Groundwater Circulation Well for Controlling Saltwater Intrusion in Coastal aquifers: Numerical study with Experimental Validation

Vats, Om Prakash; Sharma, B. Indrajit; Stamm, Jürgen; Bhattacharjya, Rajib Kumar

doi:10.1007/s11269-020-02635-z

Cited by 18 publications

(7 citation statements)

References 47 publications

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“…(f) Forming groundwater circulation well, allows a vertical circulation flow by pumping groundwater from the aquifers through a screen in a single well and injecting back into the aquifer through different screen. This vertical circulation forms a circular pattern between pumping and recharge screens acting as a hydraulic barrier for controlling SWI in coastal aquifers (Herrling et al 1991;Gonen and Gvirtzman 1997;Stamm 1998;Vats et al 2020). This technique is mostly suited for coastal areas (Prusty and Farooq, 2020), hence, PICs should employ this technique to prevent SWI.…”

Section: Physical Ways Of Preventing Swimentioning

confidence: 99%

A review of groundwater sustainability crisis in the Pacific Island countries: Challenges and solutions

Sharan

Lal

Datta

2021

Journal of Hydrology

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Section: Physical Ways Of Preventing Swimentioning

confidence: 99%

A review of groundwater sustainability crisis in the Pacific Island countries: Challenges and solutions

Sharan

Lal

Datta

2021

Journal of Hydrology

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“…Seawater intrusion in coastal aquifers is a worldwide problem caused, among other factors, by aquifer overexploitation related to human activities, such as irrigation and drinking water supply, and the reduction in natural groundwater recharge due to climate change [1]. To prevent or limit the deterioration of both surface water and groundwater quality due to salt-water contamination, research studies have been developed to fully comprehend the problem and identify its fundamental parameters, as well as to evaluate possible countermeasures, such as cut-off walls (e.g., [2][3][4][5][6][7][8][9][10][11][12]).…”

Section: Introductionmentioning

confidence: 99%

Large-Scale Physical Modeling of Salt-Water Intrusion

Crestani

Camporese

Belluco

et al. 2022

Water

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Salt-water intrusion (SWI) is a worldwide problem increasingly affecting coastal aquifers, exacerbated by climate changes and growing demand of fresh-water. Therefore, research on this topic using both physical and numerical modeling has been intensified, aiming to achieve better predictions of the salt-water wedge evolution and to design suitable countermeasures to its negative effects. This work presents a laboratory facility designed to conduct SWI experiments that can be used as benchmarks for numerical models. To this end, the laboratory facility has been designed to limit errors and provide redundant measurements of hydraulic heads and discharged flow rates. Moreover, the size of the facility allows us to monitor the salt-water wedge evolution by a specifically designed electrical resistivity tomography (ERT) monitoring system. To demonstrate the capabilities of the laboratory facility, we carried out a simple 36-h long SWI experiment in a homogeneous porous medium: during the initial 24 h the salt-water wedge evolved without any external forcing, while in the last 12 h, fresh-water was pumped out to simulate aquifer exploitation. The experiment was monitored through ERT and photos of the salt-water wedge collected at regular time intervals. The SUTRA code was used to reproduce the experimental results, by calibrating only the dispersivities. The ERT results show a good correlation with simulated concentrations between the borehole electrodes, the most sensitive zone of the monitored area, demonstrating that ERT can be used for laboratory evaluations of the salt-water evolution. Overall, the agreement between observed data, numerical simulations, and ERT results demonstrates that the proposed laboratory facility can provide valuable benchmarks for future studies of SWI, even in more complex settings.

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“…Seawater intrusion (SI) has become a common and serious phenomenon in coastal regions due to excessive withdrawal of groundwater (Vats et al 2020). Strengthening groundwater management is one of the most essential and effective measures for preventing SI.…”

Section: Introductionmentioning

confidence: 99%

Surrogate-Based Stochastic Multiobjective Optimization for Coastal Aquifer Management under Parameter Uncertainty

Zheng

Fan

et al. 2021

Water Resour Manage

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Linked simulation-optimization (S/O) approaches have been extensively used as tools in coastal aquifer management. However, parameter uncertainties in seawater intrusion (SI) simulation models often undermine the reliability of the derived solutions. In this study, a stochastic S/O framework is presented and applied to a real-world case of the Longkou coastal aquifer in China. The three conflicting objectives of maximizing the total pumping rate, minimizing the total injection rate, and minimizing the solute mass increase are considered in the optimization model. The uncertain parameters are contained in both the constraints and the objective functions. A multiple realization approach is utilized to address the uncertainty in the model parameters, and a new multiobjective evolutionary algorithm (EN-NSGA2) is proposed to solve the optimization model. EN-NSGA2 overcomes some inherent limitations in the traditional nondominated sorting genetic algorithm-II (NSGA-II) by introducing information entropy theory. The comparison results indicate that EN-NSGA2 can effectively ameliorate the diversity in Pareto-optimal solutions. For the computational challenge in the stochastic S/O process, a surrogate model based on the multigene genetic programming (MGGP) method is developed to substitute for the numerical simulation model. The results show that the MGGP surrogate model can tremendously reduce the computational burden while ensuring an acceptable level of accuracy.

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Groundwater Circulation Well for Controlling Saltwater Intrusion in Coastal aquifers: Numerical study with Experimental Validation

Cited by 18 publications

References 47 publications

A review of groundwater sustainability crisis in the Pacific Island countries: Challenges and solutions

A review of groundwater sustainability crisis in the Pacific Island countries: Challenges and solutions

Large-Scale Physical Modeling of Salt-Water Intrusion

Surrogate-Based Stochastic Multiobjective Optimization for Coastal Aquifer Management under Parameter Uncertainty

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