Association of hydrogeological factors in temporal variations of fluoride concentration in a crystalline aquifer in India


The major part of groundwater in India is found in granitic aquifers. Fluoride in groundwater from a crystalline aquifer in a semi-arid region of granitic rocks in India, known as Maheshwaram watershed, was analyzed for spatial and temporal variability during 1999–2002 to assess the effect of hydrogeological factors on fluoride concentration. Samples were collected from 32 representative wells in the area for the pre- and post-monsoon seasons and analyzed for F content. The CHESS computer program was used to calculate ionic activities of aqueous species and the mineral saturation index (SI) for calcite and fluorite. The GARDENIA computer program was used to calculate the recharge values in the study area. The influences of dissolution kinetics of fluoride minerals and recharge from rainfall on fluoride concentration were of interest and results clearly indicate that fluoride content in groundwater depends on the interaction period of groundwater with host rock. Results could also be utilized for designing remedial measures particularly with dilution method in an optimal way.

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The authors wish to thank the Director, NGRI, for permission to publish the paper. The research work has been carried out under projects financed by the IFCPAR, New Delhi, and CSIR, New Delhi.

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Sreedevi, P.D., Ahmed, S., Made, B. et al. Association of hydrogeological factors in temporal variations of fluoride concentration in a crystalline aquifer in India. Environ Geol 50, 1–11 (2006).

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  • Groundwater
  • Fluoride
  • Rainfall
  • Water–rock interaction
  • Granitic aquifer
  • India