Contaminant transport in a small deformation aquitard affected by the delayed drainage phenomenon

Li, Zhaofeng; Zhou, Zhifang; Dai, Yongqiang; Huang, Yong; Guo, Qiaona; Zhou, Cuiying

doi:10.1002/hyp.11373

Cited by 8 publications

(6 citation statements)

References 40 publications

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“…Parameter values in section 3 are available through Wu et al (2010) and Li et al (2017). The test data in section 4 are accessible in the repository of Dryad (https://doi.org/10.5061/dryad.69p8cz8zm) and the supporting information files.…”

Section: Laboratory Apparatusmentioning

confidence: 99%

“…Groundwater is stored in aquifer and aquitard systems distributed over large areas, covering entire alluvial plains or sedimentary basins, such as the Dakota aquifer system in the United States and the Yangtze Delta in China (Dou et al, 2018;Konikow & Neuzil, 2007;Li et al, 2018;Zhou, Guo, & Dou, 2013). Abundant groundwater that is stored in aquitards, which recharges adjacent exploited aquifers (Li et al, 2016), is often neglected in the evaluation of groundwater resources (Konikow & Neuzil, 2007;Li et al, 2017;Zhou, Guo, & Dou, 2013). An accurate groundwater resource assessment is essential in effective management and sustainability of groundwater resources (Alley & Leake, 2004;Gleeson et al, 2010Gleeson et al, , 2012.…”

Section: Introductionmentioning

confidence: 99%

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An Analytical Method to Calculate Groundwater Released From an Aquitard Undergoing Nonlinear Consolidation

Luo

et al. 2020

Water Resources Research

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Section: Laboratory Apparatusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Analytical Method to Calculate Groundwater Released From an Aquitard Undergoing Nonlinear Consolidation

Luo

et al. 2020

Water Resources Research

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“…Substituting (A.8) into (A.2) gives the form solution of (12), (13), (14), and (15) in the main text as…”

Section: Appendixmentioning

confidence: 99%

“…The understanding of the groundwater dynamics and water balance is of great importance to the prediction, evaluation, and control of land subsidence, and it is also meaningful to the groundwater resource evaluation and exploitation, as well as the analysis of contaminant and heat transport in the aquifer system [13][14][15]. Many studies have recently been carried out in terms of the groundwater flow and depletion in the aquitard.…”

Section: Introductionmentioning

confidence: 99%

Delayed Drainage of a Largely Deformed Aquitard due to Abrupt Water Head Decline in Adjacent Aquifer

Zhou

et al. 2018

Geofluids

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A governing equation of drawdown was put forward to describe the one-dimensional large-strain consolidation behavior of an aquitard without consideration of the creeping effect. An analytical solution was derived to characterize the drawdown variation in the aquitard subjected to sudden hydraulic head decline in adjacent confined aquifer. The characteristics of the groundwater dynamics and water balance in the aquitard have been analyzed based on the analytical solution. A comparison analysis of results has been made between the large-strain theory and the classical small-strain theory. The type-curve fitting method was used to determine the hydrogeological parameters, on the basis of the observed variations of aquitard deformation with time. The analytical solution was thus validated by a comparison with the observed experimental results. It is found that the water drainage of aquitard is obviously delayed in response to the water head decline in the adjacent aquifer. All delayed water release from the aquitard terminates when the consolidation time reaches the value of l2/cv0. The aquitard deformation predicted by the large-strain theory is less than that given by the small-strain theory, and the prediction discrepancy of these two theories increases with the increasing soil compressibility.

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“…Many studies in recent decades have been conducted to investigate the effect of consolidation on solute transport through single clay liner or composite liner system (e.g., CCL, GMBL/CCL and GMBL/GCL/CCL) including field studies, 10 experimental investigations 11–14 and numerical analysis 4,7–9,15–26 . The above studies highlighted the importance of consolidation on contaminant transport through the liner system.…”

Section: Introductionmentioning

confidence: 99%

Analytical solution for one‐dimensional steady‐state contaminant transport through a geomembrane layer (GMBL)/compacted clay layer (CCL)/attenuation layer (AL) composite liner considering consolidation

Yan

Xie

Ding

et al. 2022

Num Anal Meth Geomechanics

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A composite liner system consisting of a geomembrane layer (GMBL), a compacted clay layer (CCL) and an attenuation layer (AL) is widely used in the modern landfills. The field and experimental observations highlight the potential detrimental effects on breakthrough of contaminants induced by consolidation of soil liner when a relatively high applied stress is caused by the waste placement. A one dimensional steady‐state model is developed to investigate the behaviour of contaminant transport in GMBL/CCL/AL composite liner system considering consolidation. Effects of the consolidation process on the transport of typical contaminants are investigated by the proposed analytical solution. The analytical results show that the magnitude of volume compressibility coefficient in the AL is important in controlling the overall magnitude of the consolidation induced effects. The process of consolidation shows a larger impact on the absorbable pollutants compared to the non‐absorbable pollutants. This may be due to the fact that the migration of solid particles induced by the consolidation may assist the transport of contaminant absorbed on them. The thickness of the AL shows large impacts on the bottom flux for the case with a high volume compressible coefficient. Increasing the thickness of AL from 1 to 3 m can results in a factor of 2.6 increase of the bottom flux. Increasing the thickness of the AL leads to a larger consolidation advection and a longer consolidation path, which may be the dominant mechanisms for contaminant transport compared to the diffusion process.

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Contaminant transport in a small deformation aquitard affected by the delayed drainage phenomenon

Cited by 8 publications

References 40 publications

An Analytical Method to Calculate Groundwater Released From an Aquitard Undergoing Nonlinear Consolidation

An Analytical Method to Calculate Groundwater Released From an Aquitard Undergoing Nonlinear Consolidation

Delayed Drainage of a Largely Deformed Aquitard due to Abrupt Water Head Decline in Adjacent Aquifer

Analytical solution for one‐dimensional steady‐state contaminant transport through a geomembrane layer (GMBL)/compacted clay layer (CCL)/attenuation layer (AL) composite liner considering consolidation

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