title: Study of evaluation of groundwater in Gadilam basin using hydrogeochemical and isotope data.
abstract: Gadilam river basin has gained its importance due to the presence of Neyveli Lignite open cast mines and other industrial complexes. It is also due to extensive depressurization of Cuddalore aquifer, and bore wells for New Veeranam Scheme are constructed downstream of the basin. Geochemical indicators of groundwater were used to identify the chemical processes that control hydrogeochemistry. Chemical parameters of groundwater such as pH, electrical conductivity, total dissolved solids, sodium (Na(+)), potassium (K(+)), calcium (Ca(+)), magnesium (Mg(+)), bicarbonate (HCO(-)(3)), sulfate (SO(-)(4)), phosphate (PO(-)(4)), and silica (H(4)SiO(4)) were determined. Interpretation of hydrogeochemical data suggests that leaching of ions followed by weathering and anthropogenic impact controls the chemistry of the groundwater. Isotopic study reveals that recharge from meteoric source in sedimentary terrain and rock-water interaction with significant evaporation prevails in hard rock region.
authors.affiliation: School of Engineering and Science, Curtin University of Technology, Miri, Sarawak, Malaysia. geoprasanna@gmail.com
authors.forename: Mohan Viswanathan
authors.initials: MV
authors.lastname: Prasanna
authors.forename: S
authors.initials: S
authors.lastname: Chidambaram
authors.forename: A
authors.initials: A
authors.lastname: Shahul Hameed
authors.forename: K
authors.initials: K
authors.lastname: Srinivasamoorthy
mesh_terms: D004784:Environmental Monitoring / Q000379:methods*; D005618:Fresh Water / Q000737:chemistry*; D055593:Geological Phenomena; D007194:India; D007554:Isotopes / Q000032:analysis; D008670:Metals / Q000032:analysis* / Q000737:chemistry; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D007554:Isotopes; D008670:Metals; D014874:Water Pollutants, Chemical