Hydrodynamic dispersion during absorption of water by soil: 2. Immobile water model

The assumptions and analysis of Part 1 are extended to the three model soil-water profiles having different immobile-water contents up to 0.08 m 3 m −3. Concentration profiles in the mobile zone obtained with a constant dispersion coefficient are compared with those calculated with the same dispersi...

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Bibliographic Details
Published inJournal of hydrology (Amsterdam) Vol. 65; no. 4; pp. 333 - 348
Main Authors Robin, M.J.L., Laryea, K.B., Elrick, D.E.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.1983
Subjects
soil chemistry
soil physics
soil science
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Summary:The assumptions and analysis of Part 1 are extended to the three model soil-water profiles having different immobile-water contents up to 0.08 m 3 m −3. Concentration profiles in the mobile zone obtained with a constant dispersion coefficient are compared with those calculated with the same dispersion coefficient and no immobile water. The average concentration profiles were calculated from the concentration of the solution in both the mobile and immobile phases. Increasing the immobile-water content decreased and shifted the average concentration profiles further into the soil. The values of the dispersion coefficient calculated with the immobile-water fraction ignored, were found to be water content dependent and many times greater than that of the input dispersion coefficient.
ISSN:0022-1694
1879-2707
DOI:10.1016/0022-1694(83)90085-9