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.path		Traces paths from starting points following input directions.
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.

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