Dynamic freshwater–saline water interaction in the coastal zone of Jeju Island, South Korea

Kim, Kue‐Young; Park, Yoon-Suk; Kim, Gee-Pyo; Park, Ki-Hwa

doi:10.1007/s10040-008-0372-4

Cited by 49 publications

(24 citation statements)

References 14 publications

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“…It takes place when saline water displaces or mixes with freshwater in aquifers (Todd 1953). This phenomenon can be attributed to a variety of conditions like gentle coastal hydraulic gradients, tidal and estuarine activity, sea level rises, low infiltration, excessive withdrawal, and local hydrogeological conditions (Sarma and Krishnaiah 1976;Sarma et al 1982;Prasad et al 1983;Longe et al 1987;Diamantis and Petalas 1989;Rajmohan et al 1997Rajmohan et al , 2000Nowroozi et al 1999; Barrett et al 2002;Saxena et al 2004;Melloul and Collin 2006;Lee and Song 2007;Sherif and Kacimov 2007;Mondal et al 2008;Kim et al 2009). However, natural hazards, such as tidal waves and tsunami engulfing the coastal regions, result in the percolation of seawater into shallow and unconfined aquifers (Todd 1953;Villholth et al 2006).…”

Section: Introductionmentioning

confidence: 95%

“…However, natural hazards, such as tidal waves and tsunami engulfing the coastal regions, result in the percolation of seawater into shallow and unconfined aquifers (Todd 1953;Villholth et al 2006). Thus, one of the most common methods for assessing seawater intrusion through an aquifer in coastal belts is a periodic analysis of groundwater chemistry (Todd 1980;Sukhija et al 1996;Saxena et al 2003;Beddows et al 2007;Sarwade et al 2007;Kim et al 2009). When seawater intrusion is a main cause of high salinity, groundwater generally exhibits high concentrations not only in total dissolved solids (TDS) but also in major cations and anions (Richter and Kreitler 1993) as well accumulation of selective trace elements (Saxena et al 2004;Mondal et al 2010b).…”

Section: Introductionmentioning

confidence: 99%

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Hydrochemical characteristic of coastal aquifer from Tuticorin, Tamil Nadu, India

Mondal

Singh

et al. 2010

Environ Monit Assess

106

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This article deals with a systematic hydrochemical study carried out in coastal aquifers, Tuticorin, Tamil Nadu, to assess groundwater quality. A total of 29 groundwater samples were collected and analyzed. Results showed that total dissolved solids (TDS), sodium (Na+), magnesium (Mg2+), chloride (Cl-), and sulfate (SO₄²⁻) significantly damaged groundwater systems. The degree of salinization due to seawater mixing in a well or a given area could be indicated by an increase in nearly all major cations and anions. Toxic elements (i.e., Pb and As) were higher than the maximum permissible limits of drinking water. Cross plot of HCO₃⁻/Cl- (molar ratios) versus TDS indicated that about 62% of the analyzed samples were saline. Factor analysis showed that groundwaters, affected by seawater intrusion/industrial activity, were separated from the clusters. An attempt was made to identify the hydrochemical processes that accompany current intrusion of seawater using ionic changes. It was estimated that the mixing rate of seawater intrusion was about 5.81% during April 2007. An index, called 'Seawater Mixing Index' (SMI), was also adopted and its value was SMI>1.18 with EC>3,000 μS/cm about 62% of the sampled waters, were saline. Further, a few trace elements (i.e., Sr, B, and Li) were used as indicators for responding to the change in fresh to saline groundwater environments in coastal aquifers.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Hydrochemical characteristic of coastal aquifer from Tuticorin, Tamil Nadu, India

Mondal

Singh

et al. 2010

Environ Monit Assess

106

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“…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%

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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“…This phenomenon can be explained by a variety of conditions such as gentle coastal hydraulic gradients, tidal and estuarine activity, sea level rises, low infiltration, excessive withdrawal and local hydrogeological conditions (Sarma et al 1982;Longe et al 1987;Rajmohan et al 2000;Barret et al 2002;Saxena et al 2004;Kacimov et al 2009). The common method for assessing seawater intrusion through an aquifer in coastal belts is the periodic analysis of groundwater (Todd 1980;Kim et al 2009;Mondal et al 2010Mondal et al , 2011Krishnakumar et al 2012). The chemistry of groundwater is an important factor that determines its use for domestic, irrigation and industrial purposes.…”

Section: Introductionmentioning

confidence: 99%

Geochemical signatures of groundwater in the coastal aquifers of Thiruvallur district, south India

Senthilkumar

Balasubramanian²,

Gowtham

et al. 2014

Appl Water Sci

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An attempt has been made to identify the chemical processes that control the hydrochemistry of groundwater in the coastal aquifers of Thiruvallur coastal village of Thiruvallur district, Tamil Nadu, south India. The parameters such as pH, EC, TDS and major ion concentrations of Na, K, Ca, Mg, Cl, HCO 3 , SO 4 and NO 3 of the groundwater were analyzed. Abundances of these ions are in the following order Na [Ca[Mg [K and HCO 3 [ Cl[SO 4 [NO 3 . The dominant water types are in the order of NaCl[ mixed CaMgCl [ CaHCO 3 [ CaNaHCO 3 . Water types (mixed CaHCO 3, mixed CaMgCl and NaCl) suggest that the mixing of high salinity water caused from surface contamination sources such as irrigation return flow, domestic wastewater and septic tank effluents with existing water followed by ion exchange reaction processes, silicate weathering and evaporation are responsible for the groundwater chemistry of the study area. The above statement is further supported by Gibbs plot where most of the samples fall within the evaporation zone.

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Dynamic freshwater–saline water interaction in the coastal zone of Jeju Island, South Korea

Cited by 49 publications

References 14 publications

Hydrochemical characteristic of coastal aquifer from Tuticorin, Tamil Nadu, India

Hydrochemical characteristic of coastal aquifer from Tuticorin, Tamil Nadu, India

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

Geochemical signatures of groundwater in the coastal aquifers of Thiruvallur district, south India

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