Pset_InSituTestHydro Properties for the results of in-situ pumping tests in soil or rock. IfcGeoScienceObservation/INSITUTESTRESULT IfcGeoScienceObservation/INSITUTESTRESULT HydraulicPermeability A measurement of the ability of a fluid to flow through a rock. Represented by the variable "k". The quality of the soil that enables water to move through the profile. Permeability is measured as the number of metres per sec that water moves through the saturated soil. HydraulicConductivity Hydraulic Conductivity (permeability) of soil for water, given with the K or Kf value in m/s Transmissivity Rate of flow of groundwater under a unit hydraulic gradient through an aquifer of unit width and unit thickness. That is, transmissivity is the product of hydraulic conductivity and thickness of the aquifer. The unit is in m2/second. Storativity Volume of water released from storage per unit surface area of a confined aquifer per unit decline in hydraulic head. It is dimensionless. LugeonValue Lugeon Value = (q / L) x (P0 / P), where: - q: flow rate [lit/min] - L: Length of the borehole test interval [m] - P0: reference pressure of 1 MPa [MPa] - P: Test pressure [MPa]