# iMOD User Manual version 5.2 (html)

#### 12.20RIV River package

The river package defines the location, the water level (L), the bottom level (L), the conductance (L${}^{2}$/T) and the infiltration factor (-) by four IDFs. The river package represents the presence of permanent water from which water may infiltrate or to which water may discharge. The source of water in the river package is unlimited which means that rivers never dry out. The RIV package is comparable to the RIV package of MODFLOW, except for the infiltration factor which is added in iMODFLOW.

The RIV package may be replaced by the ISG package which defines the surface water in segments.