A STOCHASTIC-MODEL OF THE SOIL PORE-SPACE

A model based on a logarithmic pore size distribution with the propert ies of a Wiener random process, depending on the particle-size composi tion and density of the soil, is presented. Logarithmic distribution f unctions of the porosity distribution and the bulk infiltration coeffi cient are derived. The fractal dimension of the pore space is calculat ed from the variation in water retentivity or from the particle-size c omposition of the soil. A power-law equation relating the infiltration coefficient to the porosity of the soil is also derived.