# iMOD User Manual version 5.2 (html)

#### 12.5VCW Vertical resistances

The vertical resistance (T) of each modellayer is defined by one IDF (or a constant value). Alternatively the vertical resistance of a model layer may be defined indirectly by the layer thicknesses derived from the TOP and BOT package, the vertical permeability defined in the KVV package, the horizontal permeability defined in the KHV package and the vertical anisotropy defined in the KVA package (see figure 12.3). The VCW vertical resistance corresponds with the reciprocal of the VCONT variable specified in the MODFLOW BCF package, so $VCW=\frac {1}{VCONT}$.