permeability, intrinsic

   1. A measure of the ability of a medium to transmit a fluid through a porous medium. It is a function of the medium only and is proportional to the mean grain size diameter.
   2. A measure of the relative ease with which a porous medium can transmit a fluid under a potential gradient and is a property of the medium alone [22].
   3. The property of a porous medium itself that expresses the ease with which gases, liquids, or other substances can pass through it [22].

A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. . 2002.

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