Control of Seawater Intrusion through Injection-Extraction Well System

Mahesha, A.

doi:10.1061/(asce)0733-9437(1996)122:5(314)

Cited by 41 publications

(22 citation statements)

References 5 publications

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“…The saltwater/ freshwater interface and the way to characterize it have been studied through a wide variety of methods and models (Bear et al 1999;Werner et al 2013). Different approaches to counter or prevent saltwater intrusion have also been developed such as subsurface physical barriers (Bear et al 1999), recharge wells (Luyun et al 2011), pumping of brackish water (Mahesha 1996), withdrawal of freshwater through skimming wells and horizontal wells to reduce the upconing of seawater (Saeed et al 2002), freshwater extraction-injection doublets , etc. Various optimization methods have also been used in coastal aquifer management to define sustainable groundwater management schemes and to protect pumping wells from saltwater intrusion (Cheng et al 2000;Mantoglou 2003;Abarca et al 2006;Koussis et al 2010;Singh 2014).…”

Section: Introductionmentioning

confidence: 99%

Pueden los pozos hidrotermales someros en pares de ciclo abierto ayudar a remediar la intrusión de agua de mar?

Keuleneer

Renard

2015

Hydrogeol J

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Recharge through injection wells is a wellestablished technique to remediate and protect coastal aquifers from saltwater intrusion. In this study, it is shown that hydrothermal doublet installations can also be used to protect coastal aquifers while producing heat or cold for air conditioning. Such a method could be extremely valuable for situations where there is both a need for freshwater and energy production in coastal regions. The efficiency of the proposed approach is tested using Strack's analytical solution on a wide range of scenarios where the number of injection and pumping wells vary as well as the distance between these wells and the coast. The efficiency is evaluated through four control parameters: the relative freshwater volume, the maximum penetration distance of the saltwater toe, the thermal breakthrough time, and the percentage of injected water recycled. The analysis of these parameters computed for 343 scenarios confirms the efficiency of the method. Those results are extremely encouraging even if they still need to be confirmed through field experiments.

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Section: Introductionmentioning

confidence: 99%

Pueden los pozos hidrotermales someros en pares de ciclo abierto ayudar a remediar la intrusión de agua de mar?

Keuleneer

Renard

2015

Hydrogeol J

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“…Abstraction of saline water aims to reduce the volume of saltwater by extracting brackish water from the aquifer and disposing it to the sea (Sherif and Hamza 2001). The combination of injection of freshwater and extraction of saline water can reduce the volume of saltwater and increase the volume of freshwater (Rastogi et al 2004;Mahesha 1996c).…”

Section: Introductionmentioning

confidence: 99%

“…Mahesha (1996c) studied the control of seawater intrusion by a series of abstraction wells for saline water alone and combination with the freshwater injection wells in confined aquifer using a vertically integrated two dimensional sharp interface model under steady state condition. It was found that the combination of injection wells with extraction wells produced excellent results to the individual cases for larger well spacing and small rates of injection.…”

Section: Introductionmentioning

confidence: 99%

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A Cost-Effective Method to Control Seawater Intrusion in Coastal Aquifers

Abd-Elhamid

Javadi

2011

Water Resour Manage

110

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Intrusion of seawater into coastal aquifers is considered one of the most important processes that degrade water-quality by raising the salinity to levels exceeding acceptable drinking standards. Therefore saltwater intrusion should be prevented or at least controlled to protect groundwater resources. This paper presents a cost-effective method to control seawater intrusion in coastal aquifers. This methodology ADR (Abstraction, Desalination and Recharge) includes; abstraction of saline water and recharge to the aquifer after desalination. A coupled transient density-dependent finite element model is developed for simulation of fluid flow and solute transport and used to simulate seawater intrusion. The simulation model has been integrated with an optimization model to examine three scenarios to control seawater intrusion including; abstraction, recharge and a combination system, ADR. The main objectives of the models are to determine the optimal depths, locations and abstraction/recharge rates for the wells to minimize the total costs for construction and operation as well as salt concentrations in the aquifer. A comparison between the combined system (ADR) and the individual abstraction or recharge system is made in terms of total cost and total salt concentration in the aquifer and the amount of repulsion of seawater achieved. The results show that the proposed ADR system performs significantly better than using abstraction or recharge wells alone as it gives the least cost and least salt concentration in the aquifer. ADR is considered an effective tool to control seawater intrusion and can be applied in areas where there is a risk of seawater intrusion.

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“…Groundwater management models, e.g., hydraulic barrier and extraction systems for saltwater intrusion mitigation (Mahesha 1996;Mantoglou 2003;Reichard and Johnson 2005;Abarca et al 2006), rely heavily on groundwater flow and contaminant transport modeling to predict contaminant dynamics in the aquifer system. Simulationoptimization models have been extensively used to find the optimal actions for groundwater resource development, aquifer remediation and aquifer protection (Gorelick 1983;Yeh 1992;Ahlfeld and Heidari 1994;Wagner 1995;Mayer et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Bayesian model averaging assessment on groundwater management under model structure uncertainty

Tsai

2010

Stoch Environ Res Risk Assess

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This study introduces Bayesian model averaging (BMA) to deal with model structure uncertainty in groundwater management decisions. A robust optimized policy should take into account model parameter uncertainty as well as uncertainty in imprecise model structure. Due to a limited amount of groundwater head data and hydraulic conductivity data, multiple simulation models are developed based on different head boundary condition values and semivariogram models of hydraulic conductivity. Instead of selecting the best simulation model, a variance-window-based BMA method is introduced to the management model to utilize all simulation models to predict chloride concentration. Given different semivariogram models, the spatially correlated hydraulic conductivity distributions are estimated by the generalized parameterization (GP) method that combines the Voronoi zones and the ordinary kriging (OK) estimates. The model weights of BMA are estimated by the Bayesian information criterion (BIC) and the variance window in the maximum likelihood estimation. The simulation models are then weighted to predict chloride concentrations within the constraints of the management model. The methodology is implemented to manage saltwater intrusion in the ''1,500-foot'' sand aquifer in the Baton Rouge area, Louisiana. The management model aims to obtain optimal joint operations of the hydraulic barrier system and the saltwater extraction system to mitigate saltwater intrusion. A genetic algorithm (GA) is used to obtain the optimal injection and extraction policies. Using the BMA predictions, higher injection rates and pumping rates are needed to cover more constraint violations, which do not occur if a single best model is used.

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Control of Seawater Intrusion through Injection-Extraction Well System

Cited by 41 publications

References 5 publications

Pueden los pozos hidrotermales someros en pares de ciclo abierto ayudar a remediar la intrusión de agua de mar?

Pueden los pozos hidrotermales someros en pares de ciclo abierto ayudar a remediar la intrusión de agua de mar?

A Cost-Effective Method to Control Seawater Intrusion in Coastal Aquifers

Bayesian model averaging assessment on groundwater management under model structure uncertainty

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