Determining the interaction between groundwater and saline water through groundwater major ions chemistry

Mondal, N. C.; Singh, Vijay P.; Singh, V. S.; Saxena, V. K.

doi:10.1016/j.jhydrol.2010.04.032

Cited by 276 publications

(104 citation statements)

References 64 publications

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“…The average mixing rate of freshwater and seawater during pre-monsoon is 24.2%, whereas it is 13.5% in post-monsoon. The ionic change values clearly display the hydrochemical process that takes place along the seawater and freshwater mixing zone in coastal aquifers (Mondal et al 2010a(Mondal et al , 2010b. The hydrochemistry of groundwater along such coastal aquifers is very much intricate to study and it varies with respect to space and time (Mondal et al 2010a Figs.…”

Section: Hydrochemical Facies Evolution For Identifying Seawater Intrmentioning

confidence: 99%

“…In general, the freshwater possesses higher concentration of calcium and bicarbonates due to dissolution of carbonates along the coastal aquifer (Mondal et al 2010a (Figs. 6a, c d, 7a, b, d; Mondal et al 2010a).…”

Section: Hydrochemical Facies Evolution For Identifying Seawater Intrmentioning

confidence: 99%

“…6a, c d, 7a, b, d; Mondal et al 2010a). The ionic exchange values of sodium and potassium are highly negative and sulphate is highly positive (Figs.…”

Section: Hydrochemical Facies Evolution For Identifying Seawater Intrmentioning

confidence: 99%

“…Overexploitation of bore wells at transition zone or at deeper depths along coast leads to salinization of groundwater (Ayolabi et al 2013). Tsunamis, and Tidal and estuarine activities cause infiltration of seawater into coastal aquifers of shallow depth (Mondal et al 2010a;Longe et al 1987;Saxena et al 2003;Lee and Song 2006;Mondal et al 2007;Kim et al 2008;Todd 1953). Thus, groundwater and seawater together play an important role in the hydrological system of coastal aquifers (Mondal et al 2010a, b).…”

Section: Introductionmentioning

confidence: 99%

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Hydrochemical Facies and Ionic Exchange in Coastal Aquifers of Puducherry Region, India: Implications for Seawater Intrusion

Sridharan

Nathan

2017

Earth Syst Environ

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Purpose Salinization of groundwater by seawater intrusion is a major concern for the coastal aquifers worldwide. Seawater intrusion occurs mainly due to overpumping of freshwater and sea-level rise which causes lateral and vertical movements of seawater into the coastal aquifers. Methods There are several methods to identify and assess the extent of seawater ingress towards land. In the present study, a hydrochemical approach is adopted to understand the status of intrusion. -/Br -ratio is used to distinguish the causes of salinity in groundwater. The Hydrochemical Facies Evolution diagram (HFE-diagram) and heat maps generated out of it have been very well used to understand evolution of seawater intrusion and freshening process in the coastal aquifer to time. The majority of samples in pre-monsoon fall under the facies Na-HCO 3 / SO 4 , followed by Na-mixHCO 3 /mix SO 4 , Mix Na-HCO 3 / Mix SO 4 , and MixNa-MixHCO 3 /mix SO 4 facies indicating direct cations exchange process, whereas, in post-monsoon, Na-Cl, Mix Na-Cl, and Mix Ca-Cl facies are dominant indicating reverse ion exchange process. In the study area, five locations, viz. Ariyankuppam, Kariambattur, Kalapet, Mutialpet, and Parikalpet, fall under Na-Cl and Ca-Cl facies in pre-and post-monsoon which indicates consistent seawater intrusion. The hydrochemical changes that take place during seawater freshwater interaction along coastal aquifer are determined by ionic exchange. Conclusion About 24.2% of samples in pre-monsoon and 13.5% of samples in post-monsoon show mixing of seawater. The highly negative ionic exchange values of sodium during pre-monsoon indicate increased amount of seawater fraction in groundwater.

