Hydrogeochemical Studies of Chennur Mandal, Kadapa District, Andhra Pradesh, India using Geospatial Techniques

Abstract

Hydro-chemical investigation was undertaken in the Chennur mandal to ascertain the groundwater quality and its suitability for drinking and irrigation purposes. In this context, twenty seven (27) representative groundwater samples were collected from different dug/bore wells based on their importance in drinking and analysed. Physicochemical parameters like pH, EC and TDS; cations viz., Ca, Mg, Na and K; and anions include CO3, HCO3, SO₄, NO³, F, Cl were determined to authenticate the groundwater suitability for drinking.  The pH of ground water in the study area is ranging from 7.7 to 8.8 The total hardness of the groundwater in the study area is ranging from 12 to 78 mg/l. Water hardness is primarily due to the result of interaction between water and the Geological formation. The calcium concentration of groundwater in the study area is ranging from 8 to 36 mg/l during the pre-monsoon period. The chloride concentration of the ground water in the study area ranging from 16.9 to 232.2 mg/l during pre-monsoon period. The bicarbonate concentration of the groundwater in the study area in ranging from 48.8 to 280.6 mg/l during the pre-monsoon period. The fluoride concentration of the groundwater in the study area ranging from 0.78 to 2.62 mg/l during the pre-monsoon period. Low concentration of fluoride (0.78 mg/l) is observed in Nazeerbegpalle village and high concentration of fluoride (2.62 mg/l) is observed Ramanapalle village. Proper deflouridation techniques have to follow to monitor fluoride contamination.