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Published in Soil Sci Soc Am J 51:282-287 (1987)
© 1987 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Solute Transport During Absorption and Infiltration: A Comparison of Analytical Approximations1

D. E. Elrick, B. E. Clothier and J. E. Smith2

ABSTRACT

Several analytical solutions of one-dimensional solute transport during infiltration have been reported. This study links these solutions by starting with the exact integral solution, followed by successive approximations in order to arrive at the simplest approximate solution. A number of planes of separation are defined and the physical significance of these planes is discussed using model soil-water profiles. The retardation effect of adsorbed chemicals, such as many fertilizers and pesticides, can easily be included in the analysis when the partition coefficient is known. Experimental and predicted absorption and infiltration profiles of KCl into Brookston silty clay loam [Orthic Humic Gleysol (Can.), Typic Haplaquolls (USA)] compared favorably using the simplest (field applicable) approximation.

NOTES

1 Contribution from the Dep. of Land Resource Science, Univ. of Guelph, Guelph, Ontario, Canada N1G 2W1. The authors acknowledge support from the Natural Sciences and Engineering Research Council of Canada and the Ontario Ministry of Agriculture and Food.

2 Professor of Soil Physics, Univ. of Guelph; Visiting Professor on leave from Plant Physiology Division, DSIR, New Zealand; and Graduate Student, Univ. of Guelph.

Received for publication December 26, 1985.




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Copyright © 1987 by the Soil Science Society of America.