Application of water quality index for groundwater quality assessment: Thirumanimuttar sub-basin, Tamilnadu, India.

Abstract

An attempt has been made to understand the hydrogeochemical parameters to develop water quality index in Thirumanimuttar sub-basin. A total of 148 groundwater samples were collected and analyzed for major cations and anions. The domination of cations and anions was in the order of Na>Mg>Ca>K for cations and Cl>HCO(3) >SO(4) in anions. The hydrogeochemical facies indicate alkalis (Na and K) exceed alkaline earths (Ca and Mg) and strong acids (Cl and SO(4)) exceed weak acid (HCO(3)). Water quality index rating was calculated to quantify overall water quality for human consumption. The PRM samples exhibit poor quality in greater percentage when compared with POM due to effective leaching of ions, over exploitation of groundwater, direct discharge of effluents and agricultural impact. The overlay of WQI with chloride and EC correspond to the same locations indicating the poor quality of groundwater in the study area. SAR, Na%, and TH were noted higher during both the seasons indicating most of the groundwater locations not suitable for irrigation purposes.

• Authors: M Vasanthavigar, K Srinivasamoorthy, K Vijayaragavan, R Rajiv Ganthi, S Chidambaram, P Anandhan, R Manivannan, S Vasudevan
• Journal: Environmental monitoring and assessment (Environ Monit Assess) Vol. 171 Issue 1-4 Pg. 595-609 (Dec 2010) ISSN: 1573-2959 [Electronic] Netherlands
• PMID: 20091344 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Water Pollutants, Chemical

Topics

• Environmental Monitoring (methods)
• Fresh Water (chemistry)
• Humans
• India
• Water Pollutants, Chemical (analysis)
• Water Supply (analysis)