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For more info on the GMG solver look at the following document:  
For more info on the GMG solver look at the following document:  


MODFLOW-2000, THE U.S. GEOLOGICAL SURVEY MODULAR GROUND-WATER MODEL -- GMG LINEAR EQUATION SOLVER PACKAGE DOCUMENTATION
MODFLOW-2000, The U.S. Geological Survey Modular Ground-Water Model – GMG Linear Equation Solver Package Documentation


By: J. D. Wilson, NRC Post-Doc, and R. L. Naff, U.S. Geological Survey [http://pubs.usgs.gov/of/2004/1261/]
By: J. D. Wilson, NRC Post-Doc, and R. L. Naff, U.S. Geological Survey [http://pubs.usgs.gov/of/2004/1261/]

Revision as of 18:36, 5 July 2016

MODFLOW
Pre-processing
MODFLOW Commands
Building a MODFLOW Model
Map to MODFLOW
Calibration
Packages Supported in GMS
Saving a MODFLOW Simulation
Importing MODFLOW Files
Unsupported MODFLOW Features
Run MODFLOW
Post-processing
MODFLOW Display Options
MODFLOW Post-Processing Viewing Options
Reading a MODFLOW Simulation
Tutorials
Packages
Flow: BCF6, HUF, LPF, UPW
Solvers:

DE4, GMG, NWT, PCG,

PCGN, LMG, SIP, SOR,

SMS
Other:

BAS6, BFH, CHD1, CLN,

DRN1, DRT1, EVT1, ETS1,

GAGE, GHB1, GNC, HFB1,

HUF, LAK3, MNW1, MNW2,

OUT1, RCH1, RIV1, SFR2,

STR1, SUB1, SWI2, WEL1,

UZF1
v • e

The GMG package is one of the solver packages for MODFLOW supported by GMS. The GMG solver is an iterative solver based on a multi-grid approach.

Parameters include:

  • Inner convergence residual (RCLOSE)
  • Maximum inner iterations (IITER)
  • Outer convergence residual (HCLOSE)
  • Maximum outer iterations (MAXITER) – Also referred to as MXITER.
  • Damping parameter (DAMP)
  • Damping option (IADAMP)
  • Maximum damping (DUP)
  • Minimum damping (DLOW)
  • Maximum head change (CHGLIMIT)
  • Output flag (IOUTGMG)
  • Maximum head output (IUNITMHC)
  • Multi-grid preconditioner smoothing (ISM)
  • Multi-grid preconditioner coarsening (ISC)
  • Relocation parameter (RELAX)

For more info on the GMG solver look at the following document:

MODFLOW-2000, The U.S. Geological Survey Modular Ground-Water Model – GMG Linear Equation Solver Package Documentation

By: J. D. Wilson, NRC Post-Doc, and R. L. Naff, U.S. Geological Survey [1]

The MODFLOW GMG Solver package dialog.


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