Importing MicroDrainage Data

Data from MicroDrainage models can be imported to InfoWorks ICM using files in the MDX format.

MicroDrainage has a different node-link structure to InfoWorks ICM; it is based around pipes with manholes as sub-elements of the pipes. This means that a manhole which is located between two pipes has its data duplicated as the downstream manhole of one pipe and the upstream manhole of another. In addition, link structures (such as a pump) in InfoWorks ICM are properties (sub-elements) of a pipe in MicroDrainage, and "Flow through structures" in MicroDrainage effectively replace the pipe on which they appear.

The Import Notes section contains the import information that applies to such items.

To import MicroDrainage network data:

Open the network to be updated.
Select Import | Model | from MicroDrainage data from the Network menu, and a standard Windows Open dialog is displayed.
Show me
Select the .mdx file to be imported.
Click Open.

An import report will be displayed with any import errors or warnings. It will also include the full path of the mdx file which was imported together with the full path in the InfoWorks ICM tree of the target network.

Show me

For an mdx file with a single MicroDrainage network, all data is imported into the currently selected scenario of the target network in InfoWorks ICM.

For an mdx file with multiple MicroDrainage networks, the data from each MicroDrainage network is imported into a different scenario in the target network. For example, a MicroDrainage network with name "XXXXX" the corresponding scenario in InfoWorks ICM is named "MD_XXXXX". If a scenario does not already exist, a new one will be created.

For each scenario the report provides the total number of imported objects of different types.

For details of the objects imported and any conversions made by the MicroDrainage Importer, see the Import Notes below.

Import Notes

The following sections provide information about the import of network objects from MicroDrainage to InfoWorks ICM.

Pipes to Nodes

A node (hw_node) is created in InfoWorks ICM from each Site/Networks/Network/Pipes/Pipe element in MicroDrainage using the USManhole element from each pipe. Nodes will also be created for any DSManhole elements that do not also appear as a USManhole, with their node_type set to 'Outfall'.

MicroDrainage Attribute

InfoWorks ICM

Notes

Parameter

Database name

PipeNumber

Node ID

node_id

USManhole/Name

User text 1

user_text_1

USManhole/Connection

Node type

node_type

MicroDrainage Database Value	InfoWorks ICMDatabase Value
0	Manhole
1	Manhole
2	Break
3	Manhole

Flood type

flood_type

MicroDrainage Database Value	InfoWorks ICMDatabase Value
0	Stored
1	Sealed
2	Stored
3	Open

USManhole/Easting

USManhole/Northing

USManhole/CoverLevel

Ground level

ground_level

Flood level

flood_level

USManhole/Diameter

Chamber plan area

chamber_area

If Width==0 then (Diameter/2)2 * pi is used.

Otherwise Diameter * Width is used.

USManhole/Width

USManhole/Diameter

Shaft plan area

shaft_area

If Width==0 then (Diameter/2)2 * pi is used.

Otherwise Diameter * Width is used.

USManhole/Width

N/A

Floodable area

floodable_area

0.1 ha

N/A

Flood area 1

flood_area_1

100%

N/A

Flood are 2

flood_area_2

100%

N/A

Flood depth 1

flood_depth_1

0.01m

N/A

Flood depth 2

flood_depth_2

1000m

Pipes to Nodes (Outfall)

An additional node (hw_node) is created in InfoWorks ICM from each Site/Networks/Network/Pipes/Pipe element in MicroDrainage that has no DSPipeIndex attribute or whose DSPipeIndex attribute is zero.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	Node ID	node_id	"ds" is appended to the name to provide a unique identifier for this node.
DSManhole/Name	User text 1	user_text_1
N/A	Node type	node_type	Outfall
DSManhole/Easting	X	x
DSManhole/Northing	Y	y
DSManhole/CoverLevel	Ground level	ground_level
DSManhole/CoverLevel	Flood level	flood_level

Other Pipe to nodes

Tank or Pond elements to Storage Nodes

For each pipe in MicroDrainage that has FTStruct or USManhole element with a StorageStructure element that contains a TankOrPond element, the corresponding node’s node_type to is set to 'Storage' in InfoWorks ICM. Other fields are converted as follows:

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
N/A	Relative stages	relative_stages	False
DepthAreas	Storage array	storage_array	The InvertLevel attribute’s value is added to each depth.
InvertLevel	Storage array	storage_array	The InvertLevel attribute’s value is added to each depth.

