Importing InfoWorks RS Network Data

InfoWorks RS Object	InfoWorks ICM Object	Conversion Notes
River Sections Replicated sections Interpolated sections Links between sections Lateral Spills Junction nodes	River Reach Cross Section Line Bank Line	Imported to an InfoWorks ICM River Reach. Spills and sections are also imported as River Lines to allow modifications to section data. See below for details.
Inline Spill	Bank Line Inline Bank	InfoWorks RS Spill Units connected by in-line spill links are imported as InfoWorks ICM Bank Line and Inline Bank objects: The geometry of the spill unit is imported as a Bank Line An Inline Bank link is created between the points where the spill was connected into the InfoWorks RS model. The geometry of the spill unit is imported into the River bank section editor of the Inline Bank. The exception to the above are in-line spill units associated with a bridge (see below).

River Reach Import

InfoWorks RS river sections, links and lateral spills are imported to an InfoWorks ICM River Reach.

RS River sections and links are assembled into an InfoWorks ICM reach as follows:

1. Upstream and downstream nodes of the RS reach are imported as InfoWorks ICM break nodes.
2. RS river section nodes along the reach are imported as river reach sections in the InfoWorks ICM river reach.
3. RS links connecting RS river section nodes are imported as a InfoWorks ICM river reach link.

4. RS junction nodes are imported as break nodes. Any river reach that is connected to a junction will be connected to the break node corresponding to the junction, rather than getting its own break node. Connectivity link geometry will not be imported.

5. RS interpolate nodes are imported as a section interpolated from the sections upstream and downstream of the interpolate node. A break node is inserted at the node location, splitting the river reach and the new section is used as both the upstream section of the downstream reach and the downstream section of the upstream reach.
6. RS replicate nodes are imported by copying the previous river section node. Elevations are calculated by subtracting the Drop in Bed Level value from the river section elevation values.
7. Roughness type is set to N (Manning's n)

A Cross Section Line object is also imported for each InfoWorks RS section to allow modifications to section data in InfoWorks ICM.

Banks

InfoWorks RS lateral spill units are used to form the left and right banks of an InfoWorks ICM River Reach.

A Bank Line object is also imported for each InfoWorks RS spill unit to allow modifications to bank section data in InfoWorks ICM.

Splitting Reaches

It is not always possible to import linked InfoWorks RS river sections as one continuous InfoWorks ICM river reach.

Reaches are split whenever:

• spills start spilling into a different object
• a line of spills on either bank begins or ends
• an interpolate node is encountered

The river reach link is split at the relevant section and a break node is inserted. The section at the split location is copied so that it is used at both the upstream section of the downstream reach and the downstream section of the upstream reach.

InfoWorks RS USBPR and Arch bridge information is used to generate InfoWorks ICM Bridge and Cross section line objects.

• A Bridge link is created between upstream and downstream nodes:
  • The link will be created between remote upstream and remote downstream river section nodes if these exist.
  • If the RS bridge does not reference an upstream / downstream river section node, the us / ds node will be used instead.
  • Unless there is a single RS spill unit associated with the bridge (see next point below), the US node ID of the RS bridge is imported into the Asset ID field of the Bridge link.
• If a single spill is connected between the upstream and downstream nodes of the bridge, the geometry of the InfoWorks RS spill unit is imported into the Bridge deck data of the Bridge:
  • The modular limit and weir coefficient of the InfoWorks RS spill unit are imported to the Modular limit and Discharge coefficient fields of the bridge deck data.
  • Bridge deck Roughness values are set to zero.
  • The object ID of the InfoWorks RS spill unit associated with the bridge is imported into the Asset ID field of the Bridge link.
  • A cross section line is also generated from the spill unit geometry.
• Upstream and downstream cross section lines are created:
  • If bridge deck data has been generated from a spill unit, the point of intersection with the bridge will be set at 2/3 of the distance between the connecting node and the deck. The cross section lines will be created parallel to the deck.
  • If bridge deck data has not been generated, the point of intersection with the bridge will be set at 1/3 and 2/3 of the distance along the bridge link. The cross section lines will be created parallel to the upstream/downstream river reach section.
  • The chainage at which the cross section line intersects the bridge link is set as the chainage at the minimum elevation.
• Openings are created from RS bridge opening data:
  • Openings are positioned midway between the left and right offsets of the cross sections
  • Shape ID is set to ARCHSPRUNG
  • Width is calculated as the difference between left and right offsets
  • Opening US invert level and DS invert level values are set as the lowest elevation in the RS bridge section data.
  • Height and Springing height are calculated from soffit height and spring height values relative to the US/DS invert level.
  • Note that pier information is not imported.
• If bridge deck data has not been generated from RS spill unit data a cross section line for the bridge deck is created:
  • The bearing of the cross section line is calculated as the average bearing between the river sections on each side.
  • Elevation is set as one meter above the highest of the max elevation of the RS bridge section data or the highest point of the bridge openings

The bridge building tools are then applied to generate bridge section data.

