Seasonal Variations of Physiochemical Characteristics of Groundwater Quality from Nambiyar River Basin, Tirunelveli District, Tamil Nadu, India

The present study was carried out to analyse and evaluate the groundwater quality for two different seasons in Nambiyar river basin of Tirunelveli district, Tamil Nadu, India. The parameters studied were pH, Electrical Conductivity, Total Dissolved Solids, Total Hardness, Calcium, Magnesium, Chloride, Sodium, Potassium, Nitrate, Fluoride, Sulphate and Bicarbonate. Correlation coefficient studies have been carried among all possible pairs of 13 physiochemical parameters. Correlation coefficients were determined to identify the highly correlated and interrelated water quality parameters. Regression equations were formulated for highly correlated water quality parameters. Piper and Multi-rectangular diagram have been used to identify the water type of the study area. The water type in the study area was found to be mixed Ca²⁺-Mg²⁺-Cl^- in both monsoon and summer seasons. However, in summer season some samples have shown mixed Na⁺-HCO₃^- type.