Note

If any of the data to be imported contains any TankOrPond in an FTStruct element, then these can be moved to StorageStructure elements by unticking the Flow Through Structure option on the Pond property editor in MicroDrainage.

Lined soakaways to ponds

For each pipe in MicroDrainage that has FTStruct or USManhole element with a StorageStructure element that contains a LinedSoakaway element, the corresponding node’s type of node (node_type) is converted to 'Pond' in InfoWorks ICM. Other fields are set as follows:

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
Invertlevel	Vegetation level	vegetation_level	If CapInfiltration is zero, the value for CoverLevel is imported. Otherwise, the values for Invertlevel and CapInfiltration are used instead.
CapInfiltration
CoverLevel
InvertLevel	Liner level	liner_level
N/A	Infiltration loss coefficient above vegetation	infiltratn_coeff_abv_vegn	0.0
InfiltrationCoefficientSide / SafetyFactor	Infiltration loss coefficient above liner	infiltratn_coeff_abv_liner
InfiltrationCoefficientBase / Safetyfactor	Infiltration loss coefficient below liner	infiltratn_coeff_blw_liner
N/A	Relative stages	relative_stages	False
N/A	Storage array	storage_array	InvertLevel set as first level. Area and perimeter are calculated from the RingDiameter attribute which is assumed to be circular. If CapVolume is zero, the CoverLevel is used as the second level, with the same area and perimeter as the first entry. Otherwise: CapVolume and InvertLevel are used as the second level, with the same area and perimeter as the first entry. 0.01m is added for the next level, with an area of 1m² and the same perimeter Another level equal to CoverLevel is added for the next level, with an area of 1m² and the same perimeter Another level equal to CoverLevel + 0.01m is added for the next level, with an area of 1000 m² and the same perimeter Areas and perimeters are multiplied by NoRequired attribute, if present.

House soakaways to ponds

For each pipe in MicroDrainage that has FTStruct or USManhole element with a StorageStructure element that contains a HouseSoakaway element, the corresponding node’s type of node (node_type) is converted to 'Pond' in InfoWorks ICM. Other fields are set as follows:

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
Invertlevel	Vegetation level	vegetation_level	If CapInfiltration is zero, the CoverLevel is used. Otherwise, the Invertlevel and CapInfiltration are used instead.
CapInfiltration
CoverLevel
InvertLevel	Liner level	liner_level
N/A	Infiltration loss coefficient above vegetation	infiltratn_coeff_abv_vegn	0.0
InfiltrationCoefficientSide / SafetyFactor	Infiltration loss coefficient above liner	infiltratn_coeff_abv_liner
InfiltrationCoefficientBase / Safetyfactor	Infiltration loss coefficient below liner	infiltratn_coeff_blw_liner
N/A	Relative stages	relative_stages	False
N/A	Storage array	storage_array	InvertLevel set as first level. Area and perimeter are calculated from the PitWidth attribute which is assumed to be square. If CapVolume is zero, the CoverLevel is used as the second level, with the same area and perimeter as the first entry. Otherwise: CapVolume and InvertLevel are used as the second level, with the same area and perimeter as the first entry. 0.01m is added for the next level, with an area of 1m² and the same perimeter Another level equal to CoverLevel is added for the next level, with an area of 1m² and the same perimeter Another level equal to CoverLevel + 0.01m is added for the next level, with an area of 1000 m² and the same perimeter Areas and perimeters are multiplied by NoRequired attribute, if present .

Infiltration trenches, trench soakaways, dry swales, filter drains or swales to ponds

For each pipe in MicroDrainage that has FTStruct or USManhole element with a StorageStructure element that contains an InfiltrationTrench, TrenchSoakaway or DrySwale element, or a StorageStructure (but not FTstruct) element that contains a Swale element, the corresponding node’s type of node (node_type) is converted to' Pond' in InfoWorks ICM. Other fields are set as follows:

