Eissa, RM, Cassidy, NJ, Pringle, JK ORCID: https://orcid.org/0000-0002-0009-361X and Stimpson, IG (2019) Electrical resistivity tomography array comparisons to detect cleared-wall foundations in brownfield sites. Quarterly Journal of Engineering Geology and Hydrogeology. (In Press)

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Abstract

Electrical resistivity surveys are commonly used to detect and characterise near-surface buried objects in commercial developments of brownfield sites. 2D ERT profiles arrays predominate in such surveys due to their relatively rapid deployment, good penetration depths and fast data collection rates. However, there is a need to test the optimum array types in such surveys. A scaled-model was used to simulate a large cleared-building wall foundation at a test facility, before multiple 2D ERT profiles were acquired using different array configurations. Results were used to generate 2D resistivity models using both least-square smoothness-constraint and robust inversion. 2D profile array comparisons showed that the Wenner and dipole-dipole arrays were the best in detecting the cleared-wall foundation, although dipole-dipole arrays better delineated the top of the wall foundation. This study suggests that both Wenner and dipole-dipole array configurations should be utilised to detect buried wall foundations for 2D resistivity surveys.

Item Type: Article
Additional Information: Quarterly Journal of Engineering Geology and Hydrogeology, https://qjegh.lyellcollection.org, published by Geological Society of London, © Geological Society of London 2019.
Uncontrolled Keywords: near-surface geophysics, brownfield sites, electrical resistivity arrays, wall foundations, ERT, inversion
Subjects: Q Science > QC Physics
Q Science > QE Geology
Divisions: Faculty of Natural Sciences > School of Geography, Geology and the Environment
Related URLs:
Depositing User: Symplectic
Date Deposited: 15 Apr 2019 15:30
Last Modified: 15 Apr 2019 15:35
URI: http://eprints.keele.ac.uk/id/eprint/6189

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