Abstract
Groundwater in Palnad sub-basin is alkaline in nature and Na+-Cl−-HCO −3 type around Macherla-Karempudi area in Guntur district, Andhra Pradesh. Total dissolved solids (TDS) show strong positive correlation with Cl−, Na+, Ca2+ and Mg2+, and positive correlation with SO 2−4 , K+ and HCO −3 . Calcareous Narji Formation is the dominant aquifer lithology, and water-rock interaction controls the groundwater chemistry of the area. Chloro-alkaline indices (CAI) are positive at Miriyala, Adigopula, Mutukuru, Macherla and Durgi suggesting replacement of Na+ and K+ ions from water by Mg++ and Ca++ ions from country rock through base exchange reactions. Negative CAI values are recorded at Terala, Rayavaram and Nehrunagar, which indicate exchange of Na+ and K+ from the rock as cation-anion exchange reaction (chloro-alkaline disequilibrium).
TDS range from 91 to 7100 ppm (Avg. 835 ppm) and exceed the prescribed limit of drinking water around Mutukuru, Durgi, Rayavaram, Khambampadu and Ammanizamalmadaka areas. Scanty rainfall and insufficient groundwater recharge are the prime factors responsible for high salinity in the area. Fluoride content ranges from <1 to 3.8 ppm and contaminated areas were identified around Macherla (1 sq km; 3.8ppm), Mandadi (1 sq km, 2.1ppm) and Adigopula (2 sq km, <1 to 3.7 ppm). The % Na+ content varies from 17 to 85 with the mean value of 57, and eighty (80) samples showed higher %Na+ in comparison to the prescribed limit of 60 for irrigation water. Sodium Adsorption Ratio (SAR) and % Na+ in relation to total salt concentration indicate that groundwater (51%) mostly falls under doubtful to poor quality for irrigation purpose. Groundwater of Adigopula village is fluoride contaminated and remedial measures are suggested to improve the water quality.
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References
BIS (1991) Drinking Water Specifications. Bureau of Indian Standards, IS 10500.
Gibbs, R.J. (1970) Mechanism Controlling World’s Water Chemistry. Science, v.170, pp 1088–1090.
Handa, B.K. (1975) Geochemistry and Genesis of fluoride contain ground water in India. Ground Water, v.13, pp.275–281.
Lloyd, J.W. and Heathcote, J.A. (1985) Natural inorganic hydrochemistry in relation to groundwater, Clarendon Press-Oxford, U.K.
Nagaraja Rao. B.K., Rajurkar, S.T., Ramalingaswamy, G. and Ravindrababu, B. (1987) Stratigraphy, structure and evolution of the Cuddapah Basin. Jour. Geol. Soc. India, v.7, pp.33–50.
Piper, A.M. (1944) A graphical procedure in the chemical interpretation of groundwater analysis. Trans. Amer. Geophy. Union, v.25, pp.914–923.
Richard, L.A. (1954) Diagnosis and improvement of saline and alkali soils. U.S. Department of agriculture handbook, 60p.
Schoeller, H. (1977) Geochemistry of groundwater. In: Groundwater studies-An International Guide for Research and Practice. UNESCO, Paris, Ch.15, pp.1–18.
Sinha, R.M. (2004) Application of hydrogeochemical survey in search for concealed uranium mineralisation — Some Indian examples. Jour. Appld. Geochem., v.6(2), pp.133–146.
Subba Rao, N. and John Devadas, D. (2005) Quality criteria for groundwater use for development of an area, Jour. of Appl. Geochem., v.7(1), pp 9–23.
WHO (1984) Guidelines for drinking water quality in Health Criteria and other suppoting Information, v.2, 336p.
Wilcox, L.V. (1955). Classification and use of irrigation waters. U.S. Department of Agriculture Circular 969, Washington, D.C., USA.
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Gupta, S., Dandele, P.S., Verma, M.B. et al. Geochemical assessment of groundwater around Macherla-Karempudi area, Guntur district, Andhra Pradesh. J Geol Soc India 73, 202–212 (2009). https://doi.org/10.1007/s12594-009-0076-y
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DOI: https://doi.org/10.1007/s12594-009-0076-y