ICM

What is exported from InfoWorks ICM to SWMM5?


SWMM5 Network Export from ICM 8.5 Help File

InfoWorks ICM can export networks to SWMM5 data format.

To export to SWMM5 file:

  1. In the explorer window, right-click on the network to be exported.
  1. Select Export | to SWMM5 from the popup menu. The Select Network Version and Scenario Dialog will be displayed.
  1. In the Select Network Version and Scenario Dialog, choose which scenario is to be exported from the dropdown list. Select which version of the scenario is to be exported by clicking on the # button.
  1. Select the file to which the network is to be exported.
  1. Click on OK to export the file. The file will be saved with a default file extension .inp.

Alternatively, with a network open select Export | To SWMM5 files… from the Network menu. (When using this method, the latest version of the current scenario will be exported.)

This topic contains the following sections detailing export of InfoWorks ICM data to SWMM5 data format:

Exporter Limitations

The exporter currently supports asset data and export to the DWF section of the SWMM5 data file only.

The table below lists the SWMM5 sections that are not exported and the reason that the section is not exported:

SWMM5 section Exporter Limitation
Raingages

Evaporation

Temperature

Inflows

Patterns

Timeseries

Event Data – the exporter currently supports asset data only (with the exception of DWF and RTK Hydrograph data).
Pollutants

Landuses

Coverages

Buildup

Washoff

Erosion

Sediment

Treatment

Loadings

SWMM quality modelling is not directly equivalent to quality modelling in InfoWorks ICM
Report

Files

Dividers

No InfoWorks ICM equivalent
Snowmelt

Snowpack

Not currently supported
Groundwater

Aquifers

SWMM Groundwater modelling is not directly equivalent to groundwater modelling in InfoWorks ICM

General

The network description on the Description Page of the network Property Sheet is exported to the TITLE section of the SWMM5 file.

Options

The SWMM5 OPTIONS section defines system properties and analysis options. The majority of options are not set on export and will be set to the SWMM5 default values.

The following options are set on export:

  • Flow Units
  • Infiltration
  • Allow Ponding

Flow Units

InfoWorks ICM networks are exported to SWMM5 data files with units based on the flow units that the user currently has set in InfoWorks ICM.

InfoWorks ICM Flow Unit SWMM5 Flow Unit
m3/s CMS
ft3/s CFS
l/s LPS
MGD MGD
US Gal/min GPM

Infiltration

SWMM supports one runoff volume model per network. If more than one of the SWMM5 infiltration models is used in the InfoWorks ICMnetwork, the exporter sets the Infiltration field to MIXED. This will generate an error message in SWMM5. Infiltration parameters will not be exported to the SWMM5 INFILTRATION section.

Runoff volume models in SWMM can be: Horton (exported as "HortonSWMM"), Green-Ampt or Curve Number. Any other InfoWorks ICM runoff volume models are exported as "HortonSWMM". If more than one runoff volume model is used in the InfoWorks ICM network, Infiltration parameters will be exported as zero to the SWMM5 INFILTRATION section.

Allow Ponding

This field is set to NO if the flood type for manhole nodes is set to "LOST", or YES if the flood type is "STORED".

If there is a mixture of "STORED" and "LOST" flood types in the network, this field will be set to YES, and a warning message will be exported to the SWMM5 file.

Subcatchments

Subcatchment information is exported to the SUBCATCHMENTS and DWF sections of the SWMM5 file.

Runoff Surface information is exported to the SUBAREAS and INFILTRATION sections of the SWMM5 file.

RTK Hydrograph information is exported to the HYDROGRAPHS and RDII sections of the SWMM5 file.

Subcatchment data field mapping

Field mappings and conversions of InfoWorks ICM Subcatchment fields to SWMM5 SUBCATCHMENT fields:

SWMM5 Parameter InfoWorks ICM Export
Name Subcatchment ID
Raingage Rainfall Profile
Outlet Node ID
Area Total Area
%Imperv %Imperv = 100 x (Sareaimp/ Sareas)

where:

Sareaimp = sum of surface areas of type impervious

Sareas = sum of surface areas

(The exporter treats surfaces of type "unknown" as pervious for the purposes of calculating %Imperv)

Width Dimension
Slope Slope
Clength Zero

(There is no equivalent in InfoWorks ICM to this field)

Runoff Surface Runoff Surface information is exported to the SUBAREAS section of the SWMM5 file.