InfoWorks RS Object	InfoWorks ICM Object	Conversion Notes
Floodplain Section	Irregular Weir	InfoWorks RS Foodplain Sections are imported as InfoWorks ICM Irregular Weirs with the following mappings: InfoWorks RS field InfoWorks ICM field Node ID US Node ID, Asset ID Weir Coefficient Discharge coefficient Modular Limit Modular limit Section Data InfoWorks RS Cross Chainage and Z values are imported to InfoWorks ICM Chainage elevation fields.

Data from InfoWorks RS boundary nodes of event type Simple Runoff and PDM and their associated subcatchments are imported into InfoWorks ICM.

The geometry of subcatchments associated with other boundary node types is also imported.

InfoWorks RS Object	InfoWorks ICM Object	Conversion Notes
Storage Areas	Storage Node and associated Storage Area	InfoWorks RS storage areas are imported as an InfoWorks ICM Storage Node with associated Storage Area if the RS storage area has a polygon boundary defined. The Ground level of the Storage Node will be set to the lowest level in the Storage array. River reaches will be linked to Storage Nodes using the Left node ID and/or Right node ID fields as appropriate.

InfoWorks RS Object	InfoWorks ICM Object	Conversion Notes
All supported conduit types	Conduit	InfoWorks RS conduit nodes connected by links are imported as a single InfoWorks ICM Conduit (unless the roughness or shape changes or the pipe splits / meets a junction). Replicate / interpolations are translated as a duplicate of the upstream conduit. InfoWorks RS field InfoWorks ICM field ID of most upstream node US node ID ID of most downstream node DS node ID Invert Level of most upstream node US invert level Invert Level of most downstream node DS invert level Friction Type Roughness type RS model ICM model Manning N Colebrook-White CW Bottom Manning Bottom roughness Manning's n Top Manning Top roughness Manning's n Bottom Colebrook White Bottom roughness Colebrook-White Top Colebrook White Top roughness Colebrook-White
Circular Conduit	Conduit	InfoWorks RS Circular Conduits are imported as InfoWorks ICM Conduits with Shape ID set to CIRC. The following mappings are specific to circular conduits (see above for common mappings for all conduit types): InfoWorks RS field InfoWorks ICM field Diameter Width Height
Rectangular Conduit	Conduit	InfoWorks RS Rectangular Conduits are imported as InfoWorks ICM Conduits with Shape ID set to RECT. The following mappings are specific to rectangular conduits (see above for common mappings for all conduit types): InfoWorks RS field InfoWorks ICM field Conduit Width Width Conduit Height Height
Sprung Arch Conduit	Conduit	InfoWorks RS Sprung Arch Conduits are imported as InfoWorks ICM Conduits with Shape ID set to ARCHSPRUNG. The following mappings are specific to sprung arch conduits (see above for common mappings for all conduit types): InfoWorks RS field InfoWorks ICM field Conduit Width Width Spring Height Springing Height Also used to calculate Height (see below). Crown Height Height is calculated as: Crown Height + Spring Height

InfoWorks RS Object	InfoWorks ICM Object	Conversion Notes
Gated Weir	Weir	InfoWorks RS Gated Weirs are imported as InfoWorks ICM Weirs with Link type set to GTWeir with the following mappings: InfoWorks RS field InfoWorks ICM field Upstream Node US node ID Downstream Node DS node ID Sill Level Crest Gate Depth Gate height Sluice Width Width Throat Discharge Coeff. Discharge coefficient Discharge Coefficient Secondary discharge coefficient Reverse Gate Disch. Coeff. Reverse discharge coefficient Modular Limit Modular limit Gate Orientation Gate orientation N/A Positive speed set to 1 Min opening Minimum opening set to 0 Max opening Maximum opening set to Gate Depth
Round Nosed Broad Crested Weir	Weir	InfoWorks RS Round Nosed Broad Crested Weirs are imported as InfoWorks ICM Weirs with Link type set to BRWeir with the following mappings: InfoWorks RS field InfoWorks ICM field Upstream Node US node ID Downstream Node DS node ID Crest Level Crest Weir Width Width Crest Length Length
Sharp Crested Weir	Weir	InfoWorks RS Sharp Crested Weirs are imported as InfoWorks ICM Weirs with Link type set to Weir with the following mappings: InfoWorks RS field InfoWorks ICM field Upstream Node US node ID Downstream Node DS node ID Crest Level Crest Weir Width Width Calibration Coefficient InfoWorks ICM Discharge coefficient is calculated as: 0.568 x Calibration Coefficient
Broad Crested Weir	Weir	InfoWorks RS Broad Crested Weirs are imported as InfoWorks ICM Weirs with Link type set to Weir with the following mappings: InfoWorks RS field InfoWorks ICM field Upstream Node US node ID Downstream Node DS node ID Crest Level Crest Weir Width Width Discharge Coefficient Discharge Coefficient

