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 groundwater 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 
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