r.carve
r.carve - Takes vector stream data, transforms it to raster and subtracts depth from the output DEM.
Raster (r.*)
ParameterRaster|rast|Name of input raster elevation map|False
ParameterVector|vect|Name of vector input map containing stream(s)|1|False
ParameterNumber|width|Stream width (in meters). Default is raster cell width|None|None|1
ParameterNumber|depth|Additional stream depth (in meters)|None|None|1
ParameterBoolean|-n|No flat areas allowed in flow direction|False
OutputRaster|output|Name for output raster map
OutputVector|points|Name for output vector map for adjusted stream points