Now that all of the building blocks have been configured (alternative, analysis period, program order, models), the user can now create an HEC-WAT simulation. To create an HEC-WAT simulation: 

  1. From the HEC-WAT main window, from the WAT Tools toolbar, click the Alternative and Simulation Manager button Alternative and Simulation Manager button.
  2. The Alternative and Simulation Manager opens. From this dialog box the user can create/modify alternatives, analysis periods, simulations, program orders, link models, and make runs.
  3. To create a simulation, from the table right-click on the intersection of an alternative and analysis period. From the shortcut menu click Create Simulation.

    Alternative and Simulation Manager - Create Simulation



  4. The Create New Simulation dialog opens. 

    HEC-WAT has defined a default name for the simulation (Without Project Conditions-RR_Feb1986) in the Name box. The name is a combination of the HEC-WAT alternative name and analysis period name, where the intersection was in the table (name can be changed). Also, in the Alternative and Analysis Period lists the selections have already been made based on the intersection in the table. The selected Alternative cannot be changed, but the selected Analysis Period can be changed.

    Create New Simulation Dialog



  5. Select the program order you created earlier (HMS-ResSim-RAS).
  6. In the F Part box, the default F Part is displayed that was generated by HEC-WAT based once again on the alternative and analysis period names.
  7. In the Models table, the software applications that were defined in the program order appear the Programs column in the order defined in the selected program order. Now the user must select the appropriate model alternatives (plan, run) for each software application. From the Alternative column, from the list for HMS, select the appropriate HMS model alternative ((RUN)Feb_1986).
  8. Repeat the process for the other software applications. Below is the list of the appropriate model alternatives for the RussianRiver study:
    • HMS - (RUN)Feb_1986
    • ResSim - calibrate
    • RAS - Base for Real Time forecasting
  9. Now that all of the model alternatives have been selected, click OK. T to close the Create New Simulation dialog and return to the Alternative and Simulation Manager. Note that the intersection of an HEC-WAT alternative and analysis period now provides information about the created simulation.

    Alternative and Simulation Manager - Completed Simulation



  10. Click OK to close the Alternative and Simulation Manager and add the created simulation to the Study Tree, under the Simulations folder.

    Study Tree with Created Simulation



  11. The Content Pane displays information about the selected simulation.

    Content Pane (red box) - Displaying the Details for an Example Simulation



  12. From the Study Tree, double-click on the simulation name (Without Project Conditions-RR_Feb1986), a Select Map dialog opens.
  13. Click New Map Window, and click OK. The Select Map dialog closes and the new map window will contain the schematic elements that represent the simulation.

    Map Windows - Schematic (Left) and Selected New Simulation (Right)