GMS:MF6 TDIS Package

The Temporal Discretization (TDIS) Package dialog

The Temporal Discretization (TDIS) Package dialog is accessed by double-clicking on the TDIS package under a MODFLOW 6 simulation in the Project Explorer. It contains the following sections and options:

• Sections list – A list of sections that can be turned on or off:
  • Comments – Turn on to make the Comments section visible.
  • Options – Turn on to make the Options section visible.
  • PeriodData – Turn on to make the PeriodData section visible. This section is on by default.
• Comments section – Enter general alphanumeric comments. Comments entered here get written at the top of the file, preceded by a '#' symbol.
• Options section – Temporal options and settings:
  • Time units drop-down – A drop-down menu with the following options for the type of time units:
    • "Unknown"
    • "Seconds"
    • "Minutes"
    • "Hours"
    • "Days" – The default selection.
    • "Years"
  • Start date/time – Turn on to enable setting a start date/time. Click the Date/Time... button to bring up the Date/Time dialog. The time can also be manually entered using "YYYY-MM-DDTHH:MM:SS" format. The "T" in the middle divides the date from the time.
• PeriodData section – Contains a spreadsheet listing periods. An Add Row button is found at the top rigth of the spreadsheet. Right-clicking on the row number in the spreadsheet gives a menu that allows inserting, deleting, copying, or pasting a row. The columns in the spreadsheet include:
  • PERLEN – The length of a stress period. The default value is "1.0".
  • NSTP – The number of time steps in a stress period. The default value is "1".
  • TSMULT – The multiplier for the length of successive time steps. The default value is "1.0".
  • ENDDATE – The end date for that period. This field is not directly user-editable, but will automatically change if the PERLEN value is changed.
  • STEADY-STATE GWF_Model – Turn on if the period is steady state and using the GWF Model.

Related Topics

• MODFLOW 6