Calibration functions for estimating soil moisture from GPR dielectric constant measurements

Van Dam, Remke L. (2014) Calibration functions for estimating soil moisture from GPR dielectric constant measurements. Communications in Soil Science and Plant Analysis, 45(3), pp. 392-413.

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Abstract

Ground-penetrating radar (GPR) is widely used for assessment of soil moisture variability in field soils. Because GPR does not measure soil water content directly, it is common practice to use calibration functions that describe its relationship with the soil dielectric properties and textural parameters. However, the large variety of models complicates the selection of the appropriate function. In this article an overview is presented of the different functions available, including volumetric models, empirical functions, effective medium theories, and frequency-specific functions. Using detailed information presented in summary tables, the choice for which calibration function to use can be guided by the soil variables available to the user, the frequency of the GPR equipment, and the desired level of detail of the output. This article can thus serve as a guide for GPR practitioners to obtain soil moisture values and to estimate soil dielectric properties.

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ID Code: 71208
Item Type: Journal Article
Refereed: Yes
DOI: 10.1080/00103624.2013.854805
ISSN: 1532-2416
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute for Future Environments
Deposited On: 08 May 2014 00:42
Last Modified: 19 Jun 2014 04:44

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