| Download | - View final version: Locating the frozen-unfrozen interface in soils using time-domain reflectometry (PDF, 787 KiB)
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| Author | Search for: Baker, T. H. W.1; Search for: Davis, J. L.; Search for: Hayhoe, H. N.; Search for: Topp, G. C. |
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| Affiliation | - National Research Council of Canada
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| Format | Text, Article |
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| Subject | permafrost; soils; soil mechanics; freezing; electromagnetic properties; frozen soils; soil freezing; temperature measurements; dielectric constant; time-domain reflectometry (tdr) |
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| Abstract | The time-domain reflectometry technique was compared with the temperature measurement method for locating the frozen- unfrozen interface in water and sandy soils. This technique depends on the high-frequency (1-1000 MHz) electrical properties of water that change significantly and abruptly between the liquid and solid phases. Parallel wire transmission lines were inserted into the soil to guide electromagnetic pulses produced by a time-domain reflectometer (TDR). The frozen-unfrozen interface produced reflections measured by the TDR which were in turn used to locate the interface as it moved along the transmission line. In the laboratory it was possible to locate the interface using the TDR to within + or - 0.5 cm and in the field to within + or - 2.4 cm. These errors were equal to those associated with the temperature measurements. |
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| Publication date | 1982 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Identifier | DBR-P-1048 |
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| NRC number | NRCC 20584
NRC-IRC-129 |
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| NPARC number | 20378723 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 085a9ec9-d94f-405d-a13d-8e7c0f0ccfd5 |
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| Record created | 2012-07-24 |
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| Record modified | 2024-03-22 |
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