SWMM5 Conversion - Links

Information from the following sections of the SWMM5 project file are imported to InfoWorks ICM Link objects:

[CONDUITS]
[PUMPS]
[ORIFICES]
[WEIRS]
[OUTLETS]
[XSECTIONS]
[TRANSECTS]
[LOSSES]
[VERTICES]

[CONDUITS] Section

SWMM5 Conduits are imported as InfoWorks ICM Conduits or Channels with the following properties:

US Headloss Type of Fixed
DS Headloss Type of Fixed (or Flap if a flap gate is present)
X and Y coordinates of bends as specified in the [VERTICES] section
US Headloss Coefficient and DS Headloss Coefficient determined from the [LOSSES] section
Link Type, Shape and geometry determined from the [XSECTIONS] section
Culvert code determined from the [XSECTIONS] section

The SWMM5 Conduit data is imported as described in the table below:

SWMM5	Description	InfoWorks ICM Data Field
Name	Conduit ID	Asset ID
Node1	Upstream Node ID	US Node ID
Node2	Downstream Node ID	DS Node ID
Length	Conduit Length	Length
N		Bottom Roughness Manning Top Roughness Manning If the roughness type selected on the Import Network from SWMM5 Data Dialog was Manning, roughness is imported as 1.0/N, otherwise roughness is imported as N.
Z1	Offset of upstream end of conduit invert above the invert elevation of its upstream node	US Invert Level = Z1 + Z Where Z is connecting node invert elevation. If LINK_OFFSETS in the [OPTIONS] section is defined as ELEVATION: US Invert Level = Z1
Z2	Offset of downstream end of conduit invert above the invert elevation of its downstream node	DS Invert Level = Z2 + Z Where Z is connecting node invert elevation. If LINK_OFFSETS in the [OPTIONS] section is defined as ELEVATION: DS Invert Level = Z2
Q0	Flow in conduit at start of simulation	User Number 1 (No InfoWorks ICM equivalent)

Conduit Cross Section Data - [XSECTIONS] Section

Conduit geometry and culvert code is determined from data in the SWMM5 [XSECTIONS] section.

SWMM5

Description

InfoWorks ICM Data Field

Link

Link ID

Determines to which conduit or channel the xsections data applies.

Shape

Cross Section Shape

Shape ID

The table below lists the SWMM5 shapes that are imported as standard InfoWorks ICM shapes:

SWMM5 Shape	InfoWorks ICM Shape ID	Conversion Notes
CIRCULAR	CIRC
FORCE_MAIN	CIRC	Solution Model field is set to ForceMain Roughness Type is set to HW Bottom roughness and Top roughness are set from Geom2. If FORCE_MAIN_EQUATION in the [OPTIONS] section is set to D-W, roughness values will be converted from D-W to Manning.
FILLED_CIRCULAR	CIRC	Sediment Depth is set to value in Geom2
RECT_CLOSED	RECT
RECT_OPEN	OREC

The table below lists the SWMM5 shapes that are imported as user defined shapes. Shapes unique to a specific conduit will have the conduit ID appended to the shape ID (denoted by an asterisk in the table).

SWMM5 Shape	InfoWorks ICM Shape ID
TRAPEZOIDAL	*SWMM_TRAPEZOIDAL
TRIANGULAR	*SWMM_TRIANGLE
HORIZ_ELLIPSE	SWMM_HORIZ_ELLIPSE
VERT_ELLIPSE	SWMM_VERT_ELLIPSE
ARCH	SWMM_SHAPE_ARCH
PARABOLIC	*SWMM_PARABOLIC
POWER	*SWMM_POWER
RECT_TRIANGULAR	*SWMM_RECT_TRIANGLE
RECT_ROUND	*SWMM_RECT_ROUND
MODBASKETHANDLE	*SWMM_MOD_BASKET_HANDLE
EGG	SWMM EGG
HORSESHOE	HORSESHOE
GOTHIC	SWMM_GOTHIC
CATENARY	SWMM_CATENARY
SEMIELLIPTICAL	SWMM_SEMIELLIPTICAL
BASKETHANDLE	BASKETHANDLE
SEMICIRCULAR	SWMM_SEMICIRCULAR

Geom1

Geometry data 1

Height

Geom2

Geometry data 2

Width

Bottom Roughness and Top Roughness for FORCE_MAIN shapes.

Sediment Depth for FILLED_CIRCULAR shapes.

Geom3

Geometry data 3

Used to determine user defined shapes for TRAPEZOIDAL, POWER, RECT_TRIANGULAR and RECT_ROUND shapes.

