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Measurement of soil water content using the combined time-domain reflectometry - thermal conductivity probe

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
  2. National Research Council of Canada
FormatText, Article
Subjectmoisture content; soils; hygrothermal measuring instruments; dielectric constants of soils; transient line heat source probe; parallel transmission line; volumetric water content; sensitivity; soil-dependent empirical relation; sol; instrument de mésure hygrothermique
Abstract
A two-pronged metal probe measures the thermal conductivity and apparent dielectric constant of soils in the laboratory and in the field. One prong acts as a transient line heat source probe in measuring thermal conductivity. The apparent dielectric constant of the soil is determined by the time-domain reflectometry (TDR) technique, using both prongs as a parallel transmission line. Volumetric water content is determined from the apparent dielectric constant, making use of an empirical relation valid for most soils. The combined probe provides a means of monitoring the water content of soils over a wide range of values, in the field and in the laboratory.
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  • Canadian Geotechnical Journal 24, no. 1 (February 1987): 160–63.
LanguageEnglish
Peer reviewedYes
IdentifierIRC-P-1457
NRC numberNRCC 27645
NRC-IRC-547
NPARC number20375284
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Record identifier036a59c9-10f2-4f30-873d-4832310a6715
Record created2012-07-23
Record modified2020-06-06
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