A factor taking into account the influence of the gas overpressure (difference of the gas pressure and the threshold pressure) on the permeability.

Additional info

From MaterialLib/MPL/Properties/CreateGasPressureDependentPermeability.cpp line 60

• This is a required parameter.
• Data type: double
• Expanded tag path: NONEXISTENT.property.GasPressureDependentPermeability.a2
• Go to source code: → ogs/ogs/master

Used in the following test data files

Used in no end-to-end test cases.