Results for a Depth-Area Analysis are generated by computing it. Changes in all the components used in the analysis are automatically tracked to determine if the results are current. When the results are no longer current, the analysis must be recomputed in order to refresh the results. Computing results begins with selecting a Depth-Area Analysis .

Selecting a Current Depth-Area Analysis 

There are two ways to select the current Depth-Area Analysis. Both methods set the analysis so that it can be computed and results can be accessed from the Watershed Explorer and the Basin Map as soon as they are available. The current Depth-Area Analysis shown in the title of the Basin Map.

The first way to select the current Depth-Area Analysis from the Toolbar. The compute selection box shows all of the compute components in the project; Depth-Area Analysis appear after Forecast Alternatives in the selection box. Each Depth-Area Analysis in the selection box includes the prefix Depth-Area followed by the name of the analysis. Click on the toolbar selection box and choose a Depth-Area Analysis to become the current analysis.

The second way to select the current Depth-Area Analysis from the Watershed Explorer, on the Compute tab. Select the Depth-Area Analysis you wish to become the current analysis by clicking on it in the Watershed Explorer. The Depth-Area Analysis are listed alphabetically in the Depth-Area Analysis folder.

Computing a Depth-Area Analysis 

There are three ways to compute the currently selected Depth-Area Analysis. All methods automatically perform parameter checking, and if no errors are generated, proceed to the actual computing of Depth-Area Analysis results. Additionally, the program is designed to be computationally efficient. Only components with data changes since the last compute will be recomputed; the remainder of the components have not changed so previous analysis results are still applicable. If you wish, you may force all components to be recomputed regardless of data changes since the last compute.

The first way to compute a Depth-Area Analysis from the Compute menu. Click on the Compute menu and then select the Compute Depth-Area command. The name of the current Depth-Area Analysis shown in brackets as part of the menu command. If the command is not available, it is because there is no current Depth-Area Analysis ; you must first select an analysis. A window will automatically open that shows the progress of the compute. You will need to manually close the window when the compute is done, whether it failed or was successful. If you wish to force all components to be recomputed instead of just those with data changes, hold the CTRL key while selecting the menu command.

The second way to compute a Depth-Area Analysis from the Watershed Explorer, on the Compute tab. Select the Depth-Area Analysis you wish to compute by clicking on it in the Watershed Explorer with the right mouse button. A context menu is displayed that contains several choices including compute. Click the Compute command. The progress window will automatically open. If you wish to force all components to be recomputed instead of just those with data changes, hold the CTRL key while selecting the right mouse menu command.

The third way to compute a Depth-Area Analysis from the Toolbar. The compute button is enabled whenever there is a current analysis that can be computed. If the button is not available or shows a different type of compute, you must first select a Depth-Area Analysis . Press the button to compute the current Depth-Area Analysis . The progress window will automatically open. If you wish to force all components to be recomputed instead of just those with data changes, hold the CTRL key while selecting the toolbar button.

Computing Multiple Analyses

Multiple Depth-Area Analysis can be computed in rapid succession. Each analysis included for simulation is internally managed the same as if it were computed in isolation. The steps automatically performed for the user begin with selecting the Depth-Area Analysis , checking parameters for the analysis, and finally computing the simulation. This sequence is repeated in rapid succession for each Depth-Area Analysis in the selected set. Appropriate feedback is provided through a progress bar.

The multiple Depth-Area Analysis must exist before they can be selected for a multiple compute. Select the Multiple Compute command on the Compute menu. A manager is used to select Depth-Area Analysis (see figure below). Make selections in the list and then press the Compute button to begin computing the selected analyses. A separate progress bar will be displayed for each Depth-Area Analysis as it is computed. The progress bar may disappear automatically at the conclusion of a Depth-Area Analysis depending on the configurations in the Program Settings. If errors are encountered while computing an analysis, the progress bar will always remain visible after all selected analyses have finished computing regardless of any other settings.

Selecting multiple Depth-Area Analyses for sequential compute