EFFECT OF HYSTERESIS ON THE PREDICTION OF INFILTRATION, REDISTRIBUTION AND DRAINAGE OF WATER IN A LAYERED SOIL

In order to study the effect of hysteresis on soil water movement a large soil column, filled with Glendale clay loam over a river sand, was flood-irrigated with 10 cm water. The infiltration rate, wetting front advance, water content redistribution, and the amount of drainage water was measured. A computer model, using S/360 CSMP, was developed to simulate the flow behavior. The main drying and main wetting curves in the soil water tension--water content, and in the hydraulic conductivity--water content relationships were provided in the computer model. From these relationships, scanning curves were developed to simulate hysteretic flow behavior under both wetting and drying conditions. Experimental data were compared with data computed from either the main drying, the main wetting, the scanning curves. Infiltration was accurately predicted using the main wetting curves. However, redistribution and drainage were better predicted when hysteresis was taken into account. /AUTHOR/

  • Corporate Authors:

    North-Holland Publishing Company

    P.O. Box 211
    1000 AE Amsterdam,   Netherlands 
  • Authors:
    • Dane, J H
    • Wierenga, P J
  • Publication Date: 1975-5

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00097621
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 29 1975 12:00AM