To create a new initial condition set in ResSim, follow these steps:

  1. From the ResSim main window, go to the Water Quality module, click the Water Quality menu, and then select Initial Conditions. This will open the Initial Condition Set Editor.

  2. In the Initial Condition Set Editor, click on the Initial Condition Set menu and then choose New. This will open the Create New Initial Condition Set dialog box.

  3. In the Name box, enter a name for the new initial condition set (e.g., Initial_CondSet1 in Create New Initial Condition Set Dialog Box). Enter an optional Description in the Description box to help identify the set later.

  4. From the WQ Constituent Set dropdown list, select the desired constituent set to associate with the initial condition set.

  5. Below the WQ Constituent Set dropdown, there is the Geometry dropdown list. Select the desired geometry dataset that will be linked with the initial condition set.

  6. Once you’ve entered the necessary information, click OK to create the initial condition set. If the name is unique and all fields are valid, the new initial condition set will be created.



Create New Initial Condition Set Dialog Box

Click OK to close the Create New Initial Condition Set dialog and save the new initial condition set. The newly created dataset is then added to the Initial Condition Set navigation bar in the Initial Condition Set Editor. If the name you entered already exists, a Duplicate Name message dialog will appear. In this case, click OK to close the dialog, then go back to the Create New Initial Condition Set dialog. Enter a unique name in the Name box and click OK again. The dialog closes, and the dataset is added to the navigation bar.

If either the WQ Constituent Set or Geometry lists are left empty, a warning dialog (e.g., No Geometry Selected) will appear. Close the warning dialog, select the missing dataset, and click OK to finalize creating the set.

After successfully creating the initial condition set, the Initial Condition Set Editor will update:

    • The linked Geometry Dataset is displayed (which includes reservoirs, junctions, boundary condition locations, observed data locations, and reservoir outflow junctions).
    • The linked WQ Constituent Set is populated into the Reservoirs, Junctions, and Reservoir Outflow Junctions tabs, showing the editable tables with the relevant information.