NDLI: Estimation of the Soil Water Characteristics from dielectric relaxation spectra

Content Provider	IEEE Xplore Digital Library
Author	Wagner, N. Daschner, F. Scheuermann, A. Schwing, M.
Copyright Year	2014
Description	Author affiliation: Geotech. Eng. Centre, Univ. of Queensland, Brisbane, QLD, Australia (Scheuermann, A.; Schwing, M.) \|\| Inst. of Mater. Res. & Testing, Bauhaus-Univ. Weimar, Weimar, Germany (Wagner, N.) \|\| Microwave Group, Univ. of Kiel, Kiel, Germany (Daschner, F.)
Abstract	The frequency dependence of dielectric material properties of water saturated and unsaturated porous materials such as soil is not only disturbing in applications with high frequency electromagnetic (HF-EM) techniques but also contains valuable information of the material due to strong contributions by interactions between the aqueous pore solution and mineral phases. Hence, broadband HF-EM sensor techniques enable the estimation of soil physico-chemical parameters such as water content, texture, mineralogy, cation exchange capacity and matric potential. In this context, a multivariate (MV) approach was applied to estimate the Soil Water Characteristic Curve (SWCC) from experimentally determined dielectric relaxation spectra of a silty clay soil. The results of the MV-approach were compared with results obtained from empirical equations and theoretical models as well as a novel hydraulic/electromagnetic coupling approach. The applied MV-approach gives evidence, (i) of a physical relationship between soil dielectric relaxation behavior and soil water characteristics as an important hydraulic material property and (ii) the applicability of appropriate sensor techniques for the estimation of physico-chemical parameters of porous media from broadband measured dielectric spectra.
Sponsorship	IEEE Instrum. Meas. Soc.
Starting Page	242
Ending Page	247
File Size	1470814
Page Count	6
File Format	PDF
e-ISBN	9781479921799
DOI	10.1109/SAS.2014.6798954
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-02-18
Publisher Place	New Zealand
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Water Soil measurements Soil Dielectrics Frequency measurement Mathematical model Permittivity
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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