The Junctions Summary Results shows a summary of how each Junctions in the current phase performed.
Filtering the Results
For phases containing only Baseflow or Input Hydrographs filtering will not be available.
When the All Items radio button is selected, the summary shows the maximum flow rates entering and leaving together with details of the volumes for each of the Junctions in the Phase for the current storm/event as highlighted on the Storm Selector on the Status Bar. The Select Filter drop down filters the results to show All Items or a selected Flow Paths.
When the All Storms radio button is selected, the summary shows the maximum flow rates in and out of the Junctions selected in the Select Item drop down, together with details of the volumes for each of the storms run. This is of most interest when Rainfall with multiple storms is selected on the Analysis Criteria.
Critical Rank By selection
For phases containing only Baseflow or Input Hydrographs critical rank by option will not be available.
The Critical Rank By dropdown allows the selection of a specific property in the summary that will determine the critical storm (see below).
For ARR 19 Rainfall the critical rank by option is used to determine which of the 10 temporal patterns run for an AEP / Increase Rainfall / Storm Duration set has the value which is the first temporal pattern above the mean (average) over the 10 results for the given property.
For example, if the property we are looking at is Max Depth, and the table below represents the values for the given temporal pattern
| Temporal Patterns | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| Max Average Depth | 5.5 | 6.2 | 3.1 | 4.5 | 2.6 | 1.5 | 4.87 | 3.65 | 1.56 | 5.56 |
mean = (5.5 + 6.2 + 3.1 + 4.5 + 2.6 + 1.5 + 4.87 + 3.65 + 1.56 + 5.56) / 10 =3.904
The first temporal pattern above the mean is Temporal Pattern 4 (4.5), which will then be used for the critical by comparisons as described below.
Critical Storm
When pressed, the Critical Storm toggle button will display the critical storm in the following ways:
- When the All Items radio button is selected, the critical storm and its results for each Junction are displayed, rather than the selected storm.
- When the All Storms radio button is selected, the row containing the critical storm for the currently selected Junction is highlighted in orange. If two or more storms are critical only the first one will be highlighted.
The critical storm for a Junction is defined to be that storm that has the largest value for the selected Critical Rank By property.
Critical by Return Period
When pressed, the Critical by Return Period toggle button will display the critical storm for the return period / increase rainfall grouping from the currently selected storm.
The return period / increase rainfall groupings are as follows for the given rainfall sets:
FEH / FSR / Chinese Design - grouped by Return Period and Increase Rainfall from the current storm. e.g if the current storm is FEH: 5 years: +30%: 120mins Winter - then the critical storm will be identified from all the results for FEH 5year + 30% storm duration range.
ARR - grouped by AEP and Increase Rainfall from the current storm. e.g if the current storm is ARR: 50 %: +30%: 120mins - then the critical storm will be identified from all the results for ARR 5% + 30% storm duration range.
Desbordes / Known / User Defined - grouped by Increase Rainfall from the current storm. e.g if the current storm is Desbordes: 5 years: +10%: 15mins - then the critical storm will be identified from all the results for Desbordes +10% storm duration range.
SCS - no grouping. All SCS results are considered.
- When the All Items radio button is selected, the critical storm and its results for each Junction are displayed, rather than the selected storm.
- When the All Storms radio button is selected, the row containing the critical storm for the currently selected Junction is highlighted in orange. If two or more storms are critical only the first one will be highlighted.
The critical storm for a Junction is defined to be that storm that has the largest value for the selected Critical Rank By property.
Spreadsheet Preferences
Fields can be turned on or off using the Spreadsheet Preferences form that is accessed from the toolbar at the top of the form. The full set of columns available are shown and can be turned on or off using the check boxes. These settings will be remembered between sessions.
Simulation Health
If the results of the analysis are showing issues for the current storm, or one of the storms if showing critical/all storms, a message will be shown at the top of the form. More information can be found in the Simulation Health section.
Results
Cover Elevation - The cover elevation of the Manhole is shown for reference.
Invert Elevation - The invert elevation of the Junction is shown for reference. Note: if abstract connections (No Delay, Lagged Flow) are connected to a simple junction then this will be left blank).
Max Elevation - The maximum water elevation (above datum) reached in the item for the selected or displayed rainfall event. Note: if abstract connections (No Delay, Lagged Flow) are connected to a simple junction then this will be left blank).
Max Depth - The maximum water depth (above invert elevation) reached in the item for the selected or displayed rainfall event. Note: if abstract connections (No Delay, Lagged Flow) are connected to a simple junction then this will be left blank).
Max Inflow - The maximum inflow (totaling all inlets) reaching the item for the selected or displayed rainfall event. This does not include Bypassed inflow.
Max Resident Volume - The maximum volume in the item for the selected or displayed rainfall event including flooded volume. Note: if abstract connections (No Delay, Lagged Flow) are connected to a simple junction then this will be left blank).
Max Flooded Volume - The maximum volume above the exceedance elevation or cover elevation in the item for the selected or displayed rainfall event. Note: only Manholes can flood.
Max Outflow - The maximum outflow (totaling all outlets) leaving the item for the selected or displayed rainfall event.
Total Discharge Volume - The total volume leaving the item, through all outlets for the selected or displayed rainfall event.
All numeric columns are shown to a default number of decimal places based on the unit. If you want to see more or less decimal places, you can select Increment Decimal or Decrement Decimal from the right click menu. This setting will not be saved between sessions.
Status - Based on the elevation in the Junction, the following status will be shown:
- OK - The maximum water elevation is below the outgoing Pipe Crown or for other connection types the elevation is below the Cover Elevation.
- Surcharged - The maximum water elevation is below the Cover Elevation but is above the outgoing Pipe Crown.
- Flood Risk - The maximum elevation is above the outgoing Pipe Crown but is below the Cover Elevation by the Flood Risk Margin depth.
- Flood - The maximum water elevation is above the Cover Elevation.
HGL (Hydraulic Grade Line) - Represents the maximum water level within each node of the drainage system. It is a crucial indicator of the static pressure in the system. More information can be found in the Hydraulic and Energy Grade Lines page.
EGL (Energy Grade Line) - A graphical representation that embodies the total energy present within the drainage system at various points. More information can be found in the Hydraulic and Energy Grade Lines page.
Freeboard - Controls how close to the specified Exceedance Elevation the water must reach before the Status shows Flood Risk.
Sealed Manholes
By definition the water elevation in a sealed manhole will never exceed the cover. Therefore the status of a sealed manhole is only ever OK or Surcharged. In any case where it was required to cap the water elevation, i.e. an unsealed manhole would have flooded. The status is marked with an asterisk, i.e. OK* or Surcharged*.