# iMOD User Manual version 5.2 (html)

#### 12.6KHV Horizontal permeabilities

The horizontal permeability (L/T) of each modellayer is defined by one IDF (or a constant value). The horizontal permeability is used in combination with the layer thickness to calculate the transmissivity of a modellayer (see figure 12.3). The KHV horizontal permeability corresponds with the HY variable specified in the MODFLOW BCF package and the HK variable specified in the MODFLOW LPF package.