Articles | Volume 25, issue 4
Research article
07 Apr 2021
Research article |  | 07 Apr 2021

Exploring the regolith with electrical resistivity tomography in large-scale surveys: electrode spacing-related issues and possibility

Laurent Gourdol, Rémi Clément, Jérôme Juilleret, Laurent Pfister, and Christophe Hissler

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Cited articles

Abdullah, F. M., Loke, M. H., Nawawi, M., and Abdullah, K.: Assessing the reliability and performance of optimized and conventional resistivity arrays for shallow subsurface investigations, J. Appl. Geophys., 155, 237–245, 2018. 
Ahrens, J., Geveci, B., and Law, C.: ParaView: An End-User Tool for Large Data Visualization, in: Visualization Handbook 2005, edited by: Hansen, C. D. and Johnson, C. R., Butterworth-Heinemann, 717–731,, 2005. 
Alamry, A. S., van der Meijde, M., Noomen, M., Addink, E. A., van Benthem, R., and de Jong, S. M.: Spatial and temporal monitoring of soil moisture using surface electrical resistivity tomography in Mediterranean soils, Catena, 157, 388–396, 2017. 
Allroggen, N., Beiter, D., and Tronicke, J.: Ground-penetrating radar monitoring of fast subsurface processes, Geophysics, 85, 19–23, 2020. 
Ameli, A. A., Amvrosiadi, N., Grabs, T., Laudon, H., Creed, I. F., McDonnell, J. J., and Bishop, K.: Hillslope permeability architecture controls on subsurface transit time distribution and flow paths, J. Hydrol., 543, 17–30, 2016. 
Short summary
Electrical resistivity tomography (ERT) is a remarkable tool for characterizing the regolith, but its use over large areas remains cumbersome due to the requirement of small electrode spacing (ES). In this study we document the issues of using oversized ESs and propose a new approach to overcome this limitation. We demonstrate that our protocol significantly improves the accuracy of ERT profiles using large ES and offers a cost-effective means for carrying out large-scale surveys.