Estimation of Aquifer Parameters from Surfacial Resistivity Measurement in a Granitic Area in Tamil Nadu

Mondal, N. C.; Devi, Ande Bhuvaneswari; Raj, P. Anand; Ahmed, Shakeel; Jayakumar, K.

doi:10.18520/cs/v111/i3/524-534

Cited by 6 publications

(1 citation statement)

References 14 publications

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“…T values vary from 15 to 200 m 2 /day, whereas S values from 0.0000225 to 0.00095. Aquifer transmissivity is proportional to hydraulic conductivity (K), which is best defined as an exponential function of aquifer resistivity (Mondal et al 2016a). Therefore, the calculated T values were directly used to prepare transmissivity map of the study area.…”

Section: Data Collectionmentioning

confidence: 99%

Determining shallow aquifer vulnerability by the DRASTIC model and hydrochemistry in granitic terrain, southern India

Mondal

Adike²,

Singh

et al. 2017

J Earth Syst Sci

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Shallow aquifer vulnerability has been assessed using GIS-based DRASTIC model by incorporating the major geological and hydrogeological factors that affect and control the groundwater contamination in a granitic terrain. It provides a relative indication of aquifer vulnerability to the contamination. Further, it has been cross-verified with hydrochemical signatures such as total dissolved solids (TDS), Cl − , HCO − 3 , SO 2− 4 and Cl − /HCO − 3 molar ratios. The results show four zones of aquifer vulnerability (i.e., negligible, low, moderate and high) based on the variation of DRASTIC Vulnerability Index (DVI) between 39 and 132. About 57% area in the central part is found moderately and highly contaminated due to the 80 functional tannery disposals and is more prone to groundwater aquifer vulnerability. The high range values of TDS (2304-39,100 mg/l); Na + (239-6,046 mg/l) and Cl − (532-13,652 mg/l) are well correlated with the observed high vulnerable zones. The values of Cl − /HCO − 3 (molar ratios: 1.4-106.8) in the high vulnerable zone obviously indicate deterioration of the aquifer due to contamination. Further cumulative probability distributions of these parameters indicate several threshold values which are able to demarcate the diverse vulnerability zones in granitic terrain.

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Section: Data Collectionmentioning

confidence: 99%