WASP
Gov-Public
EPA's Water Quality Analysis Simulation Program — eutrophication, toxics and sediment in rivers and estuaries.
EFDC+
ActiveOpen-source 3D hydrodynamics and water quality — the EFDC lineage modernised, with a commercial GUI option.
by DSI LLC
- Pricing
- Freemium
- License
- GPL-3.0 (engine); proprietary GUI
- Commercial use
- Permitted
- Ecosystem
- Fortran
- Platform
- Windows, Linux
About EFDC+
EFDC+ is DSI's actively developed, open-source continuation of the EPA's Environmental Fluid Dynamics Code: 3D hydrodynamics, salinity and temperature, sediment transport, toxics and full eutrophication kinetics for rivers, lakes, estuaries and coastal seas, with modern additions (sigma-zed vertical grids, OpenMP/MPI performance, hydrokinetic devices).
The engine is free and open on GitHub; DSI sells EFDC_Explorer, the GUI that most practitioners use to build and visualise models. That combination — open regulatory-lineage engine, paid productivity layer — makes EFDC+ the most accessible full 3D water-quality stack going.
Where it fits in the workflow
TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting
Alternatives to EFDC+
Ranked by the topics, categories and workflow stages they share with EFDC+.
Delft3D FM
Open Source
Deltares' open flexible-mesh suite for rivers, estuaries and coasts — hydrodynamics to morphology.
SWAT+
Open Source
The USDA watershed model for land use, sediment and nutrients — continuous simulation at catchment scale.
PHREEQC
Gov-Public
USGS geochemical modelling — speciation, batch reactions, 1D reactive transport and inverse modelling.
Visual MODFLOW Flex
Commercial
3D groundwater flow and transport modeling environment for MODFLOW, SEAWAT, and PEST calibration workflows.
openTELEMAC
Open Source
EDF's open-source finite-element suite for free-surface flow — 2D/3D rivers, estuaries, waves and sediment.