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Published in Soil Sci Soc Am J 34:369-372 (1970)
© 1970 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Evaluation of the Intrisic-Penetrability and -Diffusivity Concepts To Predict Horizontal Infiltration in Porous Media1

M. A. Mustafa, J. Letey and C. L. Watson2

ABSTRACT

The equations {lambda} = {lambda}i[({gamma}/{eta}) cos H]1/2 and D = Di[({gamma}/{eta}) cos H] have been presented to describe the effect of surface tension, {gamma}, viscosity, {eta}, and solid-liquid contact angle, H, on penetrability, {lambda}, and diffusivity D, where {lambda}i and Di are the intrinsic penetrability and diffusivity, respectively. The equations were tested by studying horizontal liquid-infiltration at 2 mbars suction of nine organic liquids and 0.01N CaSO4 in glass beads, Pachappa clay loam, and a water-repellent soil. The equations were found to describe infiltration quite well for all liquids studied in glass beads and Pachappa soil. The equations apply to organic liquids but not to 0.01N CaSO4 in a water-repellent soil.

NOTES

1 Contribution of the Department of Soils and Plant Nutrition, University of California, Riverside, Calif. Research supported by matching fund project B-072-CAL of the Office of Water Resources Research, United States Department of the Interior as authorized under the Water Resources Research Act of 1964 and implemented by the University of California Water Resources Center as Project W-206 and by the Forest Service, USDA, Washington, D.C. grant no. 4000.

2 Graduate Student, Professor of Soil Physics and Graduate Student, respectively.

Received for publication September 29, 1969. Accepted for publication December 9, 1969.






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