Pumping-induced Well Hydraulics and Groundwater Budget in a Leaky Aquifer System with Vertical Heterogeneity in Aquitard Hydraulic Properties

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外文摘要：In groundwater hydrology,aquitard heterogeneity is often less considered compared to aquifers,despite its significant impact on groundwater hydraulics and groundwater resources evaluation.A semi-analytical solution is derived for pumping-induced well hydraulics and groundwater budget with consideration of vertical heterogeneity in aquitard hydraulic conductivity(K)and specific storage(Ss).The proposed new solution is innovative in its partitioning of the aquitard into multiple homogeneous sub-layers to enable consideration of various forms of vertically heterogeneous K or Ss.Two scenarios of analytical investigations are explored:one is the presence of aquitard interlayers with distinct K or Ss values,a common field-scale occurrence;another is an exponentially depth-decaying aquitard Ss,a regional-scale phenomenon supported by statistical analysis.Analytical investigations reveal that a low-K interlayer can significantly increase aquifer drawdown and enhance aquifer/aquitard depletion;a high-Ss interlayer can noticeably reduce aquifer drawdown and increase aquitard depletion.Locations of low-K or high-Ss interlayers also significantly impact well hydraulics and groundwater budget.In the context of an exponentially depth-decaying aquitard Ss,a larger decay exponent can enhance aquifer drawdown.When using current models with a vertically homogeneous aquitard,half the sum of the geometric and harmonic means of exponentially depth-decaying aquitard Ss should be used to calculate aquitard depletion and unconfined aquifer leakage.

作者：

ZHUANG Chao、Lü Chenyang、YAN Long、LI Yabing、ZHOU Zhifang、WANG Jinguo、DOU Zhi、Walter A.ILLMAN

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作者单位：

School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China

School of Geography,Earth and Environmental Sciences,University of Birmingham,Birmingham B15 2TT,U.K.

Department of Modern Mechanics,University of Science and Technology of China,Hefei 230027,China

Department of Earth and Environmental Sciences,University of Waterloo,Ontario N2L 3G1,Canada

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基金：

National Key Research and Development Program of ChinaNational Science Fourdation of ChinaNational Science Fourdation of ChinaNatural Sciences and Engineering Research Council of Canada(NSERC)

项目编号：

2019YFC18043014227227941902244

出版年：

2024

DOI：

10.1111/1755-6724.15135

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[1]	Chao Zhuang,Long Yan,Zhi-fang Zhou,et al.Estimation of aquitard hydraulic conductivity and skeletal specific storageconsidering non-Darcy flow[J].水科学与水工程,2021,14(4):269-276.

地质学报(英文版)

中国地质学会

地质学报(英文版)

CSTPCD

影响因子：1.414

ISSN：1000-9515

年,卷(期)：2024.98(2)

ZHUANG Chao,Lü Chenyang,YAN Long,et al.Pumping-induced Well Hydraulics and Groundwater Budget in a Leaky Aquifer System with Vertical Heterogeneity in Aquitard Hydraulic Properties[J].地质学报(英文版),2024,98(2):477-490.DOI:10.1111/1755-6724.15135.

参考文献量74