InfoWorks RS Object	InfoWorks ICM Object	Conversion Notes
Culvert Inlet Culvert Outlet	Culvert Inlet Culvert Outlet	InfoWorks RS Culvert Inlet and Culvert Outlet objects are imported as InfoWorks ICM Culvert Inlet and Culvert Outlet objects with the following mappings: InfoWorks RS field InfoWorks ICM field US Node US node ID DS Node DS node ID Reverse Flow Model Reverse flow model RS model ICM model Zero Nominal Calculated Outlet (culvert inlets) Calc (culvert outlets) Note: for culvert outlets there is no equivalent to the 'Calculated' RS reverse flow model type in InfoWorks ICM. Therefore the Reverse flow model field in ICM will be set to 'Calc' which will fail validation, providing a warning to the user that the object has not been fully converted. Type Culvert Inlet only Equation Unsubmerged Inlet Loss Coeff. (K) Culvert Inlet only K Flow Intensity Exponent (M) Culvert Inlet only M Submerged Inlet Loss Coeff (c) Culvert Inlet only c Submerged Inlet Adjust (Y) Culvert Inlet only Y Outlet Loss Coeff. Culvert Inlet only Outlet headloss coefficient (Ko)

InfoWorks RS Object	InfoWorks ICM Object	Conversion Notes
Vertical Sluice	Sluice	InfoWorks RS Vertical Sluice objects are imported as InfoWorks ICM Sluice objects with the following mappings: InfoWorks RS field InfoWorks ICM field US node US node ID DS node DS node ID Crest Level Invert level Sluice Gate width Width Gate depth Gate depth Overgate Flow Coeff. Discharge coefficient calculated from RS Overgate Flow Coefficient: Discharge coeff = Overgate flow coeff x 0.602 x 2/3 x √2 Weir Flow Coeff. Secondary discharge coefficient calculated from RS Weir Flow Coefficient: Secondary discharge coeff. = Weir flow coeff. x (2/3)1.5

InfoWorks RS Object	InfoWorks ICM Object	Conversion Notes
Orifice (Outlet Type = Open)	Sluice	InfoWorks RS Orifice objects are imported as InfoWorks ICM Sluice objects with the following mappings: InfoWorks RS field InfoWorks ICM field US node US node ID DS node DS node ID Bore Area, Soffit Level, Invert Level Width calculated as: Bore Area / (Soffit Level - Invert Level) Surcharged discharge Discharge coefficient calculated from RS Surcharge discharge as: Discharge coeff = Surcharged discharge x 0.799 x √2 Sill discharge Secondary discharge coefficient calculated from RS Sill Discharge: Secondary discharge coeff. = Sill Discharge. x (2/3)1.5 Soffit Level, Invert Level Opening height calculated as: Soffit Level - Invert Level Invert Level Invert level

InfoWorks RS Object	InfoWorks ICM Object	Conversion Notes
2D Simulation Polygon	2D Zone	InfoWorks RS 2D Simulation Polygons are imported as InfoWorks ICM 2D Zones. River reaches will be linked to 2D zones using the Left 2D zone ID and/or Right 2D zone ID fields as appropriate. Note The RS csv exporter does not support export of the 2D mesh within the polygon. Re-meshing will have to be carried out in InfoWorks ICM.
2D Point Source	2D Point Source	Only the 2D Point Source location (x and y) is imported from InfoWorks RS. Inflow at the point source must be defined after import due to differences in 2D Point source modelling between InfoWorks RS and InfoWorks ICM.
2D Boundary	2D Boundary	Only the 2D Boundary location is imported from InfoWorks RS. Boundary conditions must be defined after import due to differences in 2D Boundary modelling between InfoWorks RS and InfoWorks ICM.
Roughness Polygon	Roughness Zone	In InfoWorks RS, a Roughness Polygon is associated with a Roughness Zone. In InfoWorks ICM, the roughness value is stored with the Roughness Zone, therefore a Roughness value must be specified after import.
Porous Wall	Porous Wall	Import is straightforward and field mapping self explanatory
Mesh Polygon	Mesh Zone	Import is straightforward and field mapping self explanatory
2D IC Polygon	2D IC Zone	Import is straightforward and field mapping self explanatory
Porous Polygon	Porous Polygon	Import is straightforward and field mapping self explanatory

InfoWorks RS Object	InfoWorks ICM Object	Conversion Notes
General Line	General Line	Import is straightforward and field mapping self explanatory
General Polygon	Polygon	Import is straightforward and field mapping self explanatory