GGSD Program Details for MOCDENSE

MOCDENSE

Category	Contaminant transport (2D FD)
Publisher	US Geological Survey
Platform	DOS, UNIX, DG, SGI, Sun
Status	Public domain
Description	MOCDENSE simulates solute transport in flowing ground water. It is applicable to 2D, cross sectional problems involving ground water with constant or variable density. The model computes changes in concentration over time caused by the processes of advective transport, hydrodynamic dispersion, mixing or dilution from fluid sources. The concentrations of two independent solutes can be modeled simultaneously. Temperature is assumed to be constant, but fluid density and viscosity are assumed to be a linear function of the first specified solute. If a second solute is specified, it is assumed to be of a trace amount such that it does not affect the fluid density or viscosity. The aquifer may be heterogeneous and anisotropic. The model has been used mostly in studies of either saltwater intrusion or dense contaminant plumes. The model couples the ground-water flow equation with the solute transport equation. The program uses an iterative strongly implicit procedure to solve a finite difference approximation to the groundwater flow equation. The model uses the method of characteristics to solve the solute transport equation. This incorporates a particle tracking procedure to represent advective transport and a two step explicit finite difference procedure to solve equations that describe the effects of hydrodynamic dispersion and fluid sources. This explicit procedure has several stability criteria associated with it, but the consequent time step limitations are automatically determined by the program.
Cost	Free on WWW
Data formats supported	None stated
Supplier in United States of America	International Ground Water Modeling Center
Supplier in United States of America	Scientific Software Group
Supplier in United States of America	US Geological Survey