GRASS GIS 7.4.5dev Reference Manual: Topic hydrology

Note: A new GRASS GIS stable version has been released: GRASS GIS 7.8, available here.
Updated manual page: here

Topic: hydrology

r.basins.fill	Generates watershed subbasins raster map.
r.carve	Generates stream channels.
r.drain	Traces a flow through an elevation model or cost surface on a raster map.
r.fill.dir	Filters and generates a depressionless elevation map and a flow direction map from a given elevation raster map.
r.flow	Constructs flowlines.
r.lake	Fills lake at given point to given level.
r.sim.sediment	Sediment transport and erosion/deposition simulation using path sampling method (SIMWE).
r.sim.water	Overland flow hydrologic simulation using path sampling method (SIMWE).
r.solute.transport	Numerical calculation program for transient, confined and unconfined solute transport in two dimensions
r.stream.extract	Performs stream network extraction.
r.terraflow	Performs flow computation for massive grids.
r.topidx	Creates a topographic index (wetness index) raster map from an elevation raster map.
r.topmodel	Simulates TOPMODEL which is a physically based hydrologic model.
r.uslek	Computes USLE Soil Erodibility Factor (K).
r.usler	Computes USLE R factor, Rainfall erosivity index.
r.water.outlet	Creates watershed basins from a drainage direction map.
r.watershed	Calculates hydrological parameters and RUSLE factors.
r3.flow	Computes 3D flow lines and 3D flow accumulation.

See also the corresponding keyword hydrology for additional references.

Note: A new GRASS GIS stable version has been released: GRASS GIS 7.8, available here.
Updated manual page: here