An HEC-ResSim model alternative consists of a watershed schematic, stream and reservoir network, and a set of operations for each reservoir. Within an HEC-ResSim alternative, you can override simulated forecasted releases to mimic desired operation during the forecast period. If the HEC-ResSim project contains more than one network alternative (for example, summer conditions and winter conditions), you can build HEC-ResSim model alternatives around each of the network alternatives.

Importing an HEC-ResSim Watershed

To import an HEC-ResSim watershed: 

  1. From the Watershed Panel in the Setup module, right-click on the HEC-ResSim icon and select Import. The Import Type dialog will open.
    Import Type Dialog
  2. Click Watershed to import the HEC-ResSim watershed (stream alignment, network, configurations, and alternatives). This will open a file browsing dialog.
  3. From the file browsing dialog, navigate to and select the HEC-ResSim watershed (.wksp extension) you want to import, and click Open. The import will automatically begin and an Import Progress dialog will open.
  4. The Import Progress dialog closes automatically once the import is complete and the Message window will show ResSim Import Complete.

Importing an HEC-ResSim Alternative

To import an HEC-ResSim alternative: 

  1. From the Watershed Panel in the Setup module, right-click on the HEC-ResSim icon and select Import. The Import Type dialog will open. 
  2. Click Alternative and the Import Alternative Wizard will open.
    Import Alternative Wizard - Step 1
  3. Click on the ellipses to the right of the Watershed File box and the file browsing dialog will open. Navigate to and select the HEC-ResSim watershed (.wksp extension) you want to import, and click the OK button.
  4. Select Next, and choose an alternative from the Available Alternatives table. 
    Import Alternatives Wizard - Step 2
  5. Select Next, enter a name in the Name field and a description in the Description field for the new alternative. 
  6. Select Next, enter a name in the Name field and a description in the Description field for the new reservoir network. 
  7. Select Next, and assign the stream names in the To Stream column in the table.
  8. Select Next, and if needed, resolve network computation points by selecting watershed computation points from the Watershed Computation Point column of the table.
  9. Select Next, and view the Import Summary. If needed, you can copy or print the summary.
  10. Click Finish, choose Yes on the Continue with Import dialog and Save your watershed. 

Editing an HEC-ResSim Alternative

To edit an HEC-ResSim alternative: 

  1. From the Watershed Pane in the Setup module, right-click on an HEC-ResSim model alternative and select Edit Alternatives from the shortcut menu. The ResSim Alternative Editor will open.
    ResSim Alternative Editor
  2. Edit the HEC-ResSim alternative as desired. For further information on how to modify HEC-ResSim alternatives, see the HEC-ResSim User's Manual.
  3. Select Save from the Alternative menu.
  4. Click Close and the ResSim Alternative Editor will close. 

Copying an HEC-ResSim Alternative

To copy an HEC-ResSim alternative: 

  1. From the Watershed Pane in the Setup module, right-click on an HEC-ResSim alternative and select Edit Alternatives from the shortcut menu. The ResSim Alternative Editor will open.
  2. Select Save As from the Alternative menu and the Save As dialog will open.
    Save As Dialog
  3. In the Save As dialog, enter alternative name in the Name field (required) and a description in Description field (optional).
  4. Click OK, and the Save As dialog will close. The copied alternative is shown in the ResSim Alternative Editor.

Deleting an HEC-ResSim Alternative

To delete an HEC-ResSim alternative, launch HEC-ResSim from the CAVI and delete the network alternative from the HEC-ResSim network module. For further information on how to delete alternatives in HEC-ResSim, see the HEC-ResSim User's Manual.