User:Jcreer/GMS 99.99 Changes: Difference between revisions

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|BULK_DENSITY
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|BCT
|ADSORB
|MST
|DISTCOEF
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|MDT
|MDFLAG
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|MD_TYPE_FLAG
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|VOLFRACMD
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|MD_FRACTION
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|PORMD
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|MD_POROSITY
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|RHOBMD
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|BULD_DENSITY
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|DIFFLENMD
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|MD_DIFF_LENGTH
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|TORTMD
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|MD_TORTUOSITY
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Revision as of 18:04, 27 April 2022


MF 6 MDT Package

Changes to options and grid data

OPTIONS

  • SAVE FLOWS – Save flows to budget file.
  • PRINT FLOWS – Print flows to listing file.
  • SORPTION – Sorption will be activated. Requires that BULK DENSITY and DISTCOEF.
  • FIRST ORDER DECAY – First-order decay will occur.
  • TSHIFTMD – Time elapsed since matrix diffusion began. Indicates that the MODFLOW start time (t = 0) is not the starting time of matrix diffusion, and the subsequent real variable.
  • MD FILEOUT – Write AIOLD1MD and AIOLD2MD coefficients to a binary file.

GRIDDATA

  • Griddata – List of available properties.
    • MD_TYPE_FLAG — The matrix diffusion type flag at any location.
    • MD_FRACTION – The immobile fraction at any location, i.e., the fraction of the total space that is occupied by the fracture/high permeability domain.
    • MD_POROSITY – The effective transport porosity at any location.
    • BULK_DENSITY – The dry bulk density of the porous matrix of the matrix domain at any location
    • MD_DIFF_LENGTH – The diffusion length for diffusive transport within the matrix domain at any location (only used for embedded heterogeneity).
    • MD_TORTUOSITY – The tortuosity of the matrix domain at any location.
    • MD_DIST_COEFF – The adsorption coefficient (Kd) of a contaminant species in the immobile domain at any location.
    • MD_DECAY – The first-order decay coefficient in water and on soil (1/time) in the matrix domain at any location.
    • MD_DIFF_COEFF – The diffusion coefficient of each species component within the matrix domain at any location.
    • AIOLD1MD – The concentration integral (equation 8) of each species in an element associated with matrix diffusion into an infinite acting adjacent aquitard (MDFLAG = 1, 3, 4, 5, 6, or 7). This value is used to restart a simulation with prior matrix diffusion.
    • AIOLD2MD – The concentration integral (equation 8) of each species in an element associated with matrix diffusion in low permeability zones that are embedded in the volume element (MDFLAG = 2, 5, 6, or 7). This value is used to restart a simulation with prior matrix diffusion.
  • Use Constant – Turn on to enter a constant value.
  • Constant Value – Enter a constant value for the property.
  • Dataset to Array – Clicking the Dataset to Array will open an array editor dialog for the specific property.

MF6

Add to MODFLOW 6 article

Packages and variables in MODFLOW-USG Transport and their equivalents in MODFLOW 6.

MODFLOW-USG Transport MODFLOW 6
Package Variable Package Variable
PSB CNC
BCT DIFFNC DSP DIFFC
BCT PRSITY MST POROSITY
BCT BULKD MST BULK_DENSITY
BCT ADSORB MST DISTCOEF
MDT MDFLAG MDT MD_TYPE_FLAG
MDT VOLFRACMD MDT MD_FRACTION
MDT PORMD MDT MD_POROSITY
MDT RHOBMD MDT BULD_DENSITY
MDT DIFFLENMD MDT MD_DIFF_LENGTH
MDT TORTMD MDT MD_TORTUOSITY
MDT DIFFMD MDT MD_DIFF_COEFF
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