GMS:SMS Package

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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
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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 Sparse Matrix Solver (SMS) Package is the solver used by MODFLOW-USG. The MODFLOW SMS Solver dialog has the following options:

  • Max head change between outer iterations (L)(HCLOSE)
  • Max head change between inner iterations (L)(HCLOSE)
  • Max number of outer nonlinear iterations for problem (MXITER)
  • Max number of inner linear iterations for problem (ITER1)
  • Print additional info to listing file (IPRSMS)
    • (0) print nothing
    • (1) print summary
    • (2) print detail
  • Nonlinear solution method (NONLINMETH)
    • (-2) Picard with Cooley
    • (-1) Picard with Delta-Bar-Delta
    • (0) Picard
    • (1) Newton with Delta-Bar-Delta
    • (2) Newton and Cooley
  • Linear matrix solver (LINMETH)
    • (1) χMD
    • (2) PCGU
    • (3) SAMG
  • Options (OPTIONS)
    • SPECIFIED
    • SIMPLE
    • MODERATE
    • COMPLEX
  • Linear acceleration method (CLIN)
  • Preconditioner (IPC)
  • Matrix scaling approach (ISCL)
  • Matrix reordering approach (IORD)
  • Convergence flow residual tolerance (L^3)(RCLOSEPCGU)

More information regarding inputs to the SMS package can be found in the MODFLOW-USG documentation at pubs.usgs.gov.

The SMS package, when used with GMS, also includes the option of using the SAMG or LMG within the SMS package. This option is selected under the Linear matrix solver (LINMETH) option in the MODFLOW SMS Solver dialog.

Example of the MODFLOW SMS Solver dialog.
v • e
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