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Use of Groundwater Level Fluctuations near an Operating Water Supply Well to Estimate Aquifer Transmissivity.
Ground Water ( IF 2.6 ) Pub Date : 2020-05-20 , DOI: 10.1111/gwat.13018
Sergey Pozdniakov , Pavel Ivanov 1 , Paul Davis 2 , Nikolay Sizov 3
Affiliation  

We developed a method to estimate aquifer transmissivity from the hydraulic‐head data associated with the normal cyclic operation of a water supply well thus avoiding the need for interrupting the water supply associated with a traditional aquifer test. The method is based on an analytical solution that relates the aquifer's transmissivity to the standard deviation of the hydraulic‐head fluctuations in one or more observation wells that are due to the periodic pumping of the production well. We analyzed the resulting analytical solution and demonstrated that when the observation wells are located near the pumping well, the solution has a simple, Dupuit like form. Numerical analysis demonstrates that the analytical solution can also be used for a quasi‐periodic pumping of the supply well. Simulation of cyclic pumping in a statistically heterogeneous medium confirms that the method is suitable for analyzing the transmissivity of weakly or moderately heterogeneous aquifers. If only one observation well is available, and the shift in the phase of hydraulic‐head oscillations between the pumping well and the observation well is not identifiable. Prior knowledge of aquifer's hydraulic diffusivity is required to obtain the value of the aquifer transmissivity.

中文翻译:

使用供水井附近的地下水位波动来估算含水层的透射率。

我们开发了一种方法,可以根据与供水井正常循环运行有关的水头数据来估算含水层的透射率,从而避免了与传统含水层测试有关的中断供水的需求。该方法基于一种分析解决方案,该解决方案将含水层的透射率与一口或多口观测井中水头波动的标准偏差相关联,该标准偏差是由于生产井的定期抽水造成的。我们分析了所得的分析解决方案,并证明了当观察井位于抽水井附近时,该解决方案具有简单的类似于Dupuit的形式。数值分析表明,该分析解决方案也可用于准周期性抽水供应井。在统计非均质介质中进行循环泵送的模拟证实了该方法适用于分析弱或中等非均质含水层的透射率。如果只有一个观察井,并且泵井和观察井之间的水头振荡的相位变化是无法确定的。需要获得含水层水力扩散率的先验知识才能获得含水层透射率的值。
更新日期:2020-05-20
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