Green and Ampt infiltration into soils of variable pore size with depth Public Deposited

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  • Most expressions for infiltration rely upon the assumption of vertical uniformity in soil texture and hydraulic properties. We present an extension of the results of Beven [1982, 1984] for infiltration and lateral flow in soils with decreasing permeability with depth. Unlike Beven, we base the derivations upon joint changes in soil properties based on an overall change in characteristic pore size via Miller scaling. A set of very simple expressions for the time rate of infiltration are obtained using a Green and Ampt approach for soils with permeability that decreases with depth following linear, power law, and exponential relationships.
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  • Selker, J. S., J. Duan, and J.-Y. Parlange (1999), Green and Ampt infiltration into soils of variable pore size with depth, Water Resources Research, 35(5), 1685–1688, doi:10.1029/1999WR900008.
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