Critical Storm Summary Results Table
Once the critical storm analysis is complete, this table displays the results of the analysis.
On the right-click context menu of any column, you can use "Dendritic Sort (Upstream -> Downstream)". This is the same sort option found in FlexTables.
There are twenty-two (22) available columns in the table. By default, all columns are available in the table. You can modify which columns are included by using the Edit button in the toolbar. The available columns are as follows:
- * - this column shows the color selected for the status of the node.
- Status - either OK, Surcharged, Overflow Risk, or Overflow. See the Critical Storm Analysis section to see how each status is determined.
- Node - this is the label of the node analyzed.
- Element Type - the type of node - i.e. Manhole, Catch Basin, etc.
- Downstream Pipe - this is the label of the downstream pipe connected to the node.
- Critical Scenario - this is the label of the critical scenario for this node.
- Critical Storm Event - this is the storm event assigned to the scenario in the rainfall runoff alternative.
- Soffit (Pipe) - this is the soffit of the downstream pipe.
- Elevation (Rim) - this is the rim elevation of the node.
- Freeboard (Required) - the required depth below the rim elevation that is used to determine the lower limit of the overflow risk status.
- Freeboard Elevation - this is the rim elevation of the node minus the freeboard depth.
- Freeboard Height (Minimum) - this is minimum distance of the Hydraulic Grade (Maximum) below the Elevation (Rim) for the critical scenario. This value will be negative if the element is flooded.
- Hydraulic Grade (Maximum) - this is the maximum hydraulic grade of the node for the critical scenario.
- Depth (Surcharge) - this is the derived surcharge depth of the node for the critical scenario. The surcharge depth is the difference between the maximum hydraulic grade and the pipe soffit.
- First Surcharge (Return
Period/Duration/ Rainfall Curve) - this is the label of the first scenario that
surcharged for this node. The format is return period/duration/profile.
- To calculate this, the results for the scenarios are inspected, starting with the shortest duration for the smallest return period, and increasing to the longest duration for that return period, then proceeding to the next smallest return period and the shortest duration for it, and so on, until the first scenario that causes surcharging is found.
- The return period and duration are retrieved from the scenario's storm event.
- The rainfall curve is the label of the dimensionless curve used to generate the storm event, if available. If this is not available, it is shown as <unavailable>.
- Flow / Capacity - this is the ratio of the maximum flow in the downstream pipe over the full flow capacity of the downstream pipe.
- Flow (Maximum Overflow) - the maximum overflow at the node for the critical scenario.
- Volume (Overflow) - the total volume of overflow coming out of the node for the critical scenario.
- First Overflow (Return
Period/Duration/Rainfall Curve) - this is the label of the first scenario that
overflowed for this node. The format is return period/duration/profile.
- To calculate this, the results for the scenarios are inspected, starting with the shortest duration for the smallest return period, and increasing to the longest duration for that return period, then proceeding to the next smallest return period and the shortest duration for it, and so on, until the first scenario that causes overflowing is found.
- The return period and duration are retrieved from the scenario's storm event.
- The rainfall curve is the label of the dimensionless curve used to generate the storm event, if available. If this is not available, it is shown as <unavailable>.
- Volume (Pipe, Discharge) - the total pipe volume out of the downstream pipe of the node.
- Velocity (Pipe, Maximum) - the maximum velocity of the downstream pipe.
- Flow (Pipe, Maximum) - the maximum flow in the downstream pipe.
Once the Critical Storm Table is closed, in order to re-open it, the user must rerun the critical storm analysis.