Contaminant Transport Modelling Tools

Open-source 3D hydrodynamics and water quality — the EFDC lineage modernised, with a commercial GUI option.

Multi-species water quality for EPANET — model chloramine decay, DBPs and reactive chemistry in networks.

DHI's finite-element groundwater platform — unstructured meshes, density-driven flow, heat and mine dewatering.

The standard for vadose-zone modelling — variably saturated flow and transport by Richards' equation.

The USGS groundwater model — the world standard for aquifer simulation, rebuilt as a modular multi-model framework.

USGS particle tracking for MODFLOW — pathlines, travel times and capture zones from flow solutions.

Multi-species solute transport for MODFLOW — advection, dispersion, sorption and reactions in aquifers.

USGS geochemical modelling — speciation, batch reactions, 1D reactive transport and inverse modelling.

EPA's Water Quality Analysis Simulation Program — eutrophication, toxics and sediment in rivers and estuaries.