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Water Vapor Diffusion in Relatively Dry Soil: I. Theoretical Considerations and Sorption Experiments
Author(s) -
Jackson Ray D.
Publication year - 1964
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1964.03615995002800020014x
Subject(s) - sorption , diffusion , evaporation , water vapor , chemistry , vapor pressure , water content , water transfer , condensation , soil water , mass transfer , thermodynamics , vapour pressure of water , analytical chemistry (journal) , environmental chemistry , soil science , chromatography , environmental science , adsorption , organic chemistry , geology , physics , geotechnical engineering , water resource management
Water transfer was measured in three soil materials at water content ranges corresponding to a relative pressure range of 0.97 to about 0.05. At these water contents vapor flow is probably the predominant transfer mechanism. The data were obtained from a transient sorption experiment and diffusion coefficients were calculated from analyses of water content distribution curves. The evaporation‐condensation reaction between the liquid and vapor phases was treated by using simultaneous diffusion‐reaction theory. Within the water content ranges used the diffusion coefficients increase and then decrease with increasing water content.