Estimation of hard rock aquifers hydraulic conductivity from geoelectrical measurements: A theoretical development with field application

Based on the analogy between Darcy’s law for groundwater flow and Ohm’s law for electric current flow, a methodology has been developed to estimate the hydraulic conductivity and transmissivity of hard rock granite aquifer from geoelectrical parameters. The common parameter, aquifer thickness ( t),...

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Bibliographic Details
Published in:Journal of hydrology (Amsterdam) 2008-08, Vol.357 (3), p.218-227
Main Authors: Chandra, Subash, Ahmed, Shakeel, Ram, Avadh, Dewandel, Benoit
Format: Article
Language:English
Subjects:
aquifer thickness
aquifers
Earth sciences
Earth, ocean, space
electrical resistance
Environmental Sciences
estimation
Exact sciences and technology
geoelectric parameters
Geoelectrical parameters
Geophysics: general, magnetic, electric and thermic methods and properties
granite
Hard rock
Hydraulic conductivity
Hydrogeology
hydrologic models
Hydrology. Hydrogeology
Internal geophysics
Longitudinal conductance
rocks
saturated hydraulic conductivity
Transmissivity
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Summary:Based on the analogy between Darcy’s law for groundwater flow and Ohm’s law for electric current flow, a methodology has been developed to estimate the hydraulic conductivity and transmissivity of hard rock granite aquifer from geoelectrical parameters. The common parameter, aquifer thickness ( t), has been used to combine the two relations and form an analytical equation. Mathematical relation shows a negative correlation between hydraulic conductivity and aquifer resistivity, and a positive correlation between transmissivity and longitudinal conductance. The methodology has been calibrated and validated in hard rock granite aquifers in India. The good agreement between aquifer hydraulic conductivity ( K) and transmissivity ( T) obtained from the resistivity sounding parameters and those obtained from pumping test analysis proves the potentiality of the methodology. It has been applied to estimate the K and T from the surface electrical resistivity parameters and results were utilized to prepare the K and T maps of Maheshwaram watershed in hard rock terrain in India.
ISSN:0022-1694
1879-2707
DOI:10.1016/j.jhydrol.2008.05.023