Hydrochemical investigation and assessment of groundwater quality using gis in tiruppur taluk tamil nadu india

Abstract

Groundwater is a valuable resource that many countries possess. Diverse water needs in many sectors, including agricultural, industrial and residential, are growing quickly and groundwater is depleting on a daily basis, creating instable water table level and affecting the groundwater balance. The increased demand for water has led due to its over-usage. The present study has been undertaken to identify the groundwater vulnerable regions and suggest suitable remedial measures for Tiruppur Taluk. Around 58 groundwater samples were collected from the Pre-monsoon (PRM) and Post-monsoon (POM) periods of the year 2018. The Groundwater quality showed pH, TDS, K+, Mg2+, HCO3-, Cl-, SO42-, CO32-, BOD and COD were exceeding the allowable limits, both in the Pre- and Post-monsoon periods. The weighted index overlay analysis showed that 90 % and 80 % of the study area were not suitable for drinking, both in Pre- and Post-monsoon periods. The Water Quality Index (WQI) of the groundwater sample (58 nos) showed that both in the Pre- and Post-monsoon periods, no samples were presented an excellent and good water quality for the study area. The type of water that pre-dominated the study area was Cl--Ca2+ and mixed Ca2+-Mg2+-Cl- type during for both the Pre- and Post-monsoon periods of the year 2018. Based on the Hydro-Chemical facies, the predominance of mixed Ca2+-Mg2+-Cl- indicated that the major Hydro-Chemical process was due to industrial activities and weathering solubilisation. newlineThe estimated SAR values for both PRM and POM periods for the study area were ranges between 0 and 18.48; and 1.74 and 28.43, suggesting that 90% and 81% of samples during the PRM and POM periods were appropriate for Irrigation, respectively newline