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
Invertlevel	Vegetation level	vegetation_level	If CapInfiltration is zero, CoverLevel is used. Otherwise, the Invertlevel and CapInfiltration are used instead.
CapInfiltration
CoverLevel
InvertLevel	Liner level	liner_level
N/A	Infiltration loss coefficient above vegetation	infiltratn_coeff_abv_vegn	0.0
InfiltrationCoefficientSide / SafetyFactor	Infiltration loss coefficient above liner	infiltratn_coeff_abv_liner
InfiltrationCoefficientBase / Safetyfactor	Infiltration loss coefficient below liner	infiltratn_coeff_blw_liner
N/A	Relative stages	relative_stages	False
N/A	Storage array	storage_array	InvertLevel set as first level. Area and perimeter are calculated from the TrenchLength and Width attributes which is assumed to be rectangular. If CapVolume is zero, the CoverLevel is used as the second level, with the same area and perimeter as the first entry. Otherwise: CapVolume and InvertLevel are used as the second level, with the same area and perimeter as the first entry. 0.01m is added for the next level, with an area of 1m² and with the same perimeter again Another level equal to CoverLevel is added for the next level, with an area of 1m² and the same perimeter Another level equal to CoverLevel + 0.01m is added for the next level, with an area of 1000 m² and the same perimeter Areas and perimeters are multiplied by NoRequired attribute, if present.

Infiltration basins or cellular storage to ponds

For each pipe in MicroDrainage that has FTStruct or USManhole element with a StorageStructure element that contains an InfiltrationBasin or CellularStorage element, the corresponding node’s type of node (node_type) is converted to 'Pond' in InfoWorks ICM. Other fields are set as follows:

MicroDrainage Attribute	InfoWorks ICM		Notes
	Parameter	Database name
CoverLevel	Vegetation level	vegetation_level
InvertLevel	Liner level	liner_level
N/A	Infiltration loss coefficient above vegetation	infiltratn_coeff_abv_vegn	0.0
InfiltrationCoefficientSide / SafetyFactor	Infiltration loss coefficient above liner	infiltratn_coeff_abv_liner
InfiltrationCoefficientBase / Safetyfactor	Infiltration loss coefficient below liner	infiltratn_coeff_blw_liner
N/A	Relative stages	relative_stages	False
DepthAreas	Storage array	storage_array	The value of the InvertLevel attribute is added to each depth.
InvertLevel	Storage array	storage_array

InfoWorks ICM has no equivalent of infiltration areas, therefore that aspect of cellular storage is not imported.

Infiltration blanket or porous car park to manhole infiltration

For each pipe in MicroDrainage that has FTStruct or USManhole element with a StorageStructure element that contains an InfiltrationBasin or CellularStorage element, the corresponding node’s parameters are converted in InfoWorks ICM as follows:

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
InfiltrationCoefficientBase / Safetyfactor	Infiltration loss Coefficient	infiltration_coeff
DiameterWidth (Width for PorousCarpark)	Base area	base_area	If Length is specified, the area is calculated as (Trench)Length x (Diameter)Width. Otherwise, it is assumed to be circular with diameter = (Diameter)Width.
Length (TrenchLength for PorousCarpark)	Base area	base_area
DiameterWidth (Width for PorousCarpark)	Perimeter	perimeter	If Length is specified, the perimeter is calculated as 2 x (Trench)Length + (Diameter)Width. Otherwise, it is assumed to be circular with diameter = (Diameter)Width.
Length (TrenchLength for PorousCarpark)	Perimeter	perimeter

Bio-retention area or sand filter to ponds

For each pipe in MicroDrainage that has FTStruct or USManhole element with a StorageStructure element that contains a bio-retention area or sand filter element, the corresponding node’s type of node (node_type) is converted to 'Pond' in InfoWorks ICM. Other parameters are set as follows:

MicroDrainage Attribute	InfoWorks ICM		Notes
	Parameter	Database name
CoverLevel	Vegetation level	vegetation_level
InvertLevel	Liner level	liner_level
N/A	Infiltration loss coefficient above vegetation	infiltratn_coeff_abv_vegn	0.0
InfiltrationCoefficientSide / SafetyFactor	Infiltration loss coefficient above liner	infiltratn_coeff_abv_liner
InfiltrationCoefficientBase / Safetyfactor	Infiltration loss coefficient below liner	infiltratn_coeff_blw_liner
N/A	Relative stages	relative_stages	False
DepthAreas	Storage array	storage_array	The value of the InvertLevel attribute is added to each depth.
InvertLevel	Storage array	storage_array

Bore soakaway to manhole infiltration

The manhole fields from the DeepBoreSoakaway element in MicroDrainage are set as follows:

