INTERPRETATION OF ELECTRICAL-RESISTANCE SOIL MOISTURE DATA FOR A FREEZE-THAW ENVIRONMENT
Open Access
- 1 June 1971
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Soil Science
- Vol. 51 (2) , 249-259
- https://doi.org/10.4141/cjss71-032
Abstract
The value of electrical-resistance measurements from soil moisture blocks in a freeze-thaw environment can be enhanced by laboratory calibration in the subzero temperature range to provide a measure of unfrozen water contents. Laboratory studies show that, in the temperature range of incipient freezing and thawing (−3 to 0 C) electrical resistance as measured with Colman fiberglas resistance blocks is independent of temperature. At temperatures less than −3 C, electrical resistance is dependent upon both the nature of the porous medium and temperature, but is independent of the total water content of the soil-water system. Results from the laboratory investigations are extended to the interpretation of field measurements of electrical resistance for a soil profile at Calgary, Alberta, Canada.Keywords
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- Some thermodynamic relationships for soils at or below the freezing point: 1. Freezing point depression and heat capacityWater Resources Research, 1968
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