International scientific journal

ISSN: 2663-0419 (electronic version)

ISSN: 2218-8754 (print version)

International scientific journal

ISSN: 2663-0419 (electronic version)

ISSN: 2218-8754 (print version)


Hydro-geophysical parameters estimation of porous aquifer using geoelectrical technique-case study from Baiji–Tikrit Sub-Basin, Iraq

Abdulrazzaq Z.T.1, Ahmed M.M.2, Salih S.A.2, Asfahani J.3

1 - Directorate of Space and Communications, Ministry of Science and Technology,
Baghdad, Iraq, 10070:

2 - Department of Applied Geology, College of Science, University of Tikrit, Tikrit, Iraq, 34001: (M.M.A), (S.A.S)

3 - Geology Department, Atomic Energy Commission, Damascus, Syria, P.O. Box 6091:


A geoelectrical survey is carried out in Baiji–Tikrit Sub-basin, Iraq, by applying the vertical electrical sounding (VES) technique to determine the thickness, extension, and hydraulic parameters of the main aquifers. A total of 40 VESs distributed along six geoelectrical profiles were executed using liner Schlumberger configuration, with a maximum half spacing of 400 m (AB/2 = 400 m), where a penetration depth of 151 m was reached. The VESs curves are processed and interpreted manually by the auxiliary point method and automatically by IPI2win software using the manual inverse modeling to reduce the root mean square error ratio and increase the accuracy of the interpretation. The inversion results showed that the thickness of the main aquifer is about 50-128 m. The results of interpretation were used to draw a six geoelectrical sections along the survey traverses. Likewise, the results showed that the main aquifer of the area consists of sediments (sand, clay sand and clay) which belong to the Injana formation, whose conditions are apt to change in the area, from the confined type to the semi confined. Specific empirical relations have been established between the geoelectrical and hydraulic parameters. They are used to calculate the hydraulic conductivity (K) and the transmissivity (T) of the mean aquifer in the study area. The resulting K and T values are used to follow their spatial variations to delineate the suitable areas for new locations of wells.

Keywords: VES, manual inverse modeling, hydro-geological characters, transmissivity, Baiji–Tikrit sub-basin, Iraq


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DOI: 10.33677/ggianas20220100068