r.lake
r.lake.layer - Fills lake at given point to given level.
Raster (r.*)
ParameterRaster|dem|Name of terrain raster map (DEM)|False
ParameterString|wl|Water level|
ParameterRaster|seed|Name of raster map with given starting point(s) (at least 1 cell > 0)|False
ParameterBoolean|-n|Use negative depth values for lake raster map|False
OutputRaster|lake|Name for output raster map with lake