SSSAJ Grow Your Career with SSSA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Soil Sci Soc Am J 36:251-256 (1972)
© 1972 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via ISI Web of Science (10)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Watson, K. K.
Right arrow Articles by Whisler, F. D.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Watson, K. K.
Right arrow Articles by Whisler, F. D.
GeoRef
Right arrow GeoRef Citation
Agricola
Right arrow Articles by Watson, K. K.
Right arrow Articles by Whisler, F. D.

Numerical Analysis of Drainage of a Heterogeneous Porous Medium1

K. K. Watson and F. D. Whisler2

ABSTRACT

The gravity drainage of a heterogeneous porous medium was studied using a numerical solution of the flow equation. The medium was assumed to exhibit scale heterogeneity, the heterogeneity being specifically defined in terms of a linear variation of the saturated hydraulic conductivity with depth. Within the restrictions imposed by scale heterogeneity, the hydrologic characteristics were chosen so that their form validly represented real data. The spatial variation of the hydrologic characteristics was initially defined in terms of the air entry value of the medium at the point in question and an empirical relationship between the air entry value and the saturated hydraulic conductivity. Pressure head and water content profiles were obtained for three hydraulic conductivity distributions in which the conductivity decreased with depth. The pressure head profiles for these distributions revealed clearly the zones of positive pressures in the profiles and the slow decay of these pressures during drainage.

NOTES

1 Contribution of the Soil & Water Conservation Research Division, ARS, USDA, Phoenix, Ariz.

2 Research Civil Engineer and Research Soil Scientist, respectively, US Water Conservation Laboratory, 4331 E. Broadway, Phoenix, Ariz. 85040. This paper was written while the senior author was on leave from The University of New South Wales, Kensington, N.S.W., Australia.

Received for publication August 30, 1971. Accepted for publication November 29, 1971.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1972 by the Soil Science Society of America.