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This article in SSSAJ

  1. Vol. 33 No. 5, p. 655-660
     
    Received: Jan 8, 1969
    Published: Sept, 1969


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doi:10.2136/sssaj1969.03615995003300050013x

The Prediction of Evaporation, Drainage, and Soil Water Storage for a Bare Soil1

  1. T. A. Black,
  2. W. R. Gardner and
  3. G. W. Thurtell2

Abstract

Abstract

Evaporation, drainage, and changes in storage for a bare Plainfield sand were measured with a lysimeter during June, July, and August 1967, under natural rainfall conditions. Cumulative evaporation at any stage was proportional to the square root of time following each heavy rainfall. The drainage rate was found to be an exponential function of water storage. Both relations can be predicted from flow theory with knowledge of soil capillary conductivity, diffusivity, and moisture retention characteristics. Using these two relations and daily rainfall data, the water storage in the top 150 cm was predicted over the season to within 0.3 cm.

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