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Whenever a stormwater system is analyzed the SWC Summary result table is shown. This will list a range of important information regarding how well the individual system elements performed, if they flooded and what volume capacity remains at critical inundation conditions.
When viewing the SWC Summary result form select All Storms and Critical Storm options to view results for all rainfall for the Vault SWC and the orange highlighted storm representing the critical (i.e. highest water level) event.
Note how the % available results show negative values for the 5 and 100 year ARI storm events. This is based on the max Water Surface Level (WSL) relative to the Freeboard level of the SWC. With a freeboard of 6 inches (i.e. the top 6 inches of the facility are considered the freeboard zone) the results show that this is exceeded, though the max WSLs are still under 4ft, which is the max depth of the facility. Select the upper right X buttons to close the dialogs.
Open the Connection Summary results under the Results ribbon and select Critical Storm to see how the pipe network performed.
The 100 year ARI storm is the most dominant rainfall event so it is no surprise that the same storm is the critical event for all of the pipe network. However, note the red connection line indicating a potentially undersized pipe based on the Flow/Capacity relationship. This is the max flow calculated during the analysis divided by the ‘pipe full flow Manning's equation’. When this value is over 1, or even over 0.8, it often an indication that this connection would benefit from being upsized. Close this dialog to continue reviewing other results.
Either right-click the Vault SWC and select Show Results or select Stormwater Controls under the Results ribbon to view detailed results for the Vault structure.
Switch the Storm Selection to the 100 year ARI event and uncheck the Graph types and options so just the Flow Graph is selected, with Total Inflow and Total Outflow checked. Using either the zoom controls or the mouse wheel, zoom into the graph to review the peak flow portion of the graph.This graphical view clearly shows the flow mitigation that results from the use of the Vault structure.
Switch to the 3D tab in order to view a 3 Dimensional representation of the Tank. Twist and Zoom the display by using the mouse or the controls in the upper right of the 3D view dialog. Right click on the 3D view to change 3D rendering and display items. Note that for Tank Stormwater Controls currently only a circular 3D rendering is provided, even if other shapes have been defined.
Close this dialog when done reviewing the various graphical output options.
View a Profile of the Flow Path either by using the Tree View or the View Ribbon, Profiles option.
Using the animation display controls, play through the hydraulic analysis – zoom into the Profile using the zoom controls or the mouse wheel to review different section of the network. Playing through the animation will show the Warning icons on the Profile when surcharging occurs at Junctions and when the Freeboard is encroached up at the Vault SWC. Close the Profile when done reviewing the Flow Path performance. To turn off the Summary Table below the profile select the Summary Table icon toggle on the top of the Profile dialog (see arrow in image below).
A comparison between the Existing and Developed site conditions can be performed using the Phases Report under the Results ribbon. Upon opening the Phases Report select the Update Preview button to show the results based on the selected Phases, Storms and Output variables.
In the image shown, it is clear to see the reduction achieved in the Development Phase site with the implementation of the Vault detention system. Close the Phases Report when done comparing the range of results available for review.