FRACTAL CHARACTERISTICS OF THE HORIZONTAL MOVEMENT OF WATER IN SOILS
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Data
1994-09-01
Autores
Guerrini, Ivan A. [UNESP]
Swartzendruber, D.
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World Scientific Publ Co Pte Ltd
Resumo
Observed deviations from traditional concepts of soil-water movement are considered in terms of fractals. A connection is made between this movement and a Brownian motion, a random and self-affine type of fractal, to account for the soil-water diffusivity function having auxiliary time dependence for unsaturated soils. The position of a given water content is directly proportional to t(n), where t is time, and exponent n for distinctly unsaturated soil is less than the traditional 0.50. As water saturation is approached, n approaches 0.50. Macroscopic fractional Brownian motion is associated with n < 0.50, but shifts to regular Brownian motion for n = 0.50.
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Fractals-complex Geometry Patterns and Scaling In Nature and Society. Singapore: World Scientific Publ Co Pte Ltd, v. 2, n. 3, p. 465-468, 1994.