Boundary element modeling of a capacitive probe for in situ soil moisture characterization

Author

Straub, Andreé

Author_Institution

Bur. de Recherches Geol. et Minieres, Orleans, France

Volume

32

Issue

2

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

261

Lastpage

266

Abstract

There has been a need for accurate numerical modeling of a capacitive probe dedicated to the in situ characterization of soil moisture in measuring the dielectric permittivity of the soil. The objectives of the author´s modeling were to understand the quantitative response of the probe, to optimize the shape of the probe, and to enable accurate calibration. In comparison with other numerical methods (such as the finite element method), the boundary element method appears straightforward and economical. The author presents a generalized version of this method in the case of an axisymmetrical geometry within the quasi-static limit. Numerical results are discussed and compared with the approximation of a lumped circuit

Keywords

geophysical techniques; hydrological equipment; moisture measurement; soil; axisymmetrical geometry; boundary element model; boundary integral equation; capacitive probe; dielectric permittivity; equipment instrument; geophysical measurement technique; hydrology; in situ characterization; numerical model; probe shape; quasistatic limit; soil moisture; water content; Calibration; Dielectric measurements; Finite element methods; Moisture measurement; Numerical models; Permittivity measurement; Probes; Shape; Soil measurements; Soil moisture;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/36.295040

Filename

295040