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Environmental Research Journal
Year: 2012  |  Volume: 6  |  Issue: 3  |  Page No.: 197 - 205

Assessment of Irrigation Potential of Groundwater using Water Quality Index Tool

K. Adhikari, B. Chakraborty and A. Gangopadhyay    

Abstract: Transforming parametric concentrations into qualitative scores irrespective of unit has made the WQI a comprehensive and easy to use tool to the decision makers. As criteria of water quality vary with purpose of use of the groundwater, selection of water quality parameters, involved in working out quality index for specific use also differs. Use of Groundwater Quality Index (GWQI) technique to assess irrigation water quality is innovative in this study. Electrical Conductivity (EC), Sodium Adsorption Ratio (SAR) and Residual Sodium Carbonate (RSC), judged as the three most important parameters to designate irrigation quality of groundwater have been used to work out GWQI in this study. Preparation of ISO Index maps using water quality scores, derived through GWQI tool, vividly portray the irrigation water quality status of the study area where most of the area fall under excellent and good categories. The marked difference in water quality with respect to season in some areas of Southeastern and Southwestern parts of the study area may be correlatable to the recharge and discharge zones of groundwater, respectively.

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