User:Jcreer/GMS 99.99 Changes

• Press the L key to select cells on a single layer on a 3D grid.

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 Content

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

Simulation Run Queue and command changes.

MF 6 Flow Budget

The MODFLOW 6 Flow Budget dialog

The Flow Budget dialog for MODFLOW 6 can be accessed by right-clicking on the MODFLOW 6 simulation and selecting the Flow Budget command. The dialog contains the flow budget results from the MODFLOW 6 simulation run. The dialog cannot be accessed if the solution from the simulation has not be imported into the project.

The dialog will display the flow in and flow out for the sources/sinks, selected zones, and summary of the solution data. The dialog contains the following option:

• Precision – Sets the precision of the decimal values in the dialog.