Part 3 – Model Linking and Compute Simulation
For this workshop for our new simulation we will progress through the following steps. First, we will go through the Model Linking to adjust the links for the new HEC-ResSim model alternative. The last step for this part will be to compute the deterministic simulation.
Open the Model Linking Editor for a Specific Simulation
1. From the HEC-WAT main window, from the Study Tree right-click the simulation "Baseline-RR_Jan1997". From the shortcut menu, point to Tools and click Model Linking Editor. The Model Linking Editor will open with the Simulation Baseline-RR_Jan1997 automatically selected.
2. From the Model To Link list select ResSim-Baseline. The Input From Model column should automatically select to HMS-(RUN)Run-1 Hour. If this did not occur, use the Default Model To Link button to select the HMS model alternative.
3. Check that the Coyote-Pool and Warm Springs-Pool locations display "… - Pool Elevation" in the Location/Parameter column, and if the location/parameter is incorrect, select the appropriate location/parameter from the dropdown list.
4. From the Model Linking Editor toolbar click 
to save the linking.
Use Dynamic Linking
5. From the Model To Link list select RAS-RR_Real-Time. Note, that the two locations (DryCreek DryCreek RS 14.28 (Warm Springs Out) and Russian CoyoteToDC RS 99.93 (Coyote Out)) in the HEC-RAS linking are listed in green and still linked to the HEC-ResSim ResSim-RT-Normal2 model alternative. In order to fix this and allow the HEC-RAS model alternative to link to two different ResSim model alternatives for two different simulations we will use Dynamic Linking.
- Note, if dynamic linking is not used for the new Baseline simulation, then the RAS-Russian River model alternative will look for results from the ResSim-RT-Normal2 model alternative instead of the ResSim-Baseline model alternative during the compute.
6. From the Model Linking Editor table select both locations (DryCreek DryCreek RS 14.28 (Warm Springs Out) and Russian CoyoteToDC RS 99.93 (Coyote Out)), and from the toolbar click the Dynamic Linking 
icon.
7. Complete the Dynamic Linkage Editor. Click OK.
8. The selected locations now display a checkmark in the Dynamically Linked column and the locations are displayed in blue. This indicates the two locations are dynamically linked to different model inputs in different HEC-WAT simulations. From the Model Linking Editor toolbar click 
to save the linking.
9. Close the Model Linking Editor. Save the HEC-WAT study.
Compute the Simulation
1. The deterministic simulation is now ready to be computed. To compute the simulation, from the Study Tree, right-click on the simulation name, Baseline-RR_Jan1997, from the shortcut menu point to Compute and while holding down the Ctrl key, click Simulation (CTRL to Force).
2. The compute should run in the opened Compute Progress window.
3. The compute complete dialog should look like the figure below. Close the Compute Progress window once the compute is complete.
