The OSI configuration is saved with the Alternative data. This means that the OSI can (and must) be configured separately for each new alternative; however, if an alternative is created using SaveAs from an existing alternative that already has an OSI configuration, the new alternative will include a copy of the OSI configuration from the original alternative.
To configure the OSI for a given alternative, a simulation must first be created and the alternative computed.
With the desired Alternative active, select Simulation → Operation Support Interface from the main menu of the Simulation module. The ResSim Operation Support Interface will open. The OSI will initially be empty. Add tabs and variables (as described in the following sections). A basic arrangement will be to show headwater local flows first, then other locals, then reservoir releases and supporting time series. From the menu bar select File → Save to save the OSI configuration. From the Alternative, the Save to Base command allows the OSU to be used with the Alternative in new Simulations, while the Replace from Base command allows the configuration to be used in existing Simulations.
Typical workflow once the OSI has been configured for an Alternative is as follows:
- Create a new Simulation using the desired Alternative
- Run the simulation at least once from the Simulation Model
- Open the Operations Support Interface
- Compute All Local Inflows
- Perform Hydrograph Recession on Headwater Locals
- Perform Hydrograph Recession on other Locals
- Edit Reservoir Releases or Elevation Targets
The OSI overwrites time series data for Junction Known Flows in the simulation.dss file and release and elevation targets in the overrides dss file associated with the Alternative.