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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© 2003-2019 GRASS Development Team, GRASS GIS 7.8.1dev Reference Manual