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This article in SSSAJ

  1. Vol. 46 No. 4, p. 836-840
     
    Received: Nov 3, 1981


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doi:10.2136/sssaj1982.03615995004600040034x

Parameters for Describing Soil Detachment Due to Single Waterdrop Impact1

  1. M. M. Al-Durrah and
  2. J. M. Bradford2

Abstract

Abstract

A simple relationship that predicts soil detachment due to single raindrop impact was tested for nine soils and three drop sizes. This relationship expressed splash weight as a linear function of the ratio of raindrop kinetic energy to soil resistance expressed as the undrained shear strength. The coefficient of determination values between splash weight and the force-resistance ratio for individual soils were high (r2 = 0.88 to 0.97); however, the coefficient of determination among all soils was lower (r2 = 0.81). This was due to differences among soils in the slope of the regression line and to uncertainties associated with the calibration of the fall-cone penetration apparatus. The slope was highly correlated with percent clay, organic matter, surface area, exchangeable sodium, and the amount of soluble salts. A maximum coefficient of determination of 0.61 was found when soil properties other than shear strength were used as independent variables to predict soil splash.

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