Geom4

Geometry data 4

Used to determine user defined shapes for TRAPEZOIDAL shapes.

Barrels

Number of parallel pipes of equal size, slope, and roughness associated with a conduit

Number of links equal to the number of barrels specified are created.

Curve

Name of Curve in the [CURVES] section that defines how width varies with depth

The curve identified is added as a user defined InfoWorks ICM Shape.

Tsect

Name of an entry in the [TRANSECTS] section that describes the cross-section geometry of an irregular channel

If a SWMM5 conduit has an entry in the [TRANSECTS] section, the conduit will be imported as an InfoWorks ICM Channel object with associated Channel Shape. The information from the [TRANSECTS] section is imported into the Channel Profile grid of the Channel Shape as follows:

SWMM5	Description	Conversion Notes
Nleft	Manning’s n of left overbank portion of channel	Rough. (up to left panel marker)
Nright	Manning’s n of right overbank portion of channel	Rough. (from right panel marker)
Nchanl	Manning’s n of main channel portion of channel	Rough. (between left and right panel markers)
Name	Transect ID	Used to identify to which channel the data applies
Nsta	Number of stations across cross-section	Number of entries in Channel Profile grid
Xleft	Station position which ends the left overbank portion of the channel	Position of left bank panel marker
Xright	Station position which begins the right overbank portion of the channel	Position of right bank panel marker
Wfactor	Factor by which distances between stations should be multiplied	Multiplies X Co-ordinates by Wfactor value
Eoffset	Amount added to the elevation of each station	Not used
Elev	Elevation of the channel bottom at a cross-section station relative to some fixed reference	Depth
Station	Distance of a cross-section station from some fixed reference	X Coord

Culvert

Culvert code.

If SWMM5 Culvert has a code other than 0, Culvert code is set to the imported code.

Conduit type

If SWMM5 Culvert is 0, the Conduit type is set to Conduit.

If SWMM5 Culvert has a code other than 0, the Conduit type is set to Culvert.

[LOSSES] Section

Conduit upstream and downstream headloss cofficients are determined from data in the SWMM5 [LOSSES] Section:

SWMM5	Description	InfoWorks ICM Data Field
Conduit	Conduit ID	Used to identify to which conduit the data applies
Kentry	If Culvert is imported from the SWMM5 [XSECTIONS] section, Kentry is imported as the inlet headloss coefficient.	Inlet Headloss coefficient
Kentry	If Culvert is not imported from the SWMM5 [XSECTIONS] section, Kentry is imported as the upstream head loss coefficient	US Headloss coefficient
Kexit	If Culvert is imported from the SWMM5 [XSECTIONS] section, Kexit is imported as the outlet headloss coefficient.	Outlet Headloss coefficient
Kexit	If Culvert is not imported from the SWMM5 [XSECTIONS] section, Kexit is imported as the downstream headloss coefficient	DS Headloss coefficient
Kavg	Average minor head loss coefficient across length of conduit	US Headloss coefficient if Kentry is not set DS Headloss coefficient if Kexit is not set and Flap is set to NO.
Flap	Indicates whether a flap valve is present to prevent reverse flow	If Flap is set to YES: DS Headloss Coefficient is set to 1.0 DS Headloss Type is set to Flap
SeepRate	Uniform seepage rate along the bottom and sloped sides of conduit	Infiltration loss from base coefficient

[PUMPS] Section

SWMM5 Pumps are imported as an InfoWorks ICM Pump of link type determined by data in the [CURVES] section.

The SWMM5 Pump data is imported as described in the table below:

SWMM5	Description	InfoWorks ICM Data Field
Name	Pump ID	Asset ID
Node1	Name of node on inlet side of pump	US Node ID
Node2	Name of node on outlet side of pump	DS Node ID
PCurve	Name of pump curve	Used to determine type of pump and Head Discharge curve details from the [CURVES] section. If there is no curve data, the pump is an 'Ideal' pump, for which there is no InfoWorks ICM equivalent. An invalid fixed discharge pump will be created.
Status	Status at start of simulation	User Text 1 (No InfoWorks ICM equivalent)
Startup	Depth at inlet node when pump turns on	Switch on level = Startup + Z Where Z is Chamber Floor Level of upstream node.
Shutoff	Depth at inlet node when pump shuts off	Switch off level = Shutoff + Z Where Z is Chamber Floor Level of upstream node.