DWF Data Field Mapping

Data is exported to the DWF section of the SWMM5 file for subcatchments with non-zero Additional Foul Flow or non-zero Population fields.

Note: Patterns are not exported for the dry weather flow profile names created. These must be created in SWMM.

Field mappings and conversions of InfoWorks ICM Subcatchment fields to SWMM5 DWF fields:

SWMM5 Parameter InfoWorks ICM Export
Node Node ID
Item FLOW
Value For subcatchments with non-zero Additional Foul Flow:

  • Additional Foul Flowvalue (exported to SWMM5 units)

For subcatchments with non-zero Population:

  • Population value
Pat 1 For subcatchments with non-zero Additional Foul Flow:

  • MONTHLY_AFF_<wastewater profile>

For subcatchments with non-zero Population:

  • MONTHLY_POP_<wastewater profile>
Pat 2 For subcatchments with non-zero Additional Foul Flow:

  • HOURLY_AFF_<wastewater profile>

For subcatchments with non-zero Population:

  • HOURLY_POP_<wastewater profile>
Pat 3 For subcatchments with non-zero Additional Foul Flow:

  • WEEKEND_AFF_<wastewater profile>

For subcatchments with non-zero Population:

  • WEEKEND_POP_<wastewater profile>
Pat 4 Not used.

Subarea data field mapping

Field mappings and conversions of InfoWorks ICM Runoff Surfaces fields to SWMM5 SUBAREA fields:

SWMM5 Parameter InfoWorks ICM Export
Subcatch Subcatchment ID
Imperv_N Runoff Routing Value for Impervious surfaces using SWMM Routing Model.

If more than one surface is Impervious, the value exported is an average weighted by surface area.

If Routing Model is not SWMM, Imperv_N exported as zero.

Perv_N Runoff Routing Value for Pervious surfaces using SWMM Routing Model.

If more than one surface is Pervious, the value exported is an average weighted by surface area.

If Routing Model is not SWMM, PervN exported as zero.

Imperv_S Initial Loss Value for Impervious surfaces.

Slope related values are converted to absolute values.

If more than one surface is Impervious, the value exported is an average weighted by surface area.

Perv_S Initial Loss Value for Pervious surfaces.

Slope related values are converted to absolute values.

If more than one surface is Pervious, the value exported is an average weighted by surface area.

PctZero Percent of impervious area with no depression storage:

PctZero = Sum of areas of Impervious surfaces with no initial loss/Sum of areas of impervious surfaces

RouteTo OUTLET

Infiltration

Infiltration parameters on the Runoff Surfaces tab of the subcatchments grid are exported to the INFILTRATION section of the SWMM5 file.

The Subcatchment ID is exported to the SWMM5 Subcatch field. The export of infiltration parameters depends on the infiltration model being used. Infiltration parameters are exported as zero for any subcatchments that do not use the infiltration model defined in the OPTIONS section of the SWMM5 file.

Horton Infiltration

Field mappings and conversion of InfoWorks ICM Runoff Surface fields to SWMM5 INFILTRATION fields when using Horton Runoff Volume Type:

SWMM5 Parameter InfoWorks ICM Export
MaxRate Horton Initial
MinRate Horton Limiting
DecayRate Horton Decay
DryTime Horton Drying Time
MaxInfil Horton Max Infiltration Volume

Green-Ampt Infiltration

Field mappings and conversions of InfoWorks ICM Runoff Surface fields to SWMM5 INFILTRATION fields when using Green-Ampt Runoff Volume Type:

SWMM5 Parameter InfoWorks ICM Export
Suction Green Ampt Suction
Conduct Green Ampt Conductivity
InitDef Green Ampt Deficit

Curve Number Infiltration

Field mappings and conversions of InfoWorks ICM Runoff Surface fields to SWMM5 INFILTRATION fields when using SCS / CN Runoff Volume Type:

SWMM5 Parameter InfoWorks ICM Export
CurveNo Runoff Curve Number

When using SCS Runoff Volume Type, Storage depth is converted to CN using:

S = (1000/CN – 10) * 0.0254

where: S in meters

Conduct Zero
Regen Zero

RTK Hydrographs

RTK Hydrograph parameters on the RTK Hydrograph tab and applicable Monthly RTK Hydrograph tab of the subcatchments grid are exported to the HYDROGRAPHS section of the SWMM5 file.

