SWMM - Nodes - Outfall

Outfalls are end nodes of the drainage/sewer system used to define the final downstream boundaries under Dynamic Wave flow routing.

For other types of flow routing, they behave like a join. Only a single link can be connected to an emissary node, and there is the option of having the outfall discharge on the surface of a sub-Catchment.

In addition to the SWMM node properties, the tailpipe also has the following properties:

• Outfall Type
  • Outfall Type
    • Free - output stage determined by minimum critical flow depth and normal flow depth in the connecting conduit
    • Normal - output stage based on normal flow depth in connecting conduit
    • Fixed - output stage set to a fixed value
      Enter the fixed stage value in the Constructor
    • Tide - Tidal Curve
      In this case, enter the Tidal Curve that describes the height of the tide versus time of day in the Constructor
    • Time Series - Time Series
      In this case, enter the name of the User-defined time series of stage versus time in the Constructor
• SWMM
  • Receiving Catchment - Name of a sub-Catchment that receives the discharge from the outfall
  • Retention Device - Indicates if the device has a retention gate
  • Bottom Elevation - Elevation of the bottom of the node (radier elevation)
    It must be associated with the property of the constructor that manages the device's Sump Elevation, for example:
    
    

Note: Read-only properties are intrinsic properties of the device, so the type change has to be done in Constructor.

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If it is not visible, it means that the network is not enabled for SWMM. Enable it in your properties: