After application results have been reviewed, revisions might be needed to model data. The active forecast run in the Modeling module, indicates which software applications are being used in the forecast. For each software application, the user can edit some of the data by clicking on the appropriate software application layer in the forecast tree and using the buttons located in the Actions tab (Figure 1). Alternately, the user can click on the appropriate application icon in the Modeling module's toolbar to open that application's native interface.
For example, if the user wants to change the lookback storage (i.e., starting condition) for a reservoir, the user needs to edit the HEC-ResSim model alternative being used in the forecast run. From the Modeling module (Figure 1), from the Forecast Run Details section (Figure 1), click on the HEC-ResSim model alternative (RT-Normal). From the Forecast tabs (Figure 1), click on the Actions tab. A list of HEC-ResSim commands will display, you want to edit the HEC-ResSim model alternative, so click Edit Alternatives (Figure 1). At this point, you now have access to HEC-ResSim's Alternative Editor, the Lookback tab (Figure 1) contains the reservoir starting storage (and elevation) values (among other initial conditions).
Once you have made your model alternative revisions, be sure to save the watershed. The example, provided you with one way to edit model alternatives, there are several other ways in HEC-RTS to edit model alternatives. If revisions are made to a model alterantive from the Forecast Run Details area (Figure 1) of the Modeling module, the revisions are only applicable for the forecast run that is part of the selected forecast. Other forecast runs (as well as other forecasts that have been run with the selected forecast run) will not contain the revisions. If the user wants the forcast run revisions to be available for subsequent forecasts, then you will need to save the revisions to the "base" data. To save "base data", select the forecast run (Daily – Interpolated Obs and Manual Entry QPF) that contains the revisions, click the Actions tab (Figure 1), click Save To Base (located on the Actions tab).