For model networks which were created using an earlier version of InfoWorks ICM than version 8.0, and which have not been subsequently updated, then for cases where the RTK Hydrograph is associated with different rainfall profiles, a hydrograph will be exported for each rainfall profile that it is used with. This does not apply from version 8.0 onwards, as the same rainfall profile must be specified for all subcatchments that use the same RTK hydrograph.

SWMM5 Parameter InfoWorks ICM Export
Name RTK Hydrograph ID appended by rainfall profile number
Raingage Rainfall Profile to which RTK Hydrograph is applied
Month ALL (for RTK Hydrograph)

Appropriate Month(s) (for Monthly RTK Hydrograph)

R1, R2, R3 R1, R2, R3
T1, T2, T3 T1, T2, T3
K1, K2, K3 K1, K2, K3
Dmax1, Dmax2, Dmax3 Max depth – Short term, Max depth – Medium term, Max depth – Long term
Drec1, Drec2, Drec3 Recovery rate- Short term, Recovery rate- Medium term, Recovery rate- Long term
D01, D02, D03 Starting depth – Short term, Starting depth – Medium term, Starting depth – Long term

RDII section

RTK Hydrograph information is also exported to the RDII section of the SWMM5 file.

For model networks which were created using an earlier version of InfoWorks ICM than verison 8.0, and which have not been subsequently updated, then if there are two or more subcatchments draining to the same node that use RTK hydrographs, only one RTK hydrograph will be given as the property of the node exported to SWMM5. This does not apply from version 8.0 onwards, as only one RTK hydrograph can be specified for any subcatchment that drains to the same node.

SWMM5 Parameter InfoWorks ICM Export
Node Node ID of node to which subcatchment drains
UHGroup RTK Hydrograph associated with subcatchment draining to node
SewerArea Contributing Area of subcatchment draining to node

Nodes

Node data is exported to the JUNCTIONS, OUTFALLS or STORAGE section of the SWMM5 file, depending on the type of node.

Field mappings and conversions of InfoWorks ICM node fields to SWMM5 node fields:

SWMM5 Parameter InfoWorks ICM Export
Name Node ID
InvertEl Chamber Floor Level
MaxDepth MaxDepth = Ground LevelChamber Floor Level
InitDepth Exported as Zero.

(There is no equivalent in InfoWorks ICM, as InfoWorks ICM automatically initialises levels.)

Manhole / Break Nodes

Manhole and break node data is exported to the Junctions section of the SWMM5 file.

SWMM5 Parameter InfoWorks ICM Export
SWMM5 Parameter InfoWorks ICM Export
SurDepth Lost/Stored Flood Type = Zero

Sealed Manholes = 999 m (3277.6 ft)

Ponded Area Floodable Area

Outfalls

All outfalls are exported as FREE outfalls with NO flap gate.

Outfall node data is exported to the Outfalls section of the SWMM5 file.

Storage Nodes

Storage node data is exported to the Storage section of the SWMM5 file.

Storage Nodes are exported as Type TABULAR. The Level/Plan Area Grid defining the shape of the storage node on the Storage Parameters Page of the Node Property Sheet is exported to the Curvessection of the SWMM5 file. The Table name is exported as the Storage Node ID.

Links

Link data is exported to the CONDUITS section of the SWMM5 file.

Common Link data fields:

SWMM5 Parameter InfoWorks ICM Export
Name Link ID
Node1 US Node ID
Node2 DS Node ID

Conduits

Conduit data is exported to the CONDUITS section of the SWMM5 file.

The cross-section data for conduits is defined in the XSECTION section of the SWMM5 file.

The upstream and downstream headloss coefficients of a conduit are exported to the LOSSESsection of the SWMM5 file.

