QGIS
Open SourceVerified
The free, open-source GIS that has become the default spatial platform for water engineers worldwide.
5 tools · Collection
QGIS Tools for Catchment Delineation
Catchment delineation in QGIS has gone from a painful chain of processing steps to a genuinely pleasant workflow — if you know which tools to reach for. This collection covers the delineation stack we recommend: WhiteboxTools for DEM conditioning and fast delineation, SAGA and GRASS providers for terrain derivatives and r.watershed, and QSWAT+ when the delineation is the front end of a full watershed model.
Filters
WhiteboxTools
Open SourceVerified
500+ fast geospatial analysis tools with the best DEM hydrology toolkit in open source.
SAGA GIS
Open Source
The geomorphometry powerhouse — hundreds of terrain and hydrology modules behind a free desktop GIS.
GRASS GIS
Open Source
Four decades of geospatial engineering — r.watershed and the most battle-tested hydrology modules in GIS.
QSWAT+
Open Source
The QGIS interface for SWAT+ — delineate, discretise and build a watershed model without leaving the GIS.