Comparison of soil freezing curve and soil water curve data for Windsor sandy loam
Comparison of soil freezing curve and soil water curve data for Windsor sandy loam
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DOI：
10.1029/wr025i010p02205
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发表时间：
1988-10
影响因子：
5.4
通讯作者：
P. Black;A. R. Tice
中科院分区：
文献类型：
--
作者：
P. Black;A. R. Tice
在实验室中，利用脉冲核磁共振（PNMR）测量了温莎桑迪壤土的未冻水含量随温度的变化。PNMR数据与先前测得的土壤水分保持数据通过修改后的Clausius-Clapeyron方程，与表面张力适当的调整。转换后的实测未冻水含量数据和先前实测的土壤持水量数据由布鲁克斯和科里类型的方程表示，并确定了所需的一组回归参数。有人发现，一组参数足以正确地表达这些数据的行为时，施加适当的约束的未冻水含量数据。对传统形式的未冻水含量数据的表达的额外见解是根据空气或冰的进入压力。
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.