Articles | Volume 22, issue 2
Hydrol. Earth Syst. Sci., 22, 1509–1523, 2018
https://doi.org/10.5194/hess-22-1509-2018
Hydrol. Earth Syst. Sci., 22, 1509–1523, 2018
https://doi.org/10.5194/hess-22-1509-2018
Research article
28 Feb 2018
Research article | 28 Feb 2018

Calibrating electromagnetic induction conductivities with time-domain reflectometry measurements

Giovanna Dragonetti et al.

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Cited articles

Abdu, H., Robinson, D. A., and Jones, S. B.: Comparing bulk soil electrical conductivity determination using the DUALEM-1S and EM38-DD electromagnetic induction instruments, Soil Sci. Soc. Am. J., 71, 189–196, https://doi.org/10.2136/sssaj2005.0394, 2007. 
Amezketa, E.: An integrated methodology for assessing soil salinization, a pre-condition for land desertification, J. Arid Environ., 67, 594–606, https://doi.org/10.1016/j.jaridenv.2006.03.010, 2006. 
Beard, L. P. and Nyquist, J. E.: Simultaneous inversion of airborne electromagnetic data for resistivity and magnetic permeability, Geophysics, 63, 1556–1564, 1998. 
Bechtold, M., Huisman, J. A., Weihermüller, L., and Vereecken, H.: Accurate determination of the bulk electrical conductivity with the TDR100 cable tester, Soil Sci. Soc. Am. J., 74, 495–501, 2010. 
Borchers, B., Uram, T., and Hendrickx, J. M. H.: Tikhonov regularization of electrical conductivity depth profiles in field soils, Soil Sci. Soc. Am. J., 61, 1004–1009, https://doi.org/10.2136/sssaj1997.03615995006100040002x, 1997. 
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Short summary
The paper aims to infer the bulk electrical conductivity distribution in the root zone from EMI readings. TDR measurements were used as ground-truth data to evaluate the goodness of the estimations by EMI inversion. The approach is based on the mean and standard deviation of the EMI and TDR series. It looks for the physical reasons for the differences between EMI- and TDR-based electrical conductivity and provides a correction of the bias based on the statistical sources of the discrepancies.