An attempt has been made to work out the groundwater quality assessment for agriculture representing from a total area of about 340.46 km2 in upper Thirumanimuthar sub-basin, Cauvery River. The 51 groundwater samples were collected from variation location of the study area during pre-monsoon (May) 2014 and were analysed for major cations and anions, EC, Kelley’s ratio, SAR values, Mg-Hazards, HCO3 and RSC calculated. The study has shown that salinity of groundwater under “increasing problem” zone at majority of sites. The data were interpreted using Wilcox and USSL Classifications. The groundwater samples fall under good to permissible (Wilcox Diagram) zone. The SAR values were plotted in the USSL staff diagram and found most of the groundwater samples belongs to C3-S1 (58.82%). These results were taken into GIS platform, to prepare the spatial distribution maps. Finally GIS output maps result reveals that 181.5 Km2 areas fall in (Wilcox) Good to Permissible category and 213.68 Km2 area falls in (USSL) C3-S1 category. Above said areas indicate that the groundwater could be used for all types of crops.
Impact Factor
2022: 6.012
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