Articles | Volume 2, issue 2
https://doi.org/10.5194/soil-2-241-2016
https://doi.org/10.5194/soil-2-241-2016
Original research article
 | 
20 Jun 2016
Original research article |  | 20 Jun 2016

Nonstationarity of the electrical resistivity and soil moisture relationship in a heterogeneous soil system: a case study

Didier Michot, Zahra Thomas, and Issifou Adam

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Cited articles

Adam, I., Michot, D., Guero, Y., Soubega, B., Moussa, I., Dutin, G., and Walter, C.: Detecting soil salinity changes in irrigated Vertisols by electrical resistivity prospection during a desalinisation experiment, Agr. Water Manage., 109, 1–10, https://doi.org/10.1016/j.agwat.2012.01.017, 2012.
Al Hagrey, S. A.: Geophysical imaging of root-zone, trunk, and moisture heterogeneity, J. Exp. Bot., 58, 839–854, https://doi.org/10.1093/jxb/erl237, 2007.
Al Hagrey, S. A. and Michaelsen, J.: Resistivity and percolation study of preferential flow in vadose zone at Bokhost, Germany, Geophysics, 64, 746–753, 1999.
Al Hagrey, S. A. and Petersen, T.: Numerical and experimental mapping of small root zones using optimized surface and borehole resistivity tomography, Geophysics, 76, 25–35, 2011.
Amato, M., Basso, B., Celano, G., Bitella, G., Morelli, G., and Rossi, R.: In situ detection of tree root distribution and biomass by multi-electrode resistivity imaging, Tree Physiol., 28, 1441–1448, 2008.
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Short summary
This study focuses on temporal and spatial soil moisture changes along a toposequence crossed by a hedgerow, using ERT and occasional measurements. We found that the relationship between ER and soil moisture had two behaviors depending on soil heterogeneities. ER values were consistent with occasional measurements outside the root zone. The shift in this relationship was controlled by root system density and a particular topographical context in the proximity of the hedgerow.