Seasonal Variation of Groundwater Quality status of Thiruvarur Taluk, Tamil Nadu, India

Abstract

This study aimed to assess groundwater quality in the Thiruvarur Taluk of southern India, which has intensive agricultural activities. The variation in groundwater quality was identified by analyzing chemical components such as pH, EC, TDS, major cations, and anions. This region was sampled during pre-monsoon (PRM) and post-monsoon (POM) seasons, with 40 groundwater samples collected from the bore and dug wells in 2018. Hill-Piper plot, 57.5 % (POM) and 50 % (PRM) of the study area are Sodium Chloride. Effluent from untreated industries pollutes it. There is no contamination of any kind in the remaining groundwater samples. Mixed type (No Cation-Anion exceeds 50%) affected 37.5% (POM) and 42.5 % (PRM) of the samples, and the Magnesium bicarbonate type affected 5% (POM) and 7.5 % (PRM). Most samples are plotted in the rock dominance plot from Gibb's boomerang. Rock water interaction dominated most of the portion since no surface water bodies were observed in this area. In groundwater quality maps produced by inverse distance weighting of ArcGIS, according to the World Health Organization.