A HEC-ResSim model alternative consists of a watershed schematic, stream and reservoir network, and a set of operations for each reservoir. Within a 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 summer and winter conditions, for instance), you can build HEC-ResSim model alternatives around each of them.

Import a HEC-ResSim Watershed

To import HEC-ResSim watershed: 

1. From the File menu, point to Import, click HEC-ResSim and the Import Type dialog (Figure 1) opens.
   
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 (files with .wksp extensions) you want to import, and click Open. The import will automatically begin and an Import Progress dialog opens indicating that the import is occurring.
4. The Import Progress dialog closes automatically once the import is complete and the Message window will show, "ResSim Import Complete".
5. Save your watershed.

Import a HEC-ResSim Alternative

To import HEC-ResSim alternative: 

1. On the File menu, select Import > HEC-ResSim and the Import Type dialog (Figure 1) opens. 
2. Click Alternative and the Import Alternative Wizard (Figure 2) opens.
3. Select "…" and the file browsing dialog opens. Navigate to and select the HEC-ResSim watershed (files with .wksp extensions) you want to import, and click the OK button.
4. Select Next, and choose an alternative from the Available Alternatives table. 
   
5. Choose 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. 

Edit a HEC-ResSim Alternative

To edit a HEC-ResSim alternative: 

1. From the Watershed Pane in the Setup Module, select the HEC-ResSim model alternative.
2. Right-click on the HEC-ResSim alternative, from the shortcut menu (Figure 3), click Edit Alternatives, the ResSim Alternative Editor opens (Figure 4).
3. Edit the HEC-ResSim alternative as desired. For further information on how to modify HEC-ResSim alternatives, see the HEC-ResSim User's Manual.
4. Select Save from the Alternative menu.
5. Click Close from the Alternative menu and ResSim Alternative Editor closes. 
   
   

Copy a HEC-ResSim Alternative

To copy a HEC-ResSim alternative: 

1. From the Watershed Pane in the Setup Module, select the HEC-ResSim model alternative.
2. Right-click on the HEC-ResSim alternative, from the shortcut menu (Figure 3), click Edit Alternatives, the ResSim Alternative Editor opens (Figure 4).
3. Select Save As from the Alternative menu and the Save As dialog (Figure 5) opens.
   
4. In the Save As dialog, enter alternative name in the Name field (required) and a description in Description field (optional).
5. Click OK, and the Save As dialog closes. The copied alternative is shown in the HEC-ResSim Alternative Editor.

Delete a HEC-ResSim Alternative

To delete a 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.

1. Click Close from the Alternative menu, and the HEC-ResSim Alternative Editor closes.