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| DOI: | 10.2136/sssaj2013.05.0182 |
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| Web URL(s): | https://acsess.onlinelibrary.wiley.com/doi/10.2136/sssaj2013.05.0182
Last checked: 02/26/2024
Access conditions: Item is within a limited-access website
https://acsess.onlinelibrary.wiley.com/doi/epdf/10.2136/sssaj2013.05.0182
Last checked: 02/26/2024
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Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Davis, Dedrick D.;
Horton, Robert;
Heitman, Joshua L.;
Ren, Tusheng |
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| Author Affiliation: | Davis: Dep. of Biological and Environ. Sci., Alabama A&M Univ., Normal, AL; Horton: Dep. of Agronomy, Iowa State Univ., Ames, IA; Heitman: Dep. of Soil Science, North Carolina State Univ., Raleigh, NC; Ren: Dep. of Soil and Water, China Agricultural Univ., Beijing, China |
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| Title: | An experimental study of coupled heat and water transfer in wettable and artificially hydrophobized soils |
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| Section: | Soil physics
Other records with the "Soil physics" Section
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| Source: | Soil Science Society of America Journal. Vol. 78, No. 1, January/February 2014, p. 125-132. |
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| Publishing Information: | Madison, Wisconsin: Soil Science Society of America |
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| # of Pages: | 8 |
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| Related DOI | 10.2134/csa2014-59-3-4 (CSA News summary) |
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| Keywords: | TIC Keywords: Heat transfer; Hydrophobic soils; Soil moisture; Temperatures; Thermal conductivity; Volumetric water content; Water transfer
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| Abstract/Contents: | "The effect of soil wettability on coupled heat and water transfer in soil is not well understood. The objective of this work was to determine the effect of soil wettability on coupled heat and water transfer for two wettable soils and their artificially hydrophobized counterparts. Closed soil cells instrumented with heat-pulse sensors provided in situ measurements of soil temperature, soil volumetric water content (Θ), soil thermal conductivity (λ), and soil thermal diffusivity (α). Nonlinear temperature distributions developed in response to the 150°C m-1 temperature gradients applied to the soil cells for both the wettable and hydrophobized soils due to soil moisture redistribution. Hydrophobized sand and silt loam soils had different responses relative to their wettable counterparts. Soil moisture redistribution was similar in the wettable and hydrophobized sand soils. Net water transfer was reduced by 56% in the hydrophobized silt loam compared with the wettable silt loam. Reduced net water transfer in the hydrophobized silt loam indicated that water vapor transfer must have been lower in the hydrophobized silt loam than in the wettable silt loam. Diffusive pathways for water vapor may increase due to hydrophobicity. In both the wettable and hydrophobized soils, λ and α decreased in the warm regions and increased in the cold regions of the soil cells due to soil moisture redistribution. Wettability is a function of water content, and relative to wettable soil, water redistribution in hydrophobized soil is reduced only when the water content is small enough for the soil to behave as hydrophobic. If the water content is large enough for a hydrophobized soil to behave as wettable, water redistribution is similar to that in a wettable soil." |
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| Language: | English |
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| References: | 44 |
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| Note: | Summary appears in CSA News, 59(3) March 2014, p. 14 with additional picture
Equations
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Tables
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Davis, D. D., R. Horton, J. L. Heitman, and T. Ren. 2014. An experimental study of coupled heat and water transfer in wettable and artificially hydrophobized soils. Soil Science Society of America Journal. 78(1):p. 125-132. |
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| DOI: 10.2136/sssaj2013.05.0182 |
| Web URL(s):
https://acsess.onlinelibrary.wiley.com/doi/10.2136/sssaj2013.05.0182
Last checked: 02/26/2024
Access conditions: Item is within a limited-access website
https://acsess.onlinelibrary.wiley.com/doi/epdf/10.2136/sssaj2013.05.0182
Last checked: 02/26/2024
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2199342a |
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