USGS MOC
USGS MOC - 2-D Solute Transport Model
MOC is the USGS "Computer Model of Two-Dimensional Solute Transport and Dispersion in Ground Water" by L. F. Konikow and J. D. Bredehoeft.
- One- or two-dimensional problems involving steady state or transient flow.
- MOC computes changes in concentration over time caused by the processes of convective transport, hydrodynamic dispersion, and mixing from fluid sources.
- Aquifer may be heterogeneous and/or anisotropic.
- MOC is based on a rectangular, block-centered, finite-difference grid.
- MOC allows specification of injection or withdrawal wells and of spatially varying diffuse recharge or discharge, saturated thickness, transmissivity, boundary conditions, and initial heads and concentrations.
- MOC incorporates (1) first-order irreversible rate-reaction; (2) reversible equilibrium controlled sorption with linear, Freundlich, or Langmuir isotherms; and (3) reversible equilibrium-controlled ion exchange for monovalent or divalent ions.
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MOC - USGS 2-D Solute Transport Models
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