Water Quality Models

The Environmental Fluid Dynamics Computer code (EFDC) can simulate water and water quality constituent transport in geometrically and dynamically complex water bodies, such as vertically mixed shallow estuaries, lakes, and coastal areas. The EFDC model solves the three-dimensional, vertically hydrostatic, free surface, turbulent averaged equations of motion for a variable density fluid. The model uses a stretched, or sigma, vertical coordinate and Cartesian, or curvilinear, orthogonal horizontal coordinates.

Delft3D by Deltares | Delft Hydraulics is a generic integrated 2D/3D modelling suite for flow, waves, morphology, water quality and ecology. The combined WAQ/ECO module has been coupled to Delft3D-FLOW, ROMS, TELEMAC and other circulation models; it includes a library of over 600 predefined processes that you can further extend with your own processes. The PART module allows for particle based modelling of e.g. oil spills.

The Center for Water Resources (CWR) model system ELCOM-CAEDYM couples the three-dimensional hydrodynamics model ELCOM with the aquatic ecological model CAEDYM. This allows for investigations into the spatial and temporal relationships between physical, biological and chemical variables in water bodies, over single events or seasonal to annual timescales.