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An amended functional leaching model applicable to structured soils. II. Model application
Author(s) -
HALL D. G. M.,
WEBSTER C. P.
Publication year - 1993
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1993.tb02324.x
Subject(s) - macropore , soil water , leaching (pedology) , lysimeter , soil science , chemistry , soil texture , leaching model , potassium , porosity , potassium bromide , environmental science , environmental chemistry , soil salinity , inorganic chemistry , mesoporous material , biochemistry , organic chemistry , catalysis
SUMMARY The performance of a functional leaching model (Hall, 1993) is compared with leaching data from two lysimeter experiments with soils of contrasting texture using sodium bromide and potassium chloride as the non‐reactive solutes. The model parameters are optimized using the solute elution curves as standards and compared with the physical properties of the soil. A good match with the measured discharge of both water and solute was achieved for both soils using the moisture release characteristics to define the pore volume available for mobile and immobile water. The results indicate that preferential flow takes place through even coarse‐textured soils but that there is negligible diffusive exchange of solute between water passing through the macropores and the rest of the soil.