AQUATOX
Gov-Public
EPA's aquatic ecosystem model — fate and ecological effects of nutrients, toxics and stressors together.
Water Quality & EnvironmentalDormantWater Quality Modelling
WASP
ActiveEPA's Water Quality Analysis Simulation Program — eutrophication, toxics and sediment in rivers and estuaries.
by US EPA
- Pricing
- Gov-Public
- License
- US Government (public domain)
- Commercial use
- Permitted
- Ecosystem
- Standalone, EFDC, HSPF
- Platform
- Windows
About WASP
WASP (Water Quality Analysis Simulation Program) is the EPA's general-purpose surface-water quality framework, simulating eutrophication, organic toxics, metals, mercury, pathogens and sediment across 1D, 2D and 3D segmentations of rivers, lakes and estuaries. It links to hydrodynamic drivers (EFDC, DYNHYD) and watershed loads (HSPF, SWAT, LSPC).
Decades of TMDL and regulatory studies run on WASP, and EPA still maintains and trains on it. When a US water-quality study needs an agency-recognised mechanistic model with more dimensionality than QUAL2K, WASP is the standing answer.
Where it fits in the workflow
TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting
Alternatives to WASP
Other water quality & environmental tools covering similar workflow stages.
BASINS
Gov-Public
EPA's watershed assessment suite — HSPF continuous watershed-quality modelling with GIS and data access built in.
Water Quality & EnvironmentalDormantWater Quality ModellingWatershed Delineation
CE-QUAL-W2
Free
The standard 2D reservoir and stratified-river water-quality model — temperature, DO and eutrophication.
Water Quality & EnvironmentalActiveWater Quality ModellingReservoir Operations
EFDC+
Freemium
Open-source 3D hydrodynamics and water quality — the EFDC lineage modernised, with a commercial GUI option.
Water Quality & EnvironmentalActiveWater Quality ModellingCoastal Modelling
EGRET
Open Source
USGS R package for long-term water-quality and streamflow trends — home of the WRTDS method.
Water Quality & EnvironmentalActiveWater Quality ModellingR Hydrology
QUAL2K
Free
The classic river water-quality model — DO, nutrients and algae along a 1D stream network.
Water Quality & EnvironmentalDormantWater Quality Modelling