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Comparison of soil freezing curve and soil water curve data for Windsor sandy loam
Author(s) -
Black Patrick B.,
Tice Allen R.
Publication year - 1989
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr025i010p02205
Subject(s) - loam , water content , soil science , water retention curve , soil water , pedotransfer function , environmental science , windsor , field capacity , hydrology (agriculture) , geotechnical engineering , geology , hydraulic conductivity
Unfrozen water content as a function of temperature was measured in the laboratory using pulsed nuclear magnetic resonance (PNMR) for a Windsor sandy loam soil. The PNMR data were related to previously measured soil moisture retention data through the modified Clausius‐Clapeyron equation, with suitable adjustment for surface tension. The transformed measured unfrozen water content data and the previously measured soil moisture retention data were expressed by a Brooks and Corey type of equation with the required set of regression parameters determined. It was found that a single set of parameters were sufficient to correctly express the behavior of these data when suitable constraints were imposed on the unfrozen water content data. Additional insight into the traditional form of expressing unfrozen water content data is presented in terms of air or ice entry pressure.