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Modeling the soul surface seal from a filtration perspective

Somaratne, N.M. and Smettem, K.R.J. (1998) Modeling the soul surface seal from a filtration perspective. Agricultural Sciences, 3 (1). pp. 9-18.

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Abstract

A physically based model of soil surface scaling is proposed. The governing equations are formulated on the principle of conservation of mass assuming Darcy's law applies to suspension flowing through the soil surface. The model incorporates the physics of surface sealing by mechanisms that capture suspended particles moving with infiltrating water. As a result of particle retention in the soil system, the intrinsic porosity is reduced and hulk density is increased, resulting in changes to soil hydraulic properties such as moisture retention and hydraulic conductivity. Empirical functions are developed to describe the changes of these properties as the seal develops. With this approach, the seal can be mathematically described by well defined initial and boundary conditions and transient seal properties can be simulated in a physically realistic manner.

Publication Type: Journal Article
Copyright: © Sultan Qaboos University
URI: http://researchrepository.murdoch.edu.au/id/eprint/38136
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