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This article in SSSAJ

  1. Vol. 40 No. 5, p. 777-779
    Received: Aug 18, 1975
    Accepted: Mar 22, 1976

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Predicting Runoff Initiation Times Under Field Conditions in Tropical (Hawaii) Soils1

  1. L. R. Ahuja,
  2. E. W. Dangler and
  3. S. A. El-Swaify2



Runoff initiation times measured during field rain-simulation studies on 10 important Hawaii soils are examined in relation to antecedent soil-water status. The experimental data show considerable scatter due mainly to natural soil variability within a soil series. However, the data exhibited a fairly proportional relationship between runoff initiation time and antecedent soil saturation deficit (final minus initial soil-water content), in accordance with a simple Green-Ampt type equation. The results indicate a potential method for estimating erosive portions of rainstorms and subsequent soil loss hazards in relation to varying antecedent soil-water contents during different seasons of the year.

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