About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in SSSAJ

  1. Vol. 47 No. 5, p. 869-872
     
    Received: Oct 11, 1982


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2136/sssaj1983.03615995004700050005x

Linearized Moisture Flow with Root Extraction Over Two-Dimensional Zones1

  1. A. W. Warrick and
  2. D. O. Lomen2

Abstract

Abstract

A solution of Richards' equation is developed for flow from a two-dimensional, rectangular source or sink. The soil is assumed uniform with the unsaturated hydraulic conductivity exponentially related to pressure head. Steady-state conditions are used, although a time-dependent solution is discussed. The results are useful for approximating any two-dimensional, explicitly defined root extraction pattern. This is possible by superimposing several rectangles to give the desired effect. Calculations are rapid with negligible computer time. Several examples are given appropriate for trickle irrigation, including stratified uptake regions, noncontiguous extraction zones, and a nonsymmetric case.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America