A study on the hydrogeology and hydrogeochemistry of groundwater from different depths in a coastal aquifer: Annamalai Nagar, Tamilnadu, India

Chidambaram, S.; Kumar, Gopal; Prasanna, Mohan Viswanathan; Peter, A. John; Ramanathan, Alagappan; Srinivasamoorthy, K.

doi:10.1007/s00254-008-1282-4

Cited by 70 publications

(28 citation statements)

References 9 publications

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“…A positive relationship is found between pH and U in FHBG, while it is negative in all other lithologies, which accords with the observation reported by Ioannidou et al (2011). It is interesting to note that the HCO 3 concentrations are also lower in the FHBG, which may be due to frequent flushing (Prasanna et al 2008) or due to a lesser release of HCO 3 during the process of weathering (Chidambaram et al 2009). Another possible cause would be conversion of bicarbonate to carbonate and subsequent formation of UO 2 CO 3 0 species, which is supported by the presence of the higher average concentrations of UO 2 CO 3 0 species in this formation as compared to other formations.…”

Section: Effect Of Uranium With Ph Ec and Temperaturesupporting

confidence: 86%

Lithological and hydrochemical controls on distribution and speciation of uranium in groundwaters of hard-rock granitic aquifers of Madurai District, Tamil Nadu (India)

Thivya

Chidambaram

Keesari

et al. 2015

Environ Geochem Health

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Uranium is a radioactive element normally present in hexavalent form as U(VI) in solution and elevated levels in drinking water cause health hazards. Representative groundwater samples were collected from different litho-units in this region and were analyzed for total U and major and minor ions. Results indicate that the highest U concentration (113 µg l(-1)) was found in granitic terrains of this region and about 10 % of the samples exceed the permissible limit for drinking water. Among different species of U in aqueous media, carbonate complexes [UO2(CO3)(2)(2-)] are found to be dominant. Groundwater with higher U has higher pCO2 values, indicating weathering by bicarbonate ions resulting in preferential mobilization of U in groundwater. The major minerals uraninite and coffinite were found to be supersaturated and are likely to control the distribution of U in the study area. Nature of U in groundwater, the effects of lithology on hydrochemistry and factors controlling its distribution in hard rock aquifers of Madurai district are highlighted in this paper.

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Section: Effect Of Uranium With Ph Ec and Temperaturesupporting

confidence: 86%

Lithological and hydrochemical controls on distribution and speciation of uranium in groundwaters of hard-rock granitic aquifers of Madurai District, Tamil Nadu (India)

Thivya

Chidambaram

Keesari

et al. 2015

Environ Geochem Health

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“…This type of water causes salinity problems, and the factor of dilution reduces the salinity to some extent. Increased chloride concentration in the postmonsoon season may be due to the process of the removal of other ions from the system, either by precipitation or by adsorption (Chidambaram et al 2008). In the study area, the major groundwater type is a mixed category (no one cation-anion pair exceeds 50%) during the pre-monsoon in 74% and the postmonsoon in 68%.…”

Section: Groundwater Chemistrymentioning

confidence: 98%

A hydrochemical and geological investigation on the Mambakkam mini watershed, Kancheepuram District, Tamil Nadu

Shanmugam

Ambujam

2011

Environ Monit Assess

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The hydrochemical characterization of groundwater is important to bring out its nature and usefulness. The main objective of this paper was to discuss the major ion chemistry of groundwater in the Mambakkam mini watershed. Besides its semi-arid nature, rapid socioeconomic development encourages a greater demand for water, which leads to uncontrolled groundwater development. The groundwater of the study area is characterized by the dominance of alkaline earth (Ca(2+), Mg(2+)) and strong acids (Cl(-), SO(4)(-)) over alkalies (Na(+), K(+)) and weak acids (HCO(3)(-), CO(3)(-)) during both post-monsoon and pre-monsoon seasons of the year 2010, based on the hydrochemical facies. These have been probably derived from natural chemical weathering of rock minerals, ion exchange and anthropogenic activities of the fertilizer source. The classification based on the total hardness reveals that a majority of groundwater samples fall in the hard to very hard category during the pre-monsoon season. Based on the values of EC, SAR and RSC and the diagrams of USSL and Wilcox, most of the groundwater samples range from excellent to permissible for irrigation purposes, with a low alkalinity and high salinity hazard, except for a few samples in the study area.

