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- W2090403066 abstract "Abstract Many laboratory porous materials are considered to have a zone of tension‐saturation in their water retentivity curve near saturation. This implies that the soil water diffusivity, D , is infinite in such a region. Here three new methods of measuring the diffusivity near saturation are presented. Experiments were carried out on a fine sand and all methods found D to be finite, yet large, having a value of approximately 1 to 2 × 10 −3 m 2 s −1 . Since the near‐saturated conductivity of the sand is of the order 10 −5 m s −1 this implies that the water retentivity curve near saturation has a finite but large slope of order 10 2 m. This was compatible with the measured retentivity data. The theory of one‐dimensional absorption implies that the slope of the Boltzmann variable with respect to volumetric water content near saturation equals twice D divided by the sorptivity. The slope calculated this way was compatible with that found in absorption experiments." @default.
- W2090403066 created "2016-06-24" @default.
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- W2090403066 date "1983-07-01" @default.
- W2090403066 modified "2023-09-28" @default.
- W2090403066 title "The Soil Water Diffusivity Near Saturation" @default.
- W2090403066 doi "https://doi.org/10.2136/sssaj1983.03615995004700040005x" @default.
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