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Record #92815:
- #92815
Main publication details
MARC recordMeasurement of the unfrozen water content of soils: comparison of NMR and TDR methods / Michael W. Smith, Allen R. Tice.
| Title: | Measurement of the unfrozen water content of soils: comparison of NMR and TDR methods / Michael W. Smith, Allen R. Tice. |
| Author(s): | Smith, Michael W. Tice, Allen R. |
| Date: | 1988. |
| Publisher: | Hanover, NH: US Army Cold Regions Research and Engineering Laboratory |
| In: | CRREL Report. (1988.), Vol. 88-18 (1988) |
| Abstract: | Describes testing programme carried out to compare two methods for determining unfrozen water content of frozen soils. Nuclear magnetic resonance provides fast, accurate method for use in laboratory, while time domain reflectometry can be used for both in situ field measurements and laboratory experiments. TDR does not require special calibration for most practical purposes. Results obtained from combined experiments, based on 25 soils covering wide range of commonly encountered specific surface areas, yield relationship between apparent dielectric constant and unfrozen water content that is only very slightly dependent on soil type. Use of this relationship implies likely error of 0.03 cm³ cm⁻³, although this may be reduced by calibrating for individual soils. |
| Notes: | CRREL Report. Vol. 88-18 :ii, 11 p. (1988). |
| Keywords: | 551.341 -- Permafrost and frozen ground, equipment for investigating. 551.345 -- Permafrost. Cryopedology. 536.421.4 -- Freezing. E8 -- Glaciology: frost action and permafrost. |
| SPRI record no.: | 92815 |
LDR 01678naa#a2200000#a#4500 001 SPRI-92815 005 20240418112526.0 007 ta 008 240418s1988####nhua##|##|###|0||#0|eng#d 035 ## ‡aSPRI-92815 040 ## ‡aUkCU-P‡beng‡eaacr 100 1# ‡aSmith, Michael W. 245 10 ‡aMeasurement of the unfrozen water content of soils :‡bcomparison of NMR and TDR methods /‡cMichael W. Smith, Allen R. Tice. 260 ## ‡aHanover, NH :‡bUS Army Cold Regions Research and Engineering Laboratory,‡c1988. 300 ## ‡aii, 11 p. :‡bdiags., tables. 500 ## ‡aCRREL Report. Vol. 88-18 :ii, 11 p. (1988). 520 3# ‡aDescribes testing programme carried out to compare two methods for determining unfrozen water content of frozen soils. Nuclear magnetic resonance provides fast, accurate method for use in laboratory, while time domain reflectometry can be used for both in situ field measurements and laboratory experiments. TDR does not require special calibration for most practical purposes. Results obtained from combined experiments, based on 25 soils covering wide range of commonly encountered specific surface areas, yield relationship between apparent dielectric constant and unfrozen water content that is only very slightly dependent on soil type. Use of this relationship implies likely error of 0.03 cm³ cm⁻³, although this may be reduced by calibrating for individual soils. 650 07 ‡a551.341 -- Permafrost and frozen ground, equipment for investigating.‡2udc 650 07 ‡a551.345 -- Permafrost. Cryopedology.‡2udc 650 07 ‡a536.421.4 -- Freezing.‡2udc 650 07 ‡aE8 -- Glaciology: frost action and permafrost.‡2local 700 1# ‡aTice, Allen R. 773 0# ‡7nnas ‡tCRREL Report. ‡gVol. 88-18 (1988) ‡wSPRI-54834 917 ## ‡aUnenhanced record from Muscat, imported 2019 948 3# ‡a20240418