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Soil Science Society of America Journal Abstract - DIVISION S-1-SOIL PHYSICS

A Note on Calculating Hysteretic Behavior


This article in SSSAJ

  1. Vol. 64 No. 6, p. 1947-1950
    Received: Nov 4, 1999

    * Corresponding author(s): lhyd4kag@auadec.aua.gr
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  1. A. Poulovassilis * and
  2. G. Kargas
  1. Agricultural University of Athens, Iera odos 75, 11855 Athens, Greece


A computational procedure for approximating the hysteretic relationship between pore water content and pressure head in porous bodies is described. A distribution function F is introduced that retains the features of the distribution function F of the independent domain model, but its values are obtained by partitioning the slopes of the wetting boundary curve of a reproducible hysteresis loop proportionately to the slopes of the drying boundary curve or vice versa. With the help of data provided by a primary drying scanning curve the procedure can be extended to approximate the hysteretic curves in the presence of nonindependent water elements. Calculated scanning curves were compared with experimental ones and satisfactory agreement between calculated and experimental scanning curves was observed.

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