Resources & Systems International, Inc.Watershed Planning • Resources Management • Environmental Solutions • Ecological Risk Assessment
Resources & Systems International, Inc.
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MARS - The Remediation Simulator
MARS is a multiphase areal remediation simulator to model coupled areal flow of water and light nonaqueous phase liquid (LNAPL). When used with BIOF&T -- aqueous phase transport of up to five species in groundwater can also be simulated. MARS can be used to simulate recovery and migration of LNAPL and groundwater cleanup in heterogeneous and/or anisotropic fractured or porous media.
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 | Initial conditions and free oil volume are estimated internally from the monitoring well fluid level data. |
| Rectangular 2-D/3-D prism or isoparametric quadrilateral/hexahedral elements to accurately model irregular domain and material boundaries, hydraulic, and physical boundaries. |
| Oil and water recovery rates are computed. |
| Areal distribution of residual hydrocarbon is computed and used to estimate transient contaminant loading to groundwater. |
| Interactive finite element mesh generator: rectangular/isoparametric quadrilateral mesh for areal simulations, and rectangular 3-D prism or isoparametric hexahedral mesh for 3-D problems. |
| Spatially variable water recharge, injection or LNAPL leakage. |
| Model multiple pumping and/or injection wells. |
| Model specified head, flux and source/sink boundary conditions. |
| Simulates fractured media or granular porous media based on dual porosity approach. |
When used with BIOF&T, it allows:
| Transient 2-D or 3-D multicomponent aqueous phase transport in groundwater aquifers. This feature enables computationally efficient simulations with a model that gives due regard to the dimensionality of the problem and is hydrogeologically defensible. |
| Temporal and spatial variations in the source (i.e., residual dense or light nonaqueous phase liquids), and, given the initial conditions, changes in loading to groundwater are computed and updated internally for aqueous phase transport. |
| Model specified concentration, mass flux and source/sink boundary conditions. |
| Convection, dispersion, diffusion, adsorption, desorption, and microbial processes based on oxygen limited, first order, or Monod type biodegradation kinetics, as well as anaerobic sequential degradation involving multiple daughter products. |
| Computationally efficient matrix solution by conjugate gradient method with preconditioning. |
