User's guide of Proceessing Modflow 5.0

Processing Modflow 131
3.6.4 MT3DMS
As MT3DMS retains the same modular structure of the MT3D code, the interface implemented
in PMWIN is very similar to the MT3D interface. One of the major differences is that you are
asked to specify initial concentration, source concentration and paramters for chemical reactions
for each active species in the Data Editor. Before switching to the Data Editor, PMWIN will
display a dialog box, which allows you to manage the data of each species. For example, if you
select MT3DMS < Initial Concentraion..., the Initial Concentration (MT3DMS) dialog box
(Fig. 3.48) will appear. You have the following options.
1. Edit the initial concentration data for a species by selecting a row from the table and clicking
the Edit button. After specifying and saving the data, the Active and Data flags will be
checked.
2. You may click on an Active flag to activate or deactivate a species.
3. The Data flag offers three status configuration possibilities:
- data has been specified and will be used for simulation.
- data has been specified, but will not be used; the default value of zero will be used.
- data is not available (the flag is dimmed and deactivated).
Once the data is specified, you may click on a Data flag to check or uncheck it.
Fig. 3.48 The Initial Concentration (MT3DMS) dialog box
3.6.4 MT3DMS