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Evaluation of aquifer potential, geoelectric and hydraulic parameters in Ezza North, southeastern Nigeria, using geoelectric sounding
Obiora, D.N.; Ibuot, J.C. & George, N.J.
Abstract
A geoelectric survey involving vertical electrical
sounding (VES) employing Schlumberger electrode
configuration was carried out with the aim of evaluating the
aquifer potential, electric and hydraulic parameters in Ezza
North. Schlumberger electrode configuration was used to
acquire data for twelve VES stations. The interpreted and
analyzed results reveal four to six geoelectric layers. The
VES curves obtained were QQH, QHK, QHA, QQQ, HAK,
KHK, HKH and QQ. From the result, the Dar Zarrouk
parameters (longitudinal conductance and transverse
resistance) were calculated. The longitudinal conductance
ranges between 0.1528 and 4.6 mhos. The transverse
resistance ranges between 662.4 and 38,808 Ωm2. The
range of hydraulic conductivity is 1.1645–38.0491 m/day,
while the range of transmissivity is 89.66–2100.3 m2/day
from the estimated values. The contour maps were drawn
using the electrical and hydraulic parameters, and the distribution
of the aquifer parameters is shown. Based on the
results, aquifer potential and protective capacity of the
study area were determined.
Keywords
Aquifer potential; Ezza North; Hydraulic conductivity; Longitudinal conductance; Transmissivity; Transverse resistance
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