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Book: Field Soil Water Regime
Published by: Soil Science Society of America

 

This chapter in FIELD SOIL WATER REGIME

  1.  p. 9-35
    sssa special publication 5.
    Field Soil Water Regime

    R.R. Bruce (ed.)

    ISBN: 978-0-89118-900-8

     
    Published: 1973


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doi:10.2136/sssaspecpub5.c2

Soil Water Flow Theory and Its Application in Field Situations1

  1. A. Klute2

Abstract

The soil water flow theory based on the Darcy equation provides a first approximation to the description and prediction of soil water behavior. Solutewater and heat-water interactions may in some situations produce significant deviations from the Darcy-based flow theory. Methods of application of flow concepts range from their use as general, qualitative background, through various approximate uses of flow equations, to full-scale detailed prediction of the behavior of a given field flow situation. The latter is not generally feasible because of the cost and lack of the detailed knowledge of the pertinent hydraulic properties of the soil. The lack of rapid, reliable, routine methods of assessing the water flow properties of soils, and the difficulties of coping with the spatial and temporal variability of these properties are important barriers to the quantitative application of the flow theory.

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Copyright © 1973. Copyright © 1973 by the Soil Science Society of America, Inc., 5585 Guilford Rd., Madison, WI 53711 USA