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 Warrick, A. W. Search for Related Content PubMed Articles by Warrick, A. W. Agricola Articles by Warrick, A. W.

Solution to the One-Dimensional Linear Moisture Flow Equation with Water Extraction¹

ABSTRACT

The one-dimensional, steady-state moisture flow equation is solved for arbitrary plant water withdrawal functions using the matric flux potential of earlier investigators to obtain a linearized form. A semi-infinite flow medium and a finite-depth medium overlying a shallow water table are considered with the surface boundary condition taken as a flux. Tables are presented giving the matric flux potential (from which the pressure head is easily determined) for several withdrawal functions. Numerical examples show the effects of different surface fluxes and rooting depths on the matric flux potential and pressure-head profiles. The results are particularly relevant for high-frequency irrigation.

¹ Arizona Agr. Exp. Sta. Paper no. 2217. Support was from Western Regional Project W-128 and funds provided by the United States Department of the Interior, Office of Water Resources Research, as authorized under the Water Resources Research Act of 1964, Project B-035-ARIZ.

² Associate Professor, Department of Soils, Water and Engineering, The University of Arizona, Tucson, Ariz. 85721.

Received for publication November 19, 1973. Accepted for publication March 11, 1974.