Pump Curve Details - [CURVES] section

SWMM5

Description

Conversion Notes

Name

Pump ID

Used to identify to which pump curve data applies.

Type

SWMM5 Type	Description
Type 1	An off-line pump with a wet well where flow increases incrementally with available wet well volume
Type 2	An in-line pump where flow increases incrementally with inlet node depth
Type 3	An in-line pump where flow varies continuously with head difference between the inlet and outlet nodes
Type 4	A variable speed in-line pump where flow varies continuously with inlet node depth

Link Type

SWMM5 Type	InfoWorks ICM Link Type
Type 1	Fixpmp
Type 2	Fixpmp
Type 3	Rotpmp
Type 4	Scrpmp

x-value

Pump outflow

Head Discharge Table

See Pump Conversion section below.

y-value

SWMM5 Type	x-value	y-value
Type 1	pump outflow	increment of inlet node volume
Type 2	pump outflow	Increment of inlet node depth
Type 3	pump outflow	Head difference between outlet and inlet nodes
Type 4	pump outflow	Continuous depth

Head Discharge Table

See Pump Conversion section below.

Pump Conversion

If Pump Type = 1 the importer uses the inlet node geometry to convert volumes to levels.

For Pump Type = 1 and 2 the importer creates a fixed pump for each distinct discharge value. The number of fixed discharge pumps is equal to the number of entries in the Curves section.

Pump Type 3 is imported as a rotodynamic pump. The importer creates a Head Discharge Table from the SWMM5 Curve x, y values. The order of data entries in the SWMM5 curve is reversed, as InfoWorks ICM expects descending heads. If there is no Q=0 value specified in the SWMM5 curve, InfoWorks ICM calculates a head value at Q=0 by extrapolation.

Pump Type 4 is imported as an InfoWorks ICM Archimedean screw pump. The importer creates a Head Discharge Table from the SWMM5 Curve x, y values. If there is no Q=0 value specified in the SWMM5 curve, InfoWorks ICM calculates a head value at Q=0 by extrapolation.

[ORIFICES] Section

SWMM5 Orifices are imported as an InfoWorks ICM Orifice or InfoWorks ICM Sluice depending on the shape of the SWMM5 Orifice as defined in the [XSECTIONS] section.

The SWMM5 Orifice data is imported as described in the table below:

SWMM5	Description	InfoWorks ICM Data Field
Name	Orifice ID	Asset ID
Node1	Name of node on inlet end of orifice	US Node ID
Node2	Name of node on outlet end of orifice	DS Node ID
Type	Orientation of orifice: either SIDE or BOTTOM	User Text 1 (No InfoWorks ICM equivalent)
Offset	Amount that a orifice is offset above the invert of inlet node	Invert Level = Offset + Z Where Z is upstream node invert elevation. If LINK_OFFSETS in the [OPTIONS] section is defined as ELEVATION: Invert Level = Offset
Cd	Discharge Coefficient	Discharge Coefficient calculated as: Cd√2
Flap	Indicates whether a flap valve is present to prevent reverse flow	SWMM5 orifice is imported as an InfoWorks ICM Orifice or Sluice according to shape defined in [XSECTIONS] section (see below). If Flap is set to YES, SWMM5 orifice is imported with a Flap Valve downstream of the Orifice or Sluice. The invert level of the Flap Valve will be the invert level of the Orifice/Sluice. The diameter of the Flap Valve will be the diameter of the Orifice or the width of the Sluice.
Orate	Time to open a fully closed orifice	User Number 1 (No InfoWorks ICM equivalent)

Orifice Cross Section Data - [XSECTIONS]

Orifice geometry is determined from data in the SWMM5 [XSECTIONS] Section:

SWMM5

Description

InfoWorks ICM Data Field

Link

Orifice ID

Used to determine to which orifice object cross section data applies.

Shape

CIRCULAR or RECT_CLOSED

Imported as follows:

SWMM5 Shape	InfoWorks ICM Object
CIRCULAR	Orifice
RECT_CLOSED	Sluice

Geom1

Diameter of a circular orifice

Full Height of a rectangular orifice

Imported as follows:

SWMM5 Shape	InfoWorks ICM Object	InfoWorks ICM Data Field
CIRCULAR	Orifice	Diameter
RECT_CLOSED	Sluice	Opening Height

Geom2

Top Width of a rectangular orifice

Sluice width

[WEIRS] Section

SWMM5 Weir objects are imported as an InfoWorks ICM Weir with width as defined in the [XSECTIONS] section.