SWMM5 Parameter InfoWorks ICM Export
Length Length
Nvalue Top Roughness

(A warning message will be generated in the exported SWMM5 text file if the Top Roughness differs from the Bottom Roughness)

Colebrook-White values are converted to N by:

N = 0.038 x ks1/6

where: ks in metres

Hazen-Williams values are converted to N by:

Where: conduit_height is in ft

(If conduit gradient is zero, the above equation will fail. For conduits with zero gradient, a gradient value of 0.0001 will be used for conversion purposes.)

Zup US Invert LevelChamber Floor Level (US Node)
Zdown DS Invert LevelChamber Floor Level (DS Node)
InitFlow Zero

Flap Valves

Flap valves are exported to the CONDUITS section of the SWMM5 file. Flap Valves are exported with a nominal length of 1m (3.28ft). Backflow is prevented by including an entry in the LOSSESsection.

The cross-section data for flap valves is defined in the XSECTION section of the SWMM5 file.

Pumps

Pump On and Off levels are exported as CONTROLS.

Field mappings and conversions of InfoWorks ICM Pump data to SWMM5 PUMP fields:

SWMM5 Parameter InfoWorks ICM Export
CurveName Pump ID

(The Head Discharge table is exported to the CURVES section of the SWMM5 file.)

InitStatus This is not exported as it is event data.

SWMM5 default value = ON

Orifices / Sluice Gates

All orifices and sluice gates are exported as an orifice of Type SIDE with NO flap gate.

Orifice and Sluice Gate data is exported to the ORIFICE section of the SWMM5 file.

The geometry of the orifice opening is defined in the XSECTION section of the SWMM5 file.

Field mappings and conversions of InfoWorks ICM Orifice and Sluice Gate data to SWMM5 ORIFICE fields:

SWMM5 Parameter InfoWorks ICM Export
Type SIDE
Height Height = Invert LevelChamber Floor Level (US node)
Cd
Flap Gate NO

Weirs

The geometry of the weir opening is defined in the XSECTION section of the SWMM5 file.

Field mappings and conversions of InfoWorks ICM Weir data to SWMM5 WEIRS fields:

SWMM5 Parameter InfoWorks ICM Export
Type
InfoWorks ICMWeir Type SWMM5 Type
BRWEIR UNKNOWN
COWEIR TRANSVERSE
TRIWEIR TRAPEZOIDAL
VCWEIR TRANSVERSE
VNWEIR TRANSVERSE
VWWEIR TRANSVERSE
WEIR TRANSVERSE
Height CrestChamber Floor Level (US node)
Cd Discharge Coefficient
Flap Gate NO
EC Zero for all types

Outlets

User defined links, culvert inlet, culvert outlet, flume, screen and siphon links are exported to the OUTLETS section of the SWMM5 file.

Field mappings and conversions of InfoWorks ICM link data to SWMM5 OUTLETS fields:

SWMM5 Parameter InfoWorks ICM Export
Height Crest or Invert LevelChamber Floor Level (US node)
Discharge Curve TABULAR
Qtable Link ID

Please Note

The Head Discharge table for User Defined Links is exported to the Curves section of the SWMM5 file. H-Q curves must be defined by the user for all other Link types exported as outlets.

Flap Gate NO

River Channel Sections

River channel sections are exported to the CONDUITS section of the SWMM5 file.

The cross-section geometry of channel river sections is defined in the XSECTION and TRANSECTS sections of the SWMM5 file.

Cross Sections

Cross Section data for conduits, river channels, orifices, sluices, flap valves and weirs are exported to the XSECTION section of the SWMM5 file.

For regular shaped sections:

SWMM5 Parameter InfoWorks ICM Export
Link Link ID
Shape See Shape Table below.
Geom1 Height

Diameter for Flap Valves

Geom2 Width
Geom3 Left Side Slope for Trapezoidal sections

0.249328 for Trapezoidal Weirs

Zero for all other shapes

Geom4 Right Side Slope for Trapezoidal sections

Zero for all other shapes

For river channel sections:

SWMM5 Parameter InfoWorks ICM Export
Link Link ID
Shape IRREGULAR
Transect Link ID

Cross Section Shape Types

InfoWorks ICMLink Type SWMM5 Shape
Conduit
InfoWorks ICM Shape ID SWMM5 Shape
ARCH MODBASKETHANDLE
CIRC CIRCULAR
CNET UNKNOWN
EGG EGG
EGG2 UNKNOWN
OEGB UNKNOWN
OEGN UNKNOWN
OREC RECT_OPEN
OTx:y TRAPEZOIDAL
OU UNKNOWN
OVAL UNKNOWN
RECT RECT_CLOSED
UTOP RECT_ROUND
User UNKNOWN

If there is no SWMM5 equivalent to the CS Shape ID, a Shape of "UNKNOWN" is exported. This will create an error message in SWMM5 when the file is opened.

