7.6. Generate SWMM File

7.6.1. SWMM Create Input

  • By default, the plugin extracts the entire primary wastewater structures. If you check Export only selected network, then both the selected primary and secondary network will be exported.

  • The .inp file is the input file format for SWMM. It contains the wastewater network AND simulation parameters. The network can be extracted from the QGEP data, but the simulation parameters must be set according to your study.

  • The simulation parameters are copied from a provided template .inp file. A default file is provided in the plugin folder in src\swmm_templates\default_qgep_swmm_parameters.inp, but you can create and use your own template file.

  • By default, the export supposes that you use an Horton Infiltration method. If another method is set in the template .inp, you might need to adapt the generated .inp. See the linked issue

7.6.1.1. QGEP plugin

Launch SWMM Create Input:

  • Database: the name of the service used to connect to the database

  • State: Current or Planned: extract the wastewater structure according to the status

  • Template INP file: a .inp from which simulation parameters will be copied

  • Destination INP file: the .inp generated from QGEP data

  • Export only selected network: Export primary and secondary selected network

7.6.2. Selection

Usually you will select a subnetwork to be exported with the QGEP button Upstream and then Select current path. If you want to remove from this selection secondary structures:

  • Open Selection by expression on the layer vw_qgep_reach

  • Expression: "ch_function_hierarchic"  in (5066, 5068, 5069, 5070, 5064, 5071, 5062, 5072, 5074)

  • Choose: filter current selection

  • Open Selection by expression on the layer vw_qgep_wastewater_structure

  • Expression: "_channel_function_hierarchic" in (5066, 5068, 5069, 5070, 5064, 5071, 5062, 5072, 5074)

  • Choose: filter current selection

7.6.3. Change default export parameters

As mentionned earlier, most of the simulation parameters are copied from the template .inp file.

Remaining default parameters are currently hard coded in the views within the database qgep_swmm schema. The defaults parameters can be edited directly in the view (with PgAdmin).

Nota

The default parameters modified in the views and modified views in general will be overwritten during a datamodel update.