Performance of the steady-state dipole flow test in layered aquifers

Xiang, Jiannan; Kabala, Z. J.

doi:10.1002/(sici)1099-1085(19971015)11:12<1595::aid-hyp489>3.0.co;2-0

Cited by 20 publications

(8 citation statements)

References 12 publications

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“…The cylindrical coordinate system as shown in Figure 1 is employed. The governing equation as well as the initial and boundary conditions can be described as (Sutton et al, 2000;Xiang & Kabala, 1997)…”

Section: Groundwater Flow Modelmentioning

confidence: 99%

“…The concept “dipole flow test” was first formally proposed to be a field‐tested technology by Kabala (1993) for the determination of vertical permeability. Since then, extensive studies of dipole flow were carried out through mathematical modeling, physical experiments and field site tests (Bodin et al, 2012; Hvilshøj et al, 2000; Johnson & Simon, 2007; Schaad, 1998; Simon et al, 2000; Sutton et al, 2000; Xiang & Kabala, 1997; Zlotnik et al, 2007; Zlotnik & Ledder, 1996; Zlotnik & Zurbuchen, 1998). For example, Xiang and Kabala (1997) analyzed the effects of hydraulic conductivity and location of layers as well as chamber size on the estimated hydraulic conductivity anisotropy ratio of layered aquifer; Sutton et al (2000) employed a streamtube modeling approach to interpret tracer test with dipole flow; Johnson and Simon (2007) employed in situ data of hydrogeological features and contaminant distribution in addition to chemical tracer test to form a robust protocol for characterizing flow pattern around VCW.…”

Section: Introductionmentioning

confidence: 99%

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Optimization Strategies for in Situ Groundwater Remediation by a Vertical Circulation Well Based on Particle‐Tracking and Node‐Dependent Finite Difference Methods

Wen

et al. 2020

Water Resources Research

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Both theory and application of multispecies reactive transport for in situ groundwater bioremediation involving a vertical circulation well (VCW) are not fully understood despite its importance and common usage in aquifer remediation practices. This study proposes novel approaches including two methods for design and remediation prediction of a VCW system, which involves multispecies, multiphase, and microbially enhanced reactive transport process. One is particle-tracking method, which depicts the trajectories of particles released from an injection chamber; the other is node-dependent finite difference (NDFD) method, which describes the advection-dispersion process based on the inflow and outflow directions at each node. The numerical results demonstrate that the particle-tracking method works well by yielding a useful index, that is, the recovery ratio, which helps optimize the in situ preliminary remediation screening. When biochemical parameters, dispersivities, and in situ contaminated conditions are known after the preliminary screening, the NDFD method performs better than the conventional Laplace transform finite difference method in terms of describing multispecies reactive transport with multiple phases in a VCW system. The proposed particle-tracking method and NDFD methods are employed to elucidate different effects of factors such as injection mode, hydraulic conductivity anisotropy ratio, distance between injection and extraction screened intervals, and injection/extraction rate on recovery and removal ratios. Our findings suggest that both methods are effective tools for optimization and prediction of VCW remediation in an anisotropic aquifer.

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Section: Groundwater Flow Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization Strategies for in Situ Groundwater Remediation by a Vertical Circulation Well Based on Particle‐Tracking and Node‐Dependent Finite Difference Methods

Wen

et al. 2020

Water Resources Research

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“…Moreover, permeameter estimates may require an up-scaling to field conditions to be representative. In order to overcome this burdens, several authors have proposed different hydraulic tests in wells to estimate K-anisotropy, such as the dipole-flow test using in one well (Kabala, 1993;Zlotnik and Ledder, 1996;Xiang and Kabala, 1997;Zlotnik and Zurbuchen, 1998;Hvilshøj et al, 2000;Sutton et al, 2000;Zlotnik et al, 2001) or two wells (Goltz et al, 2008), the single-well vertical interference test (Burns Jr et al, 1969;Hirasaki et al, 1974;Onur et al, 2002;Sheng, 2009;Paradis and Lefebvre, 2013), and hydraulic tomography (Paradis et al, 2015a(Paradis et al, , 2016a.…”

Section: Introductionmentioning

confidence: 99%

Comparison Between Hydraulic Conductivity Anisotropy and Electrical Resistivity Anisotropy From Tomography Inverse Modeling

Gernez

Bouchedda

Gloaguen

et al. 2019

Front. Environ. Sci.

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“…Early attempts were conducted using Galerkin finite element, partial tracing and boundary element methods (Herrling and Stamm ; MacDonald and Kitanidis ). Subsequently, more complex cases, such as layered and/or fractured aquifers, multi circulation wells, were considered (Xiang and Kabala ; Halihan and Zlotnik ; Goltz et al ). However, most of the models either assume a confined aquifer or simplify the free‐surface as an impermeable boundary in an unconfined aquifer, because it is computationally more complicated to consider the free surface (MacDonald and Kitanidis ).…”

Section: Introductionmentioning

confidence: 99%

Dual‐Screened Vertical Circulation Wells for Groundwater Lowering in Unconfined Aquifers

Jin¹,

Holzbecher

Sauter

2015

Groundwater

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A new type of vertical circulation well (VCW) is used for groundwater dewatering at construction sites. This type of VCW consists of an abstraction screen in the upper part and an injection screen in the lower part of a borehole, whereby drawdown is achieved without net withdrawal of groundwater from the aquifer. The objective of this study is to evaluate the operation of such wells including the identification of relevant factors and parameters based on field data of a test site and comprehensive numerical simulations. The numerical model is able to delineate the drawdown of groundwater table, defined as free-surface, by coupling the arbitrary Lagrangian-Eulerian algorithm with the groundwater flow equation. Model validation is achieved by comparing the field observations with the model results. Eventually, the influences of selected well operation and aquifer parameters on drawdown and on the groundwater flow field are investigated by means of parameter sensitivity analysis. The results show that the drawdown is proportional to the flow rate, inversely proportional to the aquifer conductivity, and almost independent of the aquifer anisotropy in the direct vicinity of the well. The position of the abstraction screen has a stronger effect on drawdown than the position of the injection screen. The streamline pattern depends strongly on the separation length of the screens and on the aquifer anisotropy, but not on the flow rate and the horizontal hydraulic conductivity.

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Performance of the steady-state dipole flow test in layered aquifers

Cited by 20 publications

References 12 publications

Optimization Strategies for in Situ Groundwater Remediation by a Vertical Circulation Well Based on Particle‐Tracking and Node‐Dependent Finite Difference Methods

Optimization Strategies for in Situ Groundwater Remediation by a Vertical Circulation Well Based on Particle‐Tracking and Node‐Dependent Finite Difference Methods

Comparison Between Hydraulic Conductivity Anisotropy and Electrical Resistivity Anisotropy From Tomography Inverse Modeling

Dual‐Screened Vertical Circulation Wells for Groundwater Lowering in Unconfined Aquifers

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