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

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TypeArticle
Journal titleCanadian Geotechnical Journal
ISSN0008-3674
Volume24
Issue1
Pages16063; # of pages: 98
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
AbstractA 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.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierIRC-P-1457
NRC number27645
547
NPARC number20375284
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Record identifier036a59c9-10f2-4f30-873d-4832310a6715
Record created2012-07-23
Record modified2016-05-09
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