Two-Dimensional Exponential Infiltration Equations
Publication: Journal of the Irrigation and Drainage Division
Volume 108, Issue 4
Abstract
Physical two-dimensional infiltration equations expressed in exponential form were developed based upon the four time intervals derived in an earlier study for one-dimensional infiltration. Assumptions that the loci of the wetting pattern for the two-dimensional infiltration are half-ellipses, and that their vertical and horizontal flow components can be described as one-dimensional infiltration. The developed equations were checked by laboratory experiments using the soil-box method at two (dry and wetter) soil-moisture levels. These experiments were conducted at the two controlled soil-moisture levels using aa clay-loam as a soil medium. For the dry soil moisture level, the computed and the measured infiltration rates were considered in good agreement (-1- 11). However, in the wetter soil-moisture level, the computed infiltration rates were smaller, by as much as -56, than the measured infiltration rates until 150 minutes of the infiltration time. The former were as much as 14% larger than the latter, ranging from 150 min. - 330 min. of the infiltration time. The results, in general, show good agreement in both soil samples considering only the arithmetic differences between the measured infiltration rates and the computed ones. The assumptions made in the derivation of the two-dimensional infiltration equations were found to be responsible to some extent. However, the discrepancy warrants further investigations and a table of experimental data is provided for such further work.
Get full access to this article
View all available purchase options and get full access to this article.
Information & Authors
Information
Published In
Journal of the Irrigation and Drainage Division
Volume 108 • Issue 4 • December 1982
Pages: 231 - 241
Copyright
© 1982 American Society of Civil Engineers.
History
Published in print: Dec 1982
Published online: Feb 11, 2021
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.