HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Bresler, E. Articles by Goldberg, D. Search for Related Content PubMed Articles by Bresler, E. Articles by Goldberg, D. Agricola Articles by Bresler, E. Articles by Goldberg, D.

Infiltration from a Trickle Source: II. Experimental Data and Theoretical Predictions¹

ABSTRACT

The theory of transient infiltration from a trickle source, as developed in Part I of this work, was compared with experimental results. Laboratory experiments using a loamy soil were conducted under conditions similar to those assumed in the two-dimensional plane flow model. Field data were collected from a sandy soil that was wetted by commercial trickles. The field conditions were similar to those assumed in the cylindrical model. The effect of trickle discharge rates on the water content distribution and on the location of the wetting front was considered. The functional relationship between water diffusivity and water content was estimated by a computer technique that complements the conventional method for diffusivity determination. These data, together with the soil water retention curve were used to estimate the hydraulic conductivity as a function of water content. The agreement between theory and experiment, as expressed by water content distribution and location of the wetting front, is generally good and suggests that the theory is applicable to many field situations. Significant discrepancies between observed and theoretical results were obtained only in one case, where the rate of trickle infiltration was large. The theory, as well as the experimental data, indicate that for the conditions studied, an increase in the trickle discharge rate results in an increase in the horizontal wetted area and a decrease in the soil wetted depth.

¹ Contribution from The Volcani Institute of Agricultural Research, Bet Dagan, Israel. 1971 Series no. 1827-E; The Hebrew University of Jerusalem and the Department of Applied Mathematics, The Weizmann Institute of Science, Rehovot, Israel.

² Soil Physicists, The Volcani Inst. of Agr. Res.; Graduate Student, The Weizmann Inst. of Sci.; Graduate Student, The Hebrew Univ. of Jerusalem; Mathematician, The Weizmann Inst. of Sci.; and Associate Professor of Irrigation, The Hebrew Univ. of Jerusalem.

Received for publication January 6, 1971. Accepted for publication April 30, 1971.