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Soil Science Society of America Journal Abstract -

The Calibration of the Richards Flow Equation for a Draining Column by Parameter Identification1


This article in SSSAJ

  1. Vol. 45 No. 6, p. 1012-1015
    Received: Oct 23, 1980
    Accepted: July 16, 1981

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  1. D. W. Zachmann,
  2. P. C. DuChateau and
  3. A. Klute2



Before the Richards equation can be used to simulate the flow of moisture through a soil it is necessary to estimate the water capacity and hydraulic conductivity functions which appear as coefficients. We present four parameter identification methods and one direct method for estimating these hydraulic properties. For the sample problem considered, the parameter identification method which used cumulative discharge data to estimate water capacity and hydraulic conductivity performed the best in predicting water content as a function of depth and time during drainage.

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