7.5. QGEP-SWMM data requirements

To run a sucessful simulation in SWMM the following minimal data has to be filled in to be matched to the swmm objects

JUNCTIONS and COORDINATES

SWMM attribute

Description

QGEP equivalent

Name

User-assigned junction name.

wastewater_node.obj_id

X-Coordinate / Y-Coordinate

Coordinate of node [COORDINATES]

wastewater_node.situation_geometry

Description

Description of node

wastewater_structure.identifier

Tag

Optional label used to categorize or classify the junction.

manhole.obj_id

Invert El.

Invert elevation of the junction

wastewater_node.bottom_level

Max. Depth

Maximum depth at the junction (i.e., the distance from the invert to the ground surface) (feet or meters). If zero, then the distance from the invert to the top of the highest connecting link will be used.

Difference of cover.level minus wastewater_node.bottom_level

CONDUITS

SWMM attribute

Description

QGEP equivalent

Name

User-assigned conduit name.

wastewater_node.obj_id

Inlet Node

Name of node on the inlet end of the conduit (which is normally the end at higher elevation).

from wastewater_node.obj_id

Outlet Node

Name of node on the outlet end of the conduit (which is normally the end at lower elevation).

from wastewater_node.obj_id

Description

Description of conduit

wastewater_networkelement.identifier

Tag

Optional label used to categorize or classify the conduit.

wastewater_networkelement.fk_wastewater_structure

Max. Depth

Maximum depth of the conduit’s cross section

Difference of Cover.level minus Wastewater_node.bottom_level

Length

Conduit length

reach.length_effective or calculated from reach.progression_geometry if length_effective is empty

Roughness

Manning’s roughness coefficient.

reach.wall_roughness

InletOffset

Depth or elevation of the conduit invert above the node invert at the inlet end of the conduit

reach_point_from.level minus from_wastewater_node.bottom_level

OutletOffset

Depth or elevation of the conduit invert above the node invert at the outlet end of the conduit

reach_point_to.level minus to_wastewater_node.bottom_level

XSECTIONS

SWMM attribute

Description

QGEP equivalent

Shape

geometric properties of the conduit’s cross section e.g. CIRCULAR.

pipe_profile.profile_type

Geom1

Maximum height of conduit

reach.clear_height/1000 [m] to [mm]