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|Click to download the Introductory [US units] tutorial model files.|
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 Arch Chamber SWC and the orange highlighted storm representing the critical (i.e. highest water level) event.
Note how the % available results for the 100 year event show 6% - this is reporting that there is 6% unused volume in the SWC before it is completely inundated to its exceedence level (i.e. the top). Looking at the combination of the Profile, Arch Chamber SWC dimensions and the Summary Results it can be seen that the chambers themselves are exceeded by the runoff volume, though due to the incorporation of the Embedded storage the facility is able to detain enough addition runoff volume to keep from over topping. Select the upper right X buttons to close any dialogs that are open.
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 that a connection will be highlighted in Red if the Flow/Capacity relationship is greater than 1.0 - this would indicate a potentially undersized pipe. Flow/Capacity 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. As the (likely conservative) Rational based Pipe Sizing was performed no segment of the network has a Flow/Capacity greater than 1.0. Close this dialog to continue reviewing other results.
Detailed Individual Results
Either right-click the Arch Chamber SWC and select Show Results or select Stormwater Controls under the Results ribbon to view detailed results for the Chamber 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 Chamber structure.
With so many configurations of detention Chambers possible (arched, circular and rectangular shapes are all available) no 3D view specific to the Chamber Stormwater Control (SWC) has been added for the current release of the software. 3D views of structures and animations of inundation can be a clear and highly understandable way to represent what happens within a complex mitigation system - for this reason we encourage you to explore the 3D results view for all SWCs, with Chamber being the only exception. Close this dialog when done reviewing the various graphical output options.
Profile Long Section
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. 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).
Pre- Post-Development Phase Comparison
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 Arch Chambers detention system. Close the Phases Report when done comparing the range of results available for review.
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