The table below compares the features and capabilities of EFDC_DS with three other internationally used hydrodynamic modeling systems currently on the market. Note that while the EFDC source code is public domain, EFDC_Explorer pre- and post-processing software is licensed and may, or may not be free of charge, depending on the version used.

Item		EFDC_DSI	UNTRIM	DELFT3D	MIKE 3
Major Features
	Open source
	Cost per license	Single threaded version free	Fee based	User Interface requires Annual Fee	Fee based
	Numerical method	Explicit (FDM)	Semi-Implicit (FDM,FVM)	Implicit (FEM,FVM)	Implicit (FEM,FVM)
	Horizontal coordinates system	Curvilinear	Cartesian (X,Y,Z)	Curvilinear	Curvilinear
	Vertical coordinates system	Sigma	Z-grid	Sigma	Sigma
	Grid type	Structured	Unstructured	Structured	Unstructured
	Multithreading capability	Optional
Reynolds-Averaged Navier-Stokes equations
	Local acceleration (inertia)
	Advective acceleration
	Coriolis acceleration
	Barotropic pressure gradient
	Non-hydrostatic pressure
	Horizontal turbulent viscosity
	Vertical turbulent viscosity
	Bottom friction
	Wind friction
Wave Effects
	Wave propagation
	Wind wave generation
Tracers
	Conservative
	Non-conservative
Sediments
	Cohesive
	Non-cohesive
	Multiple grain sizes
	Erosion formulation options
	Bed morphology		(SediMorph)
Toxics
	Particle based
	Organic carbon partitioning; 1,2 or 3 phase
Water Quality
	Full Entrophication submodel (3 algal classes)
	Full sediment diagenesis
	Submerged aquatic vegetation analysis
	Full Eutrophication submodel (3 algal classes)
Lagrangian Particle Tracking
	Oil spill tracks
	Emergency response
	Water quality applications
	Plume tracking
Boundary Condition Types
	Flow
	Open
	Hydraulic structures
	Jet/Plume (Near field/far field)
	Withdrawal/Return