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Section: Hydrochemical Facies Evolution For Identifying Seawater Intrmentioning

confidence: 99%

Section: Hydrochemical Facies Evolution For Identifying Seawater Intrmentioning

confidence: 99%

“…6a, c d, 7a, b, d; Mondal et al 2010a). The ionic exchange values of sodium and potassium are highly negative and sulphate is highly positive (Figs.…”

Section: Hydrochemical Facies Evolution For Identifying Seawater Intrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrochemical Facies and Ionic Exchange in Coastal Aquifers of Puducherry Region, India: Implications for Seawater Intrusion

Sridharan

Nathan

2017

Earth Syst Environ

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“…Mercado 1985, Barbecot et al 2000, Harbison and Cox 2002, Al-Agha and El-Nakhal 2004, Pulido-Leboeuf 2004, Sivan et al 2005, Mondal et al 2010, Panteleit et al 2011. Cation exchange between Ca 2+ in dilute groundwater and Na + in seawater is well known (Nadler et al 1980, Richter et al 1993, Petalas and Diamantis 1999, Martínez and Bocanegra 2002, Andersen et al 2005, Appelo and Postma 2005, Petalas and Lambrakis 2006).…”

Section: Introductionmentioning

confidence: 99%

Seawater–freshwater mixing and resulting calcite dissolution: an example from a coastal alluvial aquifer in eastern South Korea

Chae

Yun

et al. 2012

Hydrological Sciences Journal

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In order to evaluate groundwater quality and geochemical reactions arising from mixing between seawater and dilute groundwater, we performed a hydrochemical investigation of alluvial groundwater in a limestone-rich coastal area of eastern South Korea. Two sites were chosen for comparison: an upstream site and a downstream site. Data of major ion chemistry and ratios of oxygen-hydrogen isotopes (δ 18 O, δD) revealed different major sources of groundwater salinity: recharge by sea-spray-affected precipitation in the upstream site, and seawater intrusion and diffusion zone fluctuation in the downstream site. The results of geochemical modelling showed that Ca 2+ enrichment in the downstream area is caused by calcite dissolution enhanced by the ionic strength increase, as a result of seawater-groundwater mixing under open system conditions with a constant P CO2 value (about 10 -1.5 atm). The results show that, for coastal alluvial groundwater residing on limestone, significant hydrochemical change (especially increased hardness) due to calcite dissolution enhanced by seawater mixing should be taken into account for better groundwater management. This process can be effectively evaluated using geochemical modelling. Résumé Afin d'évaluer la qualité des eaux souterraines et les réactions géochimiques résultant du mélange d'eau de mer et d'eaux souterraines diluées, nous avons effectué une étude hydrochimique des nappes alluviales dans une zone côtière de l'est de la Corée du Sud riche en calcaire. Deux sites de la zone d'étude (un site en amont et un site en aval) ont été choisis pour la comparaison. Les données de la chimie des ions majeurs et les rapports isotopiques de l'oxygène et de l'hydrogène (δ 18 O, δD) ont révélé différentes sources principales de salinité des eaux souterraines: le sel marin de recharge pour le site amont, l'intrusion d'eau de mer et la fluctuation de la zone de diffusion pour le site aval. Les résultats de la modélisation géochimique ont montré que Ca 2+ dans la zone d'enrichissement en aval provient de la dissolution de la calcite, renforcée par l'augmentation de la force ionique résultant du mélange de l'eau de mer et de l'eau souterraine en système ouvert avec une valeur constante de P CO2 (environ 10 -1,5 atm). Les résultats de cette étude montrent que pour les eaux souterraines côtières alluviales en zone calcaire, les modifications hydrochimiques significatives (en particulier, l'augmentation de la dureté), dues à l'augmentation de la dissolution de la calcite en raison du mélange avec l'eau de mer, doivent être soigneusement prises en considération pour une meilleure gestion des eaux souterraines. La modélisation géochimique permet d'apprécier efficacement ce processus.Mots clefs eaux souterraines littorales peu profondes; mélange avec l'eau de mer; terrain calcaire; dissolution de la calcite; modélisation hydrogéochimique

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Geogenic Pollutants in Groundwater and Their Removal Techniques

Kushawaha

Aithani

2021

Groundwater Geochemistry

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Determining the interaction between groundwater and saline water through groundwater major ions chemistry

Cited by 276 publications

References 64 publications

Hydrochemical Facies and Ionic Exchange in Coastal Aquifers of Puducherry Region, India: Implications for Seawater Intrusion

Hydrochemical Facies and Ionic Exchange in Coastal Aquifers of Puducherry Region, India: Implications for Seawater Intrusion

Seawater–freshwater mixing and resulting calcite dissolution: an example from a coastal alluvial aquifer in eastern South Korea

Geogenic Pollutants in Groundwater and Their Removal Techniques

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