Hydrochemical characteristics of coastal aquifers of Kadaladi, Ramanathapuram District, Tamilnadu, India
2013; Springer Nature; Volume: 3; Issue: 3 Linguagem: Inglês
10.1007/s13201-013-0108-z
ISSN2190-5487
AutoresP. Sivasubramanian, N. Balasubramanian, John Prince Soundranayagam, N. Chandrasekar,
Tópico(s)Geochemistry and Geologic Mapping
ResumoGeochemical signatures of groundwater in the coastal aquifers of Kadaladi block of Ramanathapuram District, Tamilnadu, India were used to identify the chemical processes that control hydrochemistry. The parameters such as pH, EC, TDS and major ion concentrations Na, K, Ca, Mg, Cl, HCO3, SO4, PO4 and NO3 of the groundwater were analyzed. Abundances of these ions are in the following order Na > Ca > Mg > K and Cl > HCO3 > SO4 > NO3 > PO4. Na–Cl is the dominant hydrochemical facies of the study area. Interpretation of the hydrochemical data suggests that hydrochemistry of the study area is controlled by mixing of fresh water with relict saline water, ion-exchange processes, silicate weathering and evaporation are responsible for the groundwater chemistry of the study area. Above statement is further supported by Gibbs plot where most of the samples fall within the evaporation zone. Good quality groundwater is restricted to coastal sand dunes running parallel to the coast and it is important to conserve these dunes.
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