Spatial distribution of Groundwater quality assessment using Water Quality Index and GIS techniques in Thanjavur Taluk, Thanjavur District, Tamil Nadu, India

Assessment of groundwater quality is utmost importance to ensure sustainable use water. Since the availability water, irrespective quantity and quality, varies from area in Thanjavur taluk. The present paper attempts determine spatial distribution parameters identify locations with best for drinking irrigation study using GIS WQI. Using IDW interpolation methods ArcGIS 10.8, maps physical parameters, anions, cations, WQI, irrigations indices have been generated. Piper pilot shows that Ca-Mg-Cl (mixed), Na-Cl, Ca-Cl, Ca–Mg–HCO3 water types are found area. a index rating scale, 42.85%, 28.57%, 14.3% samples fit, good, very poor purposes, respectively. obtained results higher SAR, RSC, Na% show 75% perfectly fit purposes due long residence time dissolution minerals lithological composition, addition chemical fertilizers. analysis used suggest models assessing quality. ascertained area's must be treated prior consumption protected perils contamination.