河流上游和下游记录的水位图中得出的。拟议的方法应用于河流水文图，以说明方法步骤，并研究在墨累达令盆地（澳大利亚）子集水区的补给过程。有趣的是，尽管通常认为大型洪水事件是补给含水层的主要来源，但我们的分析表明，较小的水流事件在提供补给中更为重要。

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  • 来源
    《Ground water》 |2014年第2期|291-297|共7页
  • 作者

    Andrew M. McCallum; Martin S. Andersen; R. Ian Acworth;

  • 作者单位

    Connected Waters Initiative, University of New South Wales, Sydney, NSW, Australia;

    Connected Waters Initiative, University of New South Wales,Sydney, NSW, Australia,National Centre for Qroundwater Research and Training (NCGRT), Australia;

    Connected Waters Initiative, University of New South Wales,Sydney, NSW, Australia,National Centre for Qroundwater Research and Training (NCGRT), Australia;

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