Flap Valve CIRCULAR
Orifice CIRCULAR
Sluice Gate RECT_CLOSED
Weir
InfoWorks ICMWeir Type SWMM5 Shape
BRWEIR RECT_OPEN
COWEIR RECT_OPEN
TRIWEIR TRAPEZOIDAL
VCWEIR RECT_OPEN
VNWEIR TRIANGULAR
VWWEIR RECT_OPEN
WEIR RECT_OPEN

Transects

The cross-section geometry of river channel sections is exported to the TRANSECTS section of the SWMM5 file.

Field mappings and conversions of InfoWorks ICM river channel data to SWMM5 TRANSECTS fields:

SWMM5 Parameter InfoWorks ICM Export
Nleft Rough.

The roughness value in the Cross-Section grid up to the first panel marker

Nright Rough.

The roughness value in the Cross-Section grid after the last panel marker

Nchannel Rough.

The roughness value in the Cross-Section grid between panel markers

Name Channel Link ID
Nsta Number of entries in River Channel Cross-Section grid
Xleft The X Coord. value in the Cross-Section grid of the first section that has a new panel set.

If there are no panel markers, this is the first X value in the grid.

Xright X Coord.

The X Coord. value in the Cross-Section grid of the last section that has a new panel set.

If there are no panel markers, this is the last X value in the grid.

Wfactor Zero
Eoffset US Invert Level
Station(n) X Coord.

The X Coord. value in the Cross-Section grid for grid entry (n), where (n) = 1 to Nsta.

Elevation(n) Depth

The Depth value in the Cross-Section grid for grid entry (n), where (n) = 1 to Nsta.

Minor Losses

The upstream and downstream headloss coefficients of a conduit are exported to the LOSSES section of the SWMM5 file. Entries are also included for flap valves to prevent backflow in the conduit.

SWMM5 Parameter InfoWorks ICM Export
Conduit Conduit ID
EntryLoss US Headloss Coefficient

For Headloss Type of NORMAL or HIGH, the headloss coefficient is multiplied by 0.15.

ExitLoss DS Headloss Coefficient

For Headloss Type of NORMAL or HIGH, the headloss coefficient is multiplied by 0.015

AvgLoss Zero
FlapGate Conduit = NO

Flap Valve = YES

Controls

Pump On and Off levels are exported as controls.

Click on the image below to display the example.

Curves

Level/Plan Area grids for Storage Nodes are exported to the CURVES section of the SWMM5 file.

Head Discharge tables for Pumps and User Control Links are exported to the CURVES section of the SWMM5 file.

SWMM5 Parameter InfoWorks ICM Export
Name Link ID
Type
InfoWorks ICM Object SWMM5 Type
Storage Node STORAGE
FixPmp PUMP2
VSPmp PUMP2
RotPmp PUMP3
ScrPmp PUMP4
User Defined Link RATING
X(n)
SWMM5 Type InfoWorks ICM Export
STORAGE X(n) = Level(n) – Level(n=1)

where: n = grid entry on Level/Plan Area grid

PUMP2 X = Zero
PUMP3, PUMP4, RATING X(n) = Head(n)

where: n = grid entry on Head Discharge grid

Y(n)
SWMM5 Type InfoWorks ICM Export
STORAGE Y(n) = Area(n)

where: n = grid entry on Level/Plan Area grid

PUMP2 Y = Discharge
PUMP3, PUMP4, RATING Y(n) = Discharge(n)

where: n = grid entry on Head Discharge grid

Coordinates

X and Y coordinates of nodes are exported to the COORDINATES section of the SWMM5 file.

X and Y coordinates of bends in links are exported to the VERTICES section of the SWMM5 file.

X and Y coordinates of vertices in polygons are exported to the POLYGONS section of the SWMM5 file.

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