Permeability Function for Unsaturated Soil

Drying and wetting permeability function, Fredlund et al 2012

Typical relationship between SWCC and permeability function, Fredlund et al 2012

Water coefficient of permeability in unsaturated soil is a function of pore-water pressure or water content. Direct measurement of permeability in the laboratory can be time-consuming, especially for low water content conditions. Indirect measurements of permeability are commonly performed by establishing permeability functions through the use of the relationship between water content and pore-water pressure (i.e. soil-water characteristic curve). In general, various permeability functions can be classified into three groups: empirical, macroscopic and statistical models.

References

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