Sorptivity

Sorptivity

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John Philip
John Philip
John Philip may refer to:*John R. Philip, Australian physicist*John Woodward Philip, American admiral-See also:*John Phillip , artist*John Philips, poet*John Phillips...

 (1957) described sorptivity as a measure of the capacity of the medium to absorb or desorb liquid by capillarity.
Calculation of the true sorptivity required numerical iterative procedures dependent on soil water content and diffusivity.
John Philip
John Philip
John Philip may refer to:*John R. Philip, Australian physicist*John Woodward Philip, American admiral-See also:*John Phillip , artist*John Philips, poet*John Phillips...

(1969) showed that sorptivity can be determined from horizontal infiltration where water flow is mostly controlled by capillary absorption:



where S is sorptivity, I is the cumulative infiltration at time, t.

For vertical infiltration, Philip's solution is adated using a parameter A1. This results in the following equations, which are valid for short times:
cumulative: , rate where the sorptivity S is defined (when a sharp wetting front Lf exists, as: