A HEC-RAS alternative consists of model geometry, set of boundary conditions, and a plan file linking the two. If the HEC-RAS project contains more than one plan (for steady flow and unsteady flow conditions, for instance), you can build HEC-RAS model alternatives around each of them.

Import a HEC-RAS Alternative

To import a HEC-RAS model alternative:

  1. From the HEC-RTS main window, click on the Setup module, from the Models menu, point to Import, click RAS, the Select RAS project to import from browser (Figure 1) opens.
    Figure 1 Select HEC-RAS project to import from Browser 
  2. Browse to the location of an HEC-RAS project you wish to import. Select an HEC-RAS project file (.prj), click *Open, the Select HEC-RAS project to import from browser will close.
  3. The import begins, an Import Progress window will open displaying the progress of the import. The Import Progress window will close when the import is complete, and a Message window will open letting you know the import is complete. Once the import is complete, save your HEC-RTS study.

Edit a HEC-RAS Alternative

To edit a HEC-RAS alternative:

  1. From the HEC-RTS main window, click on the Setup module, from the Watershed Tree, from the Models folder, expand the RAS node (Figure 2). This provides you with a list of all the available HEC-RAS plans for the HEC-RTS study.
    Figure 2 HEC-RAS Shortcut Menu
  2. Right-click on an HEC-RAS alternative, a shortcut menu will display (Figure 2). From the shortcut menu, select the HEC-RAS component you wish to modify. Edit the HEC-RAS alternative as desired. For further information on how to modify HEC-RAS alternatives, refer to the HEC-RAS User's Manual.

Copy a HEC-RAS Alternative

To copy a HEC-RAS alternative:

  1. From the HEC-RTS main window, click on the Setup module, from the Watershed Tree, from the Models folder, expand the RAS node (Figure 2). This provides you with a list of all the available HEC-RAS plans for the HEC-RTS study.
  2. Right-click on an HEC-RAS alternative, from the shortcut (Figure 2), click Plan Data. The HEC-RAS plan for the example watershed, is an unsteady flow plan, so the HEC-RAS Unsteady Flow Analysis dialog will open.
  3. From the File menu, select Save Plan As, the HEC-RAS Save Plan Data As dialog (Figure 3) opens.
    Figure 3 HEC-RAS - Save Plan Data As
  4. From the HEC-RAS Save Plan Data As dialog, specify a new plan name in the Title box (Figure 3).
  5. Click OK, the HEC-RAS Plan Identifier dialog (Figure 4) opens.
    Figure 4 HEC-RAS - Plan Identifier Dialog
  6. Enter an identifier in the HEC-RAS Plan Identifier dialog (Figure 4). Click OK to complete the copy process.

Delete a HEC-RAS Alternative

To delete a HEC-RAS alternative:

  1. From the HEC-RTS main window, click on the Setup module, from the Watershed Tree, from the Models folder, expand the RAS node. This provides you with a list of all the available HEC-RAS plans for this watershed.
  2. Right-click on an HEC-RAS alternative, from the shortcut (Figure 2), click Plan Data. The HEC-RAS plan for the example watershed, is an unsteady flow plan, so the HEC-RAS Unsteady Flow Analysis dialog will open.
  3. From the File menu, click Delete Plan, the HEC-RAS Delete Plan File dialog (Figure 5) opens.
    Figure 5 HEC-RAS - Delete Plan File Dialog
  4. From the HEC-RAS Delete Plan File dialog, select the plan you want to delete, and click OK. The HEC-RAS Delete Plan File dialog will close.
  5. A window will open asking you if you want to delete the selected plan. Click OK to complete the deletion process.