Assessment of Groundwater Quality Using GIS - A Case Study of the Churu District of Rajasthan Case Study Description of the Study Area
2015
Singh, A. N. (BITS-Pilani, Rajasthan (India). Department of Civil Engineering) | Anuradha, D. (BITS-Pilani, Rajasthan (India). Department of Civil Engineering) | Mohanty, Satish (BITS-Pilani, Rajasthan (India). Department of EEE)
Assessment of Groundwater quality using the Water Quality Index (WQI) and the Geographic Information System (GIS) was carried out in the Churu district of Rajasthan. The results of 8 physico-chemical parameters were used for the calculation of the WQI. The results indicated that the WQI values range from 0 to 789 and thus indicates very poor groundwater quality status in the region in one case. The results of 8 physico-chemical parameters were used in the second case resulting in a WQI range from 0 to 3,279. The geographical information system using the Inverse Distance Weighted method (IDW) delineated three groundwater quality zones into good to very poor. The hierarchal cluster analysis identified anthropogenic contamination and natural mineralization as the major processes controlling groundwater chemistry. From the correlation matrix, it could be said that Turbidity, Fluorides as F- and TDS are responsible for high WQI values in the region. The trend of WQI is very similar in both cases used to determine WQI. In arid regions the WQI should be high.
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