Complex conductivity of soils
| Autor: | Revil, A., Coperey, A., Shao, Z., Florsch, N., Fabricius, Ida Lykke, Deng, Y., Delsman, J., Pauw, P., Karaoulis, M., de Louw, P.G.B., van Baaren, E.S., Dabekaussen, W., Menkovic, A., Gunnink, J.L. |
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| Přispěvatelé: | Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS), Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Quadrature conductivity
cation exchange capacity surface conductivity hydrogeophysics Geological Survey Netherlands induced polarization [SDU.STU]Sciences of the Universe [physics]/Earth Sciences complex conductivity Cation exchange capacity soil Spectral induced polarization 2015 Geo GM - Geomodelling [SDU]Sciences of the Universe [physics] ELSS - Earth Life and Social Sciences Surface conductivity 2015 Energy Geosciences |
| Zdroj: | Water Resources Research Water Resources Research, 2017, 53, pp.7121-7147. ⟨10.1002/2017WR020655⟩ Water Resources Research, 1-27 Revil, A, Coperey, A, Shao, Z, Florsch, N, Fabricius, I L, Deng, Y, Delsman, J, Pauw, P, Karaoulis, M, de Louw, P G B, van Baaren, E S, Dabekaussen, W, Menkovic, A & Gunnink, J L 2017, ' Complex conductivity of soils ', Water Resources Research, vol. 53, no. 8, WRCR22832, pp. 7121-7147 . https://doi.org/10.1002/2017WR020655 |
| DOI: | 10.1002/2017WR020655⟩ |
| Popis: | International audience; The complex conductivity of soils remains poorly known despite the growing importance of this method in hydrogeophysics. In order to fill this gap of knowledge, we investigate the complex conductivity of 71 soils samples (including four peat samples) and one clean sand in the frequency range 0.1 Hz to 45 kHz. The soil samples are saturated with six different NaCl brines with conductivities (0.031, 0.53, 1.15, 5.7, 14.7, and 22 S m-1, NaCl, 25°C) in order to determine their intrinsic formation factor and surface conductivity. This data set is used to test the predictions of the dynamic Stern polarization model of porous media in terms of relationship between the quadrature conductivity and the surface conductivity. We also investigate the relationship between the normalized chargeability (the difference of in-phase conductivity between two frequencies) and the quadrature conductivity at the geometric mean frequency. This data set confirms the relationships between the surface conductivity, the quadrature conductivity, and the normalized chargeability. The normalized chargeability depends linearly on the cation exchange capacity and specific surface area while the chargeability shows no dependence on these parameters. These new data and the dynamic Stern layer polarization model are observed to be mutually consistent. Traditionally, in hydrogeophysics, surface conductivity is neglected in the analysis of resistivity data. The relationships we have developed can be used in field conditions to avoid neglecting surface conductivity in the interpretation of DC resistivity tomograms. We also investigate the effects of temperature and saturation and, here again, the dynamic Stern layer predictions and the experimental observations are mutually consistent. |
| Databáze: | OpenAIRE |
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