SWMM - Links

Links are the transport components of a drainage system and always run between a pair of nodes. Link types include:

1. Conduits - are pipes or channels that move water from one node to another in the transport system
2. Pumps - links used to raise water to higher altitudes
3. Orifices - Used to model outlet and diversion structures in drainage systems that are typically openings in the wall of a manhole, storage facility or control gate
4. Weirs - like orifices, are used to model outlet and diversion structures in a drainage system
5. Outlets - are flow control devices that are typically used to control outflows from storage units

SWMM links share the following properties:

• Reports
  • Show in Report (RptFlag, Boolean) - Adds the item to the report when the Some option is selected in the reports settings
• SWMM
  • Tag (Tag, String) - Optional category or classification
    Note: The TAG property can be used to store information referring to the typical section of the device, useful when importing an INP file into SOLIDOS using the command SWMMIMPORT
• Calculations
  • Flow (FlowAttr, Double) - Calculated flow passing through the link in the current simulation
  • Depth (DepthAttr, Double) - Water depth in the link in the current simulation
  • Velocity (VelocityAttr, Double) - Calculated velocity in the link in the current simulation
  • Volume (VolumeAttr, Double) - Calculated volume in the link in the current simulation
  • Capacity (CapacityAttr, Double) - Capacity (percentage of pipe filled) calculated for the link in the current simulation
  • Concentration (PolConAttr, Double) - Concentration of the first pollutant calculated in the link in the current simulation

Note: For SWMM to recognize a SOLIDOS device as a link, this must have in the definition of your Constructor, the tool corresponding to the type of link, for example the model below, implements a circular concrete pipe, which is recognized as conduit:

Note the penultimate item. It is he who will define the device as a conduit for the SWMM. Also note that the conduit properties that depend on the geometry/location of the device are defined in the properties of the Conduit Activity:

In addition, the Drainage Network that will be calculated using the SWMM engine must also be enabled. In the network properties, note:

This is required as it is not mandatory to use SWMM. Thus, if the above option is turned off, the SWMM properties are not "left over" on the devices