Abstract
Rameswaram-Dhanushkodi coastal tract lies in the south-east of Rameswaram Island, which stretches about 20 km from the Rameswaram proper and occults several historic values. The objective of the present study is to investigate the water quality parameters viz., pH, electrical conductivity (EC), total dissolved solids (TDS), salinity (SAL), total alkalinity (TA), calcium hardness (CH), magnesium hardness (MH), total hardness (TH), chloride (Cl), and fluoride (F) during summer and winter seasons of the year 2006. The calculated Langelier Saturation Index values confirm the incrusting ability in most of the groundwater samples. The Water Quality Index values show that the potable quality of groundwater is improved from about 32% to 58%, especially in post-winter. The principal component analysis identifies the dominance of CH, TA, and TH with 33% and 44% in summer and winter, respectively. In addition, Cl is also having dominance in winter. The box plots have depicted asympathy in concentrations of F, TDS, and CH during winter, whereas sympathetic relationship in Cl and MH. Unlike in summer, a good correlation of Cl with the other parameters including SAL, EC, TDS, CH, and TH is observed in the winter.
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