BASEMENT
Free
ETH Zurich's free 2D hydraulics and morphodynamics simulator — rivers, sediment and hazard mapping.
Hydraulics & River SystemsActive2D Hydraulic ModellingSediment Transport
QGIS plugins for water engineering
7 tools in the directory — every listing curated and classified by hand.
Crayfish
Open Source
QGIS plugin for exploring mesh model results — animate TUFLOW, Telemac and HEC-RAS 2D outputs in the GIS.
Geospatial & Hydro-GISStableQGIS HydrologyFlood Mapping
Generate SWMM inp (QGIS plugin)
Open Source
Build and read EPA SWMM models as QGIS layers — free GIS-based SWMM model construction.
Urban Stormwater & InfrastructureActiveSWMMQGIS Hydrology
QGISRed
Open Source
A QGIS plugin that turns the free GIS into a water-network modelling environment for EPANET.
Water Distribution & QualityActiveEPANETQGIS Hydrology
QSWAT+
Open Source
The QGIS interface for SWAT+ — delineate, discretise and build a watershed model without leaving the GIS.
Geospatial & Hydro-GISActiveQGIS Watershed DelineationQGIS Hydrology
WhiteboxTools
Open SourceVerified
500+ fast geospatial analysis tools with the best DEM hydrology toolkit in open source.
Geospatial & Hydro-GISActiveDEM ProcessingTerrain Analysis
pyromb
Open Source
Build RORB, WBNM and URBS model files straight from GIS shapefiles — with companion QGIS plugins.
Hydrology & Catchment AnalysisActiveFlood RoutingQGIS Hydrology