Application of 2D and 3D geoelectrical resistivity imaging for engineering site investigation in a crystalline basement terrain, southwestern Nigeria

Orthogonal set of 2D geoelectrical resistivity field data, consisting of six parallel and five perpendicular profiles, were collected in an investigation site using the conventional Wenner array. Seven Schlumberger soundings were also conducted on the site to provide ID layering information and supp...

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Bibliographic Details
Published in:Environmental earth sciences Vol. 61; no. 7; pp. 1481 - 1492
Main Authors: Aizebeokhai, Ahzegbobor Philips, Olayinka, A. I., Singh, V. S.
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer-Verlag 01.10.2010
Springer
Springer Nature B.V
Subjects:
Biogeosciences
Crystallization
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Environmental Science and Engineering
Exact sciences and technology
Field study
Geochemistry
Geoengineering
Geology
Geophysics: general, magnetic, electric and thermic methods and properties
Groundwater potential
Hydrogeology
Hydrology. Hydrogeology
Hydrology/Water Resources
Internal geophysics
Original Article
Terrestrial Pollution
Nigeria
West Africa
Africa
Engineering investigations
Geoelectrical
Orthogonal profiles
Resistivity
Imaging
2D and 3D inversion
basement
inverse problem
data processing
ground water
apparent resistivity
sounding
fracturing
depth
aquifers
imagery
three-dimensional models
two-dimensional models
electrical resistivity
distortion
ISSN:1866-6280, 1866-6299
Online Access:Get full text
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Summary:Orthogonal set of 2D geoelectrical resistivity field data, consisting of six parallel and five perpendicular profiles, were collected in an investigation site using the conventional Wenner array. Seven Schlumberger soundings were also conducted on the site to provide ID layering information and supplement the orthogonal 2D profiles. The observed 2D apparent resistivity data were first processed individually and then collated into 3D data set which was processed using a 3D inversion code. The 3D model resistivity images obtained from the inversion are presented as horizontal depth slices. Some distortions observed in the 2D images from the inversion of the 2D profiles are not observed in the 2D images extracted from the 3D inversion. The survey was conducted with the aim of investigating the degree of weathering and fracturing in the weathered profile, and thereby ascertaining the suitability of the site for engineering constructions as well as determining its groundwater potential.
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ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-010-0464-z