Water Quality Index and Geospatial Based Technique for Appraisal of Groundwater Quality in Parts of Semi-Arid Regions, Andhra Pradesh, South India

IJEP 43(12): 1096-1106 : Vol. 43 Issue. 12 (December 2023)

P. Ravi Kumar1, S. Srinivasa Gowd1*, C. Krupavathi1 and B. Praveena2

1. Yogi Vemana University, Deptartment of Geology, Kadapa – 516 005, Andhra Pradesh, India
2. Yogi Vemana University, Deptartment of Earth Sciences, Kadapa – 516 005, Andhra Pradesh, India


The objective of this research is to evaluate the potability of groundwater resources in parts of semi-arid regions, Anantapur district, Andhra Pradesh, India. Groundwater samples were taken from 24 locations around research region and analyzed for pH, EC, TDS, Ca2+, Mg2+, Na+, K+, HCO3, Cl, SO42- and NO3. The water quality index and spatial evaluation of groundwater using a GIS-based interpolation method were used to analyze water quality and explain the water quality of the studied area. The weighted arithmetic water quality index technique was used to calculate water quality index (WQI) to assure overall water quality at all stations. The results were evaluated and contrasted with WHO water quality guidelines. According to the results of the research, the groundwater is mildly alkaline. According to the Gibbs plot, groundwater samples were found in the field of rock dominance. The computed WQI for groundwater ranges from 80.86-151.5 and was categorized in good – poor grades; 46% of groundwater samples were fit for drinking while the remaining 54% of groundwater samples were unfit for drinking. According to the investigations, the quality of groundwater is safe for human consumption, although limited samples of water contain contaminants that are beyond the allowable level because of human activity.


Groundwater geochemistry, Water quality index, Remote sensing and GIS, Spatial distribution maps


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