The SWMM5 Weir data is imported as described in the table below:

SWMM5

Description

InfoWorks ICM Data Field

Name

Weir ID

Asset ID

Node1

Name of node on inlet side of weir

US Node ID

Node2

Name of node on outlet side of weir

DS Node ID

Type

Transverse, Sideflow, V-notch or Trapezoidal

Link Type

SWMM5 Type	InfoWorks ICM Link Type
Transverse	Weir	Diameter
Sideflow	Weir	Opening Height
V-notch	VNWeir
Trapezoidal	TRWeir

Offset

Amount that the weir crest is offset above the invert of inlet node

Crest Level = Offset + Z

For side weirs:

Crest Level = (offset5/3)2/3+Z

Where Z is upstream node invert elevation.

If LINK_OFFSETS in the [OPTIONS] section is defined as ELEVATION:

Crest Level = Offset

For side weirs:

Crest Level = (offset5/3)2/3

Weir Discharge Coefficient

Discharge Coefficient

calculated as:

SWMM5 Type	InfoWorks ICM Discharge Coefficient
Transverse	Cd/√g	Diameter
Sideflow	Cd/√g	Opening Height
V-notch	(15/8 Cd)/√(2g)
Trapezoidal	Stored in User Number 1 field. (No InfoWorks ICM equivalent)

Flap

Indicates whether a flap valve is present to prevent reverse flow

SWMM5 Weir is imported as an InfoWorks ICM Weir.

If Flap is set to YES, SWMM5 weir is imported with a Flap Valve downstream of the InfoWorks Weir. The invert level of the Flap Valve will be the crest of the Weir. The diameter of the Flap Valve will be the width of the Weir.

Number of end contractions for TRANSVERSE or TRAPEZOIDAL weir

Number of Notches

Cd2

Discharge coefficient for triangular ends of a TRAPEZOIDAL weir

User Number 1

(No InfoWorks ICM equivalent)

Weir Cross Section Data - [XSECTIONS]

Weir geometry is determined from data in the SWMM5 [XSECTIONS] Section:

SWMM5

Description

InfoWorks ICM Data Field

Link

Weir ID

Used to determine to which weir object cross section data applies.

Shape

SWMM5 Weir Type	SWMM5 Shape
Transverse	RECT_OPEN
Sideflow	RECT_OPEN
V-notch	TRIANGULAR
Trapezoidal	TRAPEZOIDAL

Geom1

Full Height

Notch height for InfoWorks ICM VNWeir or TRWeir.

Otherwise, not imported - not equivalent to InfoWorks ICM Height.

Geom2

Top Width

Width

[OUTLETS] Section

SWMM5 Outlet objects are imported as an InfoWorks ICM User Control object of type Compnd.

The SWMM5 Outlet data is imported as described in the table below:

SWMM5

Description

InfoWorks ICM Data Field

Name

Outlet ID

Asset ID

Node1

Name of node on inlet end of link

US Node ID

Node2

Name of node on outlet end of link

DS Node ID

Offset

Amount that the outlet is offset above invert of inlet node

Initial Level = Offset + Z

Where Z is upstream node invert elevation.

If LINK_OFFSETS in the [OPTIONS] section is defined as ELEVATION:

Initial Level = Offset

Qcurve

Name of rating curve that describes outflow rate as a function of head across the outlet for a TABULAR outlet.

Rating curve is defined in the [CURVES] section.

A Head Discharge Table is created with a name based on the SWMM5 Name. Values to be imported into the head array and discharge array in the Head Discharge Table are determined from curve data in the SWMM5 [CURVES] section.

SWMM5 Curve Field	InfoWorks ICM Head Discharge Table
Name	Used to determine which curve is to be applied to the User Control.
Type
Outlet Flow	Discharge
Head	Head

Coefficient of power function that relates outflow (Q) to head across the link (H) for a FUNCTIONAL outlet

Q=C1(H)C2

A 15 point Head Discharge Table is created with a name based on the SWMM5 Name.

Table entries are calculated using the functional relationship:

Q=C1(H)C2

Exponent of power function that relates outflow (Q) to head across the link (H) for a FUNCTIONAL outlet

Q=C1(H)C2

Flap

Indicates whether a flap valve is present to prevent reverse flow

If Flap is set to YES, for Head values < 0 in the Head Discharge Table, Discharge will be set to zero.

SWMM5 Conversion Notes

Importing SWMM5 Network Data

SWMM5 Conversion - Nodes

SWMM5 Conversion - Subcatchments