A Thermodynamic Formulation of Water Potential in Soil

Zhang, Chao; Gou, Lingyun; Hu, Shaojie; Lu, Ning

doi:10.1029/2022wr032369

Cited by 16 publications

(5 citation statements)

References 59 publications

(112 reference statements)

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“…Both of them are often modified by water-salt transport, frost heave and thawing in the environmental system (Greco & Gargano, 2015;S. Hu et al, 2023;C. Zhang et al, 2022).…”

Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

“…Increasing concentration increases the osmotic potential, and at very high concentrations, the soil water potential is high even in a soil water environment with large pores (weak water holding capacity and low matric potential). Then, the change of matric potential has a relatively small effect on soil water potential (Greco & Gargano, 2015; S. Hu et al., 2023; C. Zhang et al., 2022).…”

Section: Resultsmentioning

confidence: 99%

“…The matric potential is controlled by the soil pore size, while the osmotic potential by the salinity. Both of them are often modified by water‐salt transport, frost heave and thawing in the environmental system (Greco & Gargano, 2015; S. Hu et al., 2023; C. Zhang et al., 2022). Therefore, freeze‐thaw takes a greater impact on the total soil water potential under natural conditions.…”

Section: Resultsmentioning

confidence: 99%

“…From the theory of soil water potential (Greco & Gargano, 2015; S. Hu et al., 2023; C. Zhang et al., 2022): in the soil large pore, due to the relatively weak water holding capacity of soil particles (matric potential in the soil water potential accounted for a smaller proportion), the content of gravity water and capillary water are very high. At this point, the osmotic potential energy controls the nature of the pore water.…”

Section: Resultsmentioning

confidence: 99%

“…Then, the change of matric potential has a relatively small effect on soil water potential (Greco & Gargano, 2015;S. Hu et al, 2023;C. Zhang et al, 2022).…”

Section: Thementioning

confidence: 99%

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Study on the Supercooling Characteristics of Freezing Soil Based On Nucleation Theory

Wang,

Li,

Lin

et al. 2023

Water Resources Research

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The clarification of freezing in a soil‐water system is critical for assessing the formation of a freezing zone and liquid water flow. The supercooling phenomenon of soil pore solutions has been found during the freezing process, but the mechanism remains poorly understood. In this study, we propose a free energy function of soil‐water systems based on the Classical Nucleation Theory. The analytical solution of the critical nucleation problem of saline soil‐water system is obtained by combining the initial freezing temperature model and Pitzer activity coefficients model in electrolyte solutions. Then, the freezing‐thawing experiments of saline soil with various salt contents were conducted for verifying the analytical solution. The derived boundary nucleation rate is the quantitative solution of the critical condition for the supercooling. The findings suggested that the theory results agreed well with the experiment results. For the salt‐free soil‐water system, the critical maximum radius of supercooling was 7.15 nm. We compared eight classical ice‐water interfacial tension models, and the “Reinhardt & Doye” and “DeMott & Rogers” models showed excellent performance when using the new free energy theoretical framework to predict the crystallization nucleation rate of soil‐water systems. A positive correlation between the boundary nucleation rate and soil‐water potential is detected. According to the influencing factors, the boundary nucleation rate of soil‐water system can be divided into three zones: salt nature control zone (R > 100 μm), salt‐pore mixed control zone (100 μm > R > 100 nm), and pore size control zone (R < 100 nm).

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“…Both of them are often modified by water-salt transport, frost heave and thawing in the environmental system (Greco & Gargano, 2015;S. Hu et al, 2023;C. Zhang et al, 2022).…”

Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Then, the change of matric potential has a relatively small effect on soil water potential (Greco & Gargano, 2015;S. Hu et al, 2023;C. Zhang et al, 2022).…”

Section: Thementioning

confidence: 99%

See 3 more Smart Citations