Influence of Variations in the Diffusivity‐Water Content Relation on Infiltration

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Abstract
Estimates of the influence of variations in the diffusivity (or conductivity)‐water content relation on infiltration were made using a numerical method. Where the diffusivity was increased or decreased up to a factor of two at saturation, infiltration was markedly changed. However, variations of the diffusivity by a factor of 100 at drier moisture contents had no significant influence on infiltration. This implies that infiltration is governed, to a large extent, by the soil properties at water contents near saturation and is little influenced by soil properties at drier water contents.

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