GWT-FMI

Structure of Blocks

FOR EACH SIMULATION

    BEGIN OPTIONS
      [SAVE_FLOWS]
      [FLOW_IMBALANCE_CORRECTION]
    END OPTIONS

    BEGIN PACKAGEDATA
      <flowtype> FILEIN <fname>
      <flowtype> FILEIN <fname>
      ...
    END PACKAGEDATA

Explanation of Variables

Block: OPTIONS

  • SAVE_FLOWS keyword to indicate that FMI flow terms will be written to the file specified with “BUDGET FILEOUT” in Output Control.

  • FLOW_IMBALANCE_CORRECTION correct for an imbalance in flows by assuming that any residual flow error comes in or leaves at the concentration of the cell. When this option is activated, the GWT Model budget written to the listing file will contain two additional entries: FLOW-ERROR and FLOW-CORRECTION. These two entries will be equal but opposite in sign. The FLOW-CORRECTION term is a mass flow that is added to offset the error caused by an imprecise flow balance. If these terms are not relatively small, the flow model should be rerun with stricter convergence tolerances.

Block: PACKAGEDATA

  • flowtype is the word GWFBUDGET, GWFHEAD, GWFMOVER or the name of an advanced GWF stress package. If GWFBUDGET is specified, then the corresponding file must be a budget file from a previous GWF Model run. If an advanced GWF stress package name appears then the corresponding file must be the budget file saved by a LAK, SFR, MAW or UZF Package.

  • FILEIN keyword to specify that an input filename is expected next.

  • fname is the name of the file containing flows. The path to the file should be included if the file is not located in the folder where the program was run.

Example Input File

    BEGIN OPTIONS
      FLOW_IMBALANCE_CORRECTION
    END OPTIONS
    
    BEGIN PACKAGEDATA
      GWFBUDGET FILEIN ../flow/mygwfmodel.bud
      GWFHEAD FILEIN   ../flow/mygwfmodel.hds
      GWFMOVER FILEIN  ../flow/mygwfmodel.mvr.bud
      LAK-1 FILEIN     ../flow/mygwfmodel.lak.bud
      SFR-1 FILEIN     ../flow/mygwfmodel.sfr.bud
      MAW-1 FILEIN     ../flow/mygwfmodel.maw.bud
      UZF-1 FILEIN     ../flow/mygwfmodel.uzf.bud
      LAK-2 FILEIN     ../flow/mygwfmodel-2.lak.bud
    END PACKAGEDATA