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“…The hydrochemical analysis of groundwater for various locations provides spatial distribution of chemical composition and its ionic concentration (Ozler 2002;Sivakumar and Elango 2008). Hydrochemical properties of the area act as primary factors for cross-verification of DRASTIC output, and it is an indicator of groundwater quality changes due to diffusion of contaminants into the aquifer and saltwater intrusion (Chidambaram et al 2009;Mondal et al 2011;Sivasubramanian et al 2013). The total dissolved solids (TDS) and chloride (Cl − ) contents in the groundwater can be used for monitoring the overall water quality along the coastal belt (Cimino et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Mapping of coastal aquifer vulnerable zone in the south west coast of Kanyakumari, South India, using GIS-based DRASTIC model

Kaliraj

Chandrasekar

Peter

et al. 2014

Environ Monit Assess

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The south west coast of Kanyakumari district in Tamil Nadu, India, is significantly affected by seawater intrusion and diffusion of pollutants into the aquifers due to unregulated beach placer mining and other anthropogenic activities. The present study investigates the vulnerability of the coastal aquifers using Geographic Information System (GIS)-based DRASTIC model. The seven DRASTIC parameters have been analyzed using the statistical equation of this model to demarcate the vulnerable zones for aquifer contamination. The vulnerability index map is prepared from the weighted spatial parameters, and an accounting of total index value ranged from 85 to 213. Based on the categorization of vulnerability classes, the high vulnerable zones are found near the beach placer mining areas between Manavalakurichi and Kodimanal coastal stretches. The aquifers associated with settlements and agricultural lands in the middle-eastern part have experienced high vulnerability due to contaminated water bodies. Similarly, the coastal areas of Thengapattinam and Manakudi estuary and around the South Tamaraikulam have also been falling under high vulnerability condition due to backwater and saltpan. In general, the nearshore region except the placer mining zone and the backwater has a moderately vulnerable condition, and the vulnerability index values range from 149 to180. Significantly, the northern and northeastern uplands and some parts of deposition zones in the middle-south coast have been identified as low to no vulnerable conditions. They are structurally controlled by various geological features such as charnockite, garnet biotite gneiss and granites, and sand dunes, respectively. The aquifer vulnerability assessment has been cross-verified by geochemical indicators such as total dissolved solids (TDS), Cl(-), HCO₃(-), and Cl(-)/HCO₃(-) ratio. The high ranges of TDS (1,842--3,736 mg/l) and Cl(-) (1,412--2,112 mg/l) values are well correlated with the observed high vulnerable zones in the study area. The Cl(-)/HCO₃(-) ratio (7.13 to 12.18) of the high vulnerable zone obviously indicates deterioration of the aquifer contamination. Sensitivity analysis has also been performed to evaluate sensitivity of the individual DRASTIC parameters to aquifer vulnerability. This reveals the net recharge rate and groundwater table depth are becoming more sensitive to aquifer contamination. It is realized that the GIS is an effective platform for aquifer vulnerability mapping with reliable accuracy, and hence, the study is more useful for sustainable water resource management and the aquifer conservation.

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A study on the hydrogeology and hydrogeochemistry of groundwater from different depths in a coastal aquifer: Annamalai Nagar, Tamilnadu, India

Cited by 70 publications

References 9 publications

Lithological and hydrochemical controls on distribution and speciation of uranium in groundwaters of hard-rock granitic aquifers of Madurai District, Tamil Nadu (India)

Lithological and hydrochemical controls on distribution and speciation of uranium in groundwaters of hard-rock granitic aquifers of Madurai District, Tamil Nadu (India)

A hydrochemical and geological investigation on the Mambakkam mini watershed, Kancheepuram District, Tamil Nadu

Mapping of coastal aquifer vulnerable zone in the south west coast of Kanyakumari, South India, using GIS-based DRASTIC model

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