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
InfiltrationCoefficientBase / Safetyfactor	Infiltration loss Coefficient	infiltration_coeff
ChamDia	Base area	base_area	If ChamWid is specified, the area is calculated as ChamWid x ChamDia. Otherwise, it is assumed to be circular with diameter = ChamDia.
ChamWid	Base area	base_area
ChamDia	Perimeter	perimeter	If ChamWid is specified, the perimeter is calculated as 2 x (ChamWid x ChamDia). Otherwise, it is assumed to be circular with diameter = ChamDia.
ChamWid	Perimeter	perimeter

Pipes to subcatchments

For each Site/Networks/Network/Pipes/Pipe in MicroDrainage that has a non-zero Area attribute or a non-empty Areas attribute, a subcatchment (hw_subcatchment) is created in InfoWorks ICM.

For any pipe that has either the BaseFlow or Houses attributes set in MicroDrainage, a subcatchment will be created in ICM even if the pipe has a zero Area attribute or an empty Areas attribute.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	Subcatchment ID	subcatchment_id
N/A	Drains to	drains_to	Node
PipeNumber	Node ID	node _id
Area	Total area	total_area
Easting	X	x
Northing	Y	y
Areas	Points	boundary_array	If the Areas element is present, the subcatchment’s geometry will be populated with the Area/Coordinates element’s Easting and Northing attributes. Otherwise, this will be left empty (null).
PIMP	Land use ID	land_use_id	A new land use object is created for each different PIMP (Percentage Impervious) value imported which is referenced by the relevant subcatchment object(s). This ensures that the subcatchment has its Runoff area 1 absolute field set to PIMP % of its total area and its Runoff area 2 absolute field set to (100 - PIMP) % of its total area. The name of the land use object is LandUse_xxx where xxx is the value of the applicable land use object's Default area 1 (%) property.
Houses / PersonsPerHouse	Population	population	The value in the Population field is set to the product of the Pipes attribute Houses with the PersonsPerHouse attribute defined for the Network/DesignCriteria in MicroDrainage.

Pipes to conduits

For each Site/Networks/Network/Pipes/Pipe element in MicroDrainage, a conduit (hw_conduit) is created in InfoWorks ICM.

MicroDrainage Attribute

InfoWorks ICM

Notes

Parameter

Database name

PipeNumber

US node ID

us_node_id

N/A

DS node ID

ds_node_id

Constructed from DSManhole/Name.

Length

conduit_length

Diameter

Width

conduit_width

ConnectionHeight

Height

conduit_height

Roughness

Top Roughness Manning's n

top_roughness_n

Bottom Roughness Manning's n

bottom_roughness_n

SedimentDepth

Sediment depth

sediment_depth

USIL

US invert level

us_invert

USIL - fall

DS invert level

ds_invert

SectionType

Shape ID

shape

The section type is converted as follows:

MicroDrainage Section Types	InfoWorks ICMDatabase parameters and values
0 or missing	Shape set to CIRC.
1: DoublePipe	Shape set to CIRC and the Number of Barrels set to 2.
2:TriplePipe	Shape set to C IRC and the Number of Barrels set to 3.
3: Ditch	Shape set to OREC.
4: Ditch11	Shape set to OT1:1
5: Ditch115	A trapezoidal shape is created with side slope 1:1.5, the MicroDrainage Diameter attribute is used for the base width and the ConnectionHeight attribute for the height.
6: Ditch12	Shape set to OT1:2
7: Swale13	A trapezoidal shape is created with side slope 1:3, the MicroDrainage Diameter attribute is used for the base width and the ConnectionHeight attribute for the height. If the MicroDrainage Roughness attribute is missing, the InfoWorks ICM Top roughness Manning's n parameter is set to =0.045 and Bottom roughness Manning's n is set to 0.045.
8: Swale14	Shape set to OT1:4 If the MicroDrainage Roughness attribute is missing, the InfoWorks ICM Top roughness Manning's n parameter is set to =0.045 and Bottom roughness Manning's n is set to 0.045.
9: V15	A trapezoidal shape is created with side slope 1:5, the MicroDrainage Diameter attribute is used for the base width and the ConnectionHeight attribute for the height.
10: Culvert16	Shape set to RECT. If the MicroDrainage Diameter attribute is missing, the InfoWorks ICM Width parameter is set to 600mm.
11: Culvert800	Shape set to RECT. If the MicroDrainage Diameter attribute is missing, the InfoWorks ICM Width parameter is set to 800mm.
12: Culvert1000	Shape set to RECT. If the MicroDrainage Diameter attribute is missing, the InfoWorks ICM Width parameter is set to 1000mm.
13: Culvert1200	Shape set to RECT. If the MicroDrainage Diameter attribute is missing, the InfoWorks ICM Width parameter is set to 1200mm.
14: Culvert1500	Shape set to RECT. If the MicroDrainage Diameter attribute is missing, the InfoWorks ICM Width parameter is set to 1500mm.
14: Culvert1800	Shape set to RECT. If the MicroDrainage Diameter attribute is missing, the InfoWorks ICM Width parameter is set to 1800mm.
14: Culvert2100	Shape set to RECT. If the MicroDrainage Diameter attribute is missing, the InfoWorks ICM Width parameter is set to 2100mm.
17: SwaleV	A V shape is created with side slope 1:5 and the MicroDrainage Diameter attribute is used for the height. The InfoWorks ICM height (conduit_height) is set to the value of the Diameter attribute and the Width (conduit_width) is set to 0. If the MicroDrainage Roughness attribute is missing, the InfoWorks ICM Top roughness Manning's n parameter is set to =0.01 and Bottom roughness Manning's n is set to 0.01.
18: Swale145	A trapezoidal shape is created with side slope 1:4.5, the MicroDrainage Diameter attribute is used for the base width and the ConnectionHeight attribute for the height. If the MicroDrainage Roughness attribute is missing, the InfoWorks ICM Top roughness Manning's n parameter is set to =0.01 and Bottom roughness Manning's n is set to 0.01.
19: FTSPond – FTStruct/TankOrPond	InfoWorks ICM's Top roughness Manning's n parameter and Bottom roughness Manning's n are set to same value as specfied in MicroDrainage's ManN attribute in the specified element .
20: FTSPorousCarPark – FTStruct/PorousCarpark
21: FTSInfiltrationBlanket – FTStruct/InfiltrationBlanket
22: FTSBioRetentionArea – FTStruct/BioRetentionArea
23: FTSSandFilter – FTStruct/SandFilter
24: FTSInfiltrationBasin – FTStruct/InfiltrationBasin
25: FTSCellularStorage – FTStruct/CellularStorage
26: FTSInfiltrationTrench – FTStruct/InfiltrationTrench
27: FTSFilterDrain – FTStruct/FilterDrain
28: FTSTrenchSoakaway – FTStruct/TrenchSoakaway
29: FTSSwale
30: FTSDrySwale – FTStruct/DrySwale
31: FacadeLeft_Gatic	Shape imported as a null value.
32: FacadeRight_Gatic
33: PaveSlot_Gatic
34: CastSlot_Gatic
35: CastSlotTreadsafe_Gatic
36: UltraSlot_Gatic
37:UltraSlotTreadsafe
38: Pipe_Gatic
39: SelfA15_Gatic
40: SelfB125_Gatic
41: Tec_Gatic
42: ProVNr0_Gatic
43: ProVNr5_Gatic
44: ProVNr10_Gatic
45: ProVNr20_Gatic
46: ProGNr0_Gatic
47: ProGNr5_Gatic
48: ProGNr10_Gatic
49: ProGNr20_Gatic

Pipes (Online Control) to link objects

In InfoWorks ICM, a structure link such as an orifice, will be added for each of the MicroDrainage online control elements described in the following sections. Note that existing pipes will be shortened by 1m (or 10% of its length, if the pipe is less than 10m long) and a new link will be created for the structure which is connected to the upstream node. A manhole will be inserted between the structure link and the shortened pipe. These manholes will be given the same IDs as the corresponding upstream nodes (us_node_id)/PipeNumbers but with "br" appended at the end of them, and the Shaft plan area and Chamber plan area field will be set to 1m².

Note that a single pipe can only have one online control.

Orifice to orifice

An orifice object (hw_orifice) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OnlineControl/Orifice element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added.
CD	Discharge coefficient	discharge_coeff
Diameter	Diameter	diameter
InvertLevel	Invert level	invert

Depth flow to user defined control and head discharge

A user defined control object (hw_user_control) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OnlineControl/DepthFlow element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added.
DepthFlow/InvertLevel	Invert level	invert
USManhole/Name	Head discharge ID	head_discharge_id	The ID is set to the US node ID.

A head discharge object (hw_head_discharge) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OnlineControl/DepthFlow element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	Head discharge ID	head_discharge_id	The ID is set to the US node ID for the associated user control link. If this name is the same as the head discharge row object, then a "!" is appended to highlight that this is a duplicate name.
DepthFlow/DepthFlows	Head discharge power table	HDP_table	The MicroDrainage Depth and Outflow are imported into the head and discharge records in the Head discharge power table.

V-notch weir to weir

A weir object (hw_weir) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OnlineControl/V-NotchWeir element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added.
N/A	Link type	link_type	Link type is set to VNWEIR in InfoWorks ICM.
InvertLevel	Crest	crest
Width	Width	Width	Calculated from notch_height and angle.
N/A	Notch height	notch_height
Angle	Notch angle	notch_angle
N/A	Number of notches	number_of_notches	Set to 1.

Weir to weir

A weir object (hw_weir) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OnlineControl/Weir element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added.
N/A	Link type	link_type	Link type is set to WEIR in InfoWorks ICM.
CD	Discharge Coefficient	discharge_coeff
InvertLevel	Crest	crest
Width	Width	width

Gate to sluice

A sluice object (hw_sluice) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OnlineControl/Gate element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added.
InvertLevel	Crest	crest
Width	Width	width
CoefContraction	Discharge Coefficient	discharge_coeff
Height	Opening	opening

Pump to pump and head discharge

A pump object (hw_pump) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OnlineControl/Pump element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added
N/A	Link type	link_type	Link type is set to ROTPMP in InfoWorks ICM.
N/A	Switch on level	switch_on_level	InvertLevel + highest depth in HDP_table.
InvertLevel	Switch off level	switch_off_level
USManhole/Name	Head discharge ID	head_discharge_id	The ID is set to the US node ID.

A head discharge object (hw_head_discharge) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USMahole/OnlineControl/Pump element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	Head discharge ID	head_discharge_id	The ID is set to the US node ID for the associated pump. If this name is the same as the head discharge row object, then a "!" is appended to highlight that this is a duplicate name.
DepthFlow	Head discharge power table	HDP_table	The MicroDrainage Depth and Outflow are imported into the head and discharge records in the Head discharge power table.

Flap value to flap valve

A flap valve object (hw_flap_valve) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OnlineControl/Pump element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added.
N/A	Link type	link_type	Link type is set to WEIR in InfoWorks ICM.
CD	Discharge Coefficient	discharge_coeff
InvertLevel	Crest	crest
Width	Width	width

Complex controls

For any Site/Networks/Network/Pipes/Pipe/USMahole/OnlineControl/Complex element in MicroDrainage, a parallel link will be created for each of the elements in the FlowControls element in InfoWorks ICM.

Pipes (Offline Control) to link objects

A structure link, such as an orifice, in InfoWorks ICM will be added for each of the MicroDrainage offline control elements described in the following sections.

Note that if the LoopToIndex attribute being imported is zero or positive, then the downstream node id (ds_node_id) in InfoWorks ICM will be set to the node indicated by the LoopToIndex attribute. If it is not, then an outfall node will be inserted downstream of the structure link. This node will have the same ID as the upstream node (us_node_id)/PipeNumber but with "ds" appended at the end of it.

Note that a single pipe may have more than one offline control.

Orifice to orifice

An orifice object (hw_orifice) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OfflineControl/Orifice element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added.
CD	Discharge coefficient	discharge_coeff
Diameter	Diameter	diameter
InvertLevel	Invert level	invert

Depth flow to user defined control and head discharge

A user defined control object (hw_user_control) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OfflineControl/DepthFlow element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added
DepthFlow/InvertLevel	Invert level	invert
USManhole/Name	Head discharge ID	head_discharge_id	The ID is set to the US node ID.

A head discharge object (hw_head_discharge) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OfflineControl/DepthFlow element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	Head discharge ID	head_discharge_id	The ID is set to the US node ID for the associated user control link. If this name is the same as the head discharge row object, then a "!" is appended to highlight that this is a duplicate name.
DepthFlow/DepthFlows	Head discharge power table	HDP_table	The MicroDrainage Depth and Outflow are imported into the head and discharge records in the Head discharge power table.

V-notch weir to weir

A weir object (hw_weir) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OfflineControl/V-NotchWeir element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added.
N/A	Link type	link_type	Link type is set to VNWEIR in InfoWorks ICM.
InvertLevel	Crest	crest
Width	Width	