# River (RIV) package¶

The RIV package specifies the contribution or drainage of the rivers to/from the aquifer. To enable the river package use

mf.setRiver(head, bottom, conductance, LAYER)


where

head [$$L$$]

is the name of a spatial, scalar PCRaster map containing the head values;

bottom [$$L$$]

is the name of a spatial, scalar PCRaster map containing bottom values;

conductance [$$L^2T^-1$$]

is the name of a spatial, scalar PCRaster map containing the conductance values. The cell values must contain either 0 (no river) or the conductance value of the corresponding river cell;

LAYER [$$-$$]

is the layer number the map values will be assigned to.