The effect of cutoff walls on saltwater intrusion and groundwater extraction in coastal aquifers

Kaleris, Vassilios; Ziogas, Alexandros I.

doi:10.1016/j.jhydrol.2012.11.007

Cited by 80 publications

(47 citation statements)

References 17 publications

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“…Numerical models and approximate analytical solutions were used by Kaleris and Ziogas [40] to study the influence of a cut-off wall on progression of SWI in scenarios with and without groundwater extraction. The analytical approximations are based on the inputs and outputs of the SUTRA model.…”

Section: Physical Subsurface Barriersmentioning

confidence: 99%

Management of Seawater Intrusion in Coastal Aquifers: A Review

Hussain

Abd-Elhamid

Javadi

et al. 2019

Water

117

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Seawater intrusion (SWI) is one of the most challenging and widespread environmental problems that threaten the quality and sustainability of fresh groundwater resources in coastal aquifers. The excessive pumping of groundwater, associated with the lack of natural recharge, has exacerbated the SWI problem in arid and semi-arid regions. Therefore, appropriate management strategies should be implemented in coastal aquifers to control the impacts of SWI problems, considering acceptable limits of economic and environmental costs. The management of coastal aquifers involves the identification of an acceptable ultimate landward extent of the saline water body and the calculation of the amount of seaward discharge of freshwater that is necessary to keep the saline–freshwater interface in a seacoast position. This paper presents a comprehensive review of available hydraulic and physical management strategies that can be used to reduce and control SWI in coastal aquifers. Advantages and disadvantages of the different approaches are presented and discussed.

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Section: Physical Subsurface Barriersmentioning

confidence: 99%

Management of Seawater Intrusion in Coastal Aquifers: A Review

Hussain

Abd-Elhamid

Javadi

et al. 2019

Water

117

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“…These methods allow for an increase in net gains of pumping but incur maintenance expenses and imply that some freshwater be used for the mitigation of saltwater intrusion. The sixth and final method involves the use of physical subsurface barriers such as cutoff walls and slurry walls [see Anwar , ; Kaleris and Ziogas , ; Luyun et al ., ; Nishikawa et al ., ]. The latter method is highly effective, but obtaining an effective installation at reasonable cost is difficult; flaws in the construction, such as gaps in a slurry wall, greatly reduce the effectiveness of the structure.…”

Section: Introductionmentioning

confidence: 98%

Reduction of saltwater intrusion by modifying hydraulic conductivity

Strack

Stoeckl

Damm

et al. 2016

Water Resources Research

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We present an approach for reducing saltwater intrusion in coastal aquifers by artificially reducing the hydraulic conductivity in the upper part of selected areas by using a precipitate. We apply a previously presented analytical approach to develop formulas useful for the design of artificial barriers. Equations for the location of the tip of the saltwater wedge are presented and verified through a sand‐tank experiment. The analysis is capable of computing discharges exactly, but requires the Dupuit‐Forchheimer approximation to compute points of the interface between flowing fresh and stationary saltwater. We consider a vertical coastline and boundaries in the freshwater zone of either given discharge or given head. We demonstrate in the paper that reduction of the hydraulic conductivity in the upper part of a coastal aquifer will result in a decrease of saltwater intrusion, and present analytic expressions that can be used for design purposes. The previously presented analytical approach can be applied to design systems to reduce saltwater intrusion caused by pumping inland from the zone that contains saline groundwater.

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“…In addition to that, secondary salinization, i.e., development of salinity due to human intervention, also affects 76 million ha of land area [1] worldwide. Ground water aquifers near coastal regions that are trapped under a permeable layer of rocks are susceptible to saltwater intrusion and degradation of water quality for agricultural use [3][4][5]. Typically, in South Florida, USA, sea level rise [6], saltwater intrusion, and high evaporation [7] results in high saline conditions, i.e., 40 to 60 PSU (practical salinity unit; g kg −1 ) [8], in the bay and agricultural area.…”

Section: Introductionmentioning

confidence: 99%

Effect of Salinity Stress and Microbial Inoculations on Glomalin Production and Plant Growth Parameters of Snap Bean (Phaseolus vulgaris)

et al. 2019

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Salinity is a major abiotic stress that can adversely affect plant growth, yield, other physiological parameters, and soil health. Salinity stress on biomass production of salt-sensitive crops, like snap bean (Phaseolus vulgaris), is a serious problem, and specifically in South Florida, USA, where saline soils can be found in major agricultural lands. Research studies focused on the ‘snap bean–Rhizobium–arbuscular mycorrhizal fungi (AMF)’ relationship under salinity stress are limited, and fewer studies have evaluated how this tripartite symbiosis affects glomalin production (GRSP), a glycoprotein released by AMF. A shade house experiment was conducted to elucidate the effects of three microbial inoculations (IC = inoculation control; IT1 = AMF and IT2 = AMF + Rhizobium) on three salinity treatments (SC = salinity control 0.6 dS m−1, S1 = 1.0 dS m−1, and S2 = 2.0 dS m−1) on snap bean growth and yield. Our results indicate that S2 reduced 20% bean biomass production, 11% plant height, 13% root weight, and 23% AMF root colonization. However, microbial inoculations increased 26% bean yield over different salinity treatments. Maximum salinity stress (S2) increased 6% and 18% GRSP production than S1 and SC, respectively, indicating the relative advantage of abiotic stress on AMF’s role in soil. Dual inoculation (IT2) demonstrated a beneficial role on all physiological parameters, biomass production, and GRSP synthesis compared to single inoculation (IT1) treatment with all three salinity levels.

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The effect of cutoff walls on saltwater intrusion and groundwater extraction in coastal aquifers

Cited by 80 publications

References 17 publications

Management of Seawater Intrusion in Coastal Aquifers: A Review

Management of Seawater Intrusion in Coastal Aquifers: A Review

Reduction of saltwater intrusion by modifying hydraulic conductivity

Effect of Salinity Stress and Microbial Inoculations on Glomalin Production and Plant Growth Parameters of Snap Bean (Phaseolus vulgaris)

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