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Geochemical characteristics and quality of groundwater evaluation for drinking, irrigation, and industrial purposes from a part of hard rock aquifer of South India

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Abstract

The present study is a part of hard rock aquifer of Telangana, South India, where the groundwater is withdrawn heavily for drinking, irrigation, and small-scale industrial purposes. Geochemical characteristics explain the chemical processes, which control the groundwater chemistry and consequently the groundwater quality, while the chemical quality of groundwater is adversely affected by anthropogenic activities, which damage the water environment. The focus of the present study was, thus, to know the origin of geochemical characteristics and also to evaluate the quality of groundwater for various purposes for taking the suitable remedial measures to provide safe water to the local community. Geochemical relations (GR) and hierarchical cluster analysis (HCA) were used to assess the geochemical characteristics. Entropy weighted groundwater quality index (EWGQI), United States Soil Salinity Laboratory Staff (USSLS)’s diagram, and groundwater quality criteria for water supply pipes (GQCW) were used to evaluate the groundwater quality for drinking, irrigation, and industrial purposes, respectively. The study found that the water-rock interactions associated with ion exchange and evaporation were the prime geochemical factors controlling the geochemical characteristics and the anthropogenic activities as the secondary factor. These observations were further supported by HCA. According to the EWGQI, 34.97% of the spatial area was found to have the poor and very poor groundwater quality zones for drinking purpose, because of the dominance of TDS, Na+, Cl, \( {\mathrm{SO}}_4^{2-} \), \( {\mathrm{NO}}_3^{-} \), and F contents in the groundwater system. Based on the USSLS’s diagram, 79.55% of the present study area was observed to be poor and very poor water quality type for irrigation utilization due to salinity hazard. The GQCW demonstrated that the 7.91% and 8.82% of the areas were not suitable for industrial purpose due to influence of incrustation based on \( {\mathrm{HCO}}_3^{-} \) and \( {\mathrm{SO}}_4^{2-} \), respectively, and 1.85%, 12.32%, and 1.25 of the areas are unfit due to influence of corrosion based on pH, TDS, and Cl, respectively. Therefore, boiling, activated carbon filter, rainwater harvesting, suitable coatings on metal surfaces of water supply pipes, etc. are the important suggested effective strategic measures to provide safe water for drinking, irrigation, and industrial purposes.

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Acknowledgments

Authors are thankful to the Director, Central Ground Water Board, Southern Region, Hyderabad, India, for providing facilities to carry out the chemical analysis. The authors are also grateful to the editor and the anonymous reviewers, who helped us in improving the quality of the present paper.

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Nandipati Subba Rao: field work and writing of the paper

Aduri Dinakar: field work and writing of the paper

Maradana Sravanthi: typing, literature collection, and field work

Bokka Karuna Kumari: typing, calculations, and preparation of maps using GIS

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Correspondence to N. Subba Rao.

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Responsible Editor: Xianliang Yi

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Rao, N.S., Dinakar, A., Sravanthi, M. et al. Geochemical characteristics and quality of groundwater evaluation for drinking, irrigation, and industrial purposes from a part of hard rock aquifer of South India. Environ Sci Pollut Res 28, 31941–31961 (2021). https://doi.org/10.1007/s11356-021-12404-z

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  • DOI: https://doi.org/10.1007/s11356-021-12404-z

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