MODFLOW-SURFACT

MODFLOW-SURFACT
  • Accurate delineation and tracking of water table position, taking into account flow in the unsaturated zone, delayed yield, and vertical flow components
  • Complex saturated/unsaturated flow and transport processes
  • Robust solvers and revised simulation ability

 

Overview

MODFLOW-SURFACT Flow is groundwater modeling software used to produce 3D finite-difference groundwater flow and transport models. This groundwater simulation software features many robust methods and enhanced simulation capabilities for handling complex saturated/unsaturated subsurface flow and transport processes. Based on the USGS modular groundwater flow model, MODFLOW.

Benefits

  • Handles complete desaturation and resaturation of grid cells
  • Accurate delineation and tracking of water table position, taking into account flow in the unsaturated zone, delayed yield, and vertical flow components
  • Automatic and correct redistribution of the total flow rate of a well screened through multiple model layers when the upper cell(s) are pumped dry
  • Accommodation of wellbore storage and overpumped wells
  • Prevents water table buildup beyond a specified recharge-ponding elevation
  • Handling of seepage face boundary conditions
  • Adaptive time-stepping schemes automatically adjusts time-step size to the non-linearities of the system to optimize the solution stability
  • Robust and efficient Pre-conditioned Conjugate Gradient matrix solver
  • Capability of modeling unsaturated water or air movement
  • Enhanced Newton-Raphson linearization option increases robustness for unconfined and/or unsaturated flow conditions
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MODFLOW-SURFACT Flow

  • New flow package (BCF4)
  • New recharge/seepage** face package (RSF4)
  • New Adaptive Time Stepping and Output Control Package (ATO4)
  • New Preconditioned Conjugate Gradient Package containing a new PCG matrix solver (PCG4)
  • New Newton Raphson linearization package with backtracking (NRB1)
  • Simulate complete desaturation and saturation of grid blocks
  • Simulate unsaturated flow
  • Includes vapor flow
modflow-surfact-flow
modflow-surfact-flow

MODFLOW-SURFACT Transport

  • Includes fracture well package (FWL4), new flow package (BCF4), recharge/seepage** face package (RSF4)
  • Includes new Adaptive Time Stepping and Output Control Package (ATO4)
    Includes new Preconditioned Conjugate Gradient Package containing a new PCG matrix solver (PCG4)
  • Includes new Newton Raphson linearization package with backtracking (NRB1)
  • Simulate complete desaturation and saturation of grid blocks
  • Simulate unsaturated flow includes fractured flow and dual porosity
  • Includes solute transport, multiphase transport, NAPL dissolution and volatilization
  • Includes vapor flow
  • Accurate delineation and tracking of water table position, taking into account flow in the unsaturated zone, delayed yield, and vertical flow components
  • Automatic and correct redistribution of the total flow rate of a well screened through multiple model layers when the upper cell(s) are pumped dry
  • Accommodation of wellbore storage and overpumped wells
  • Prevents water table buildup beyond a specified recharge-ponding elevation
  • Handling of seepage face boundary conditions
  • Adaptive time-stepping schemes automatically adjusts time-step size to the non-linearities of the system to optimize the solution stability
  • Robust and efficient Pre-conditioned Conjugate Gradient matrix solver
modflow-surfact-transport
modflow-surfact-transport
modflow-surfact-transport

System Requirements

  • Pentium CPU 1 GHz
  • 1 GB RAM