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Infiltration Through Reconstructed Surface Mined Spoils and Soils

Transactions of the ASAE, Vol: 26, Issue: 3, Page: 0821-0830
1983
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Article Description

An extensive series of tests involving reconstructed profiles of spoil and topsoil material from a Western Kentucky surface mine site was conducted with a laboratory infiltrometer system. Infiltration through the reconstructed spoil profiles was very slow despite the coarse nature of the material. Low infiltration rates could be attributed to the material having a well-graded texture and to the high densities of the profiles. Infiltration through topsoil horizons was controlled, for the most part, by conditions at the surface. Following wetting, infiltration rates were primarily controlled by the hydraulic characteristics of the less permeable sub horizon of the spoil material. Except in very early stages, rainfall rate had little effect upon infiltration rate (or volume) through the spoil and topsoil profiles. Infiltration was, however, significantly influenced by initial moisture content and density.

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