New in situ techniques for the estimation of the dielectric properties and moisture content of soils | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  New in situ techniques for the estimation of the dielectric properties and moisture content of soils

Type de publication:

Journal Article

Source:

Comptes Rendus Geoscience, Volume 341, Ticket 10-11, p.831-845 (2009)

ISBN:

1631-0713

Numéro d'accès:

ISI:000271785200005

URL:

http://www.sciencedirect.com/science/article/pii/S1631071309001722

Mots-clés:

UMR 7154 ; Dynamique des fluides géologiques ; Capacitance; Dielectric characterization; Hyperfrequency; Moisture content; Monopole; Permittivity; Soil

Résumé:

<p>Two original in situ HF techniques of dielectric characterization in two wide bands have been developed in order to estimate the moisture content of soils by complex impedance measurement. These techniques are based on the capacitive effect (1-20 MHz) and on the propagation of electromagnetic waves at high frequencies (0.1-4 GHz). The two measurement techniques use straight conductors that are inserted into the soil. Specific inversion algorithms were developed to estimate the apparent real permittivity of the soil versus frequency from the complex impedance. The validation of both instruments was made in the laboratory in the presence of dry and wet sands. In situ experiments were also made at high frequencies. These complementary devices should enlarge the range of usual soil moisture measurement techniques. To cite this article: J.-P Frangi et al., C. R. Geoscience 341 (2009). (C) 2009 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.</p>

Notes:

Frangi, Jean-Pierre Richard, Daniel-Christian Chavanne, Xavier Bexi, Idris Sagnard, Florence Guilbert, Vincent Workshop on Hydrogeophysics OCT 10-12, 2007 Autrans, FRANCE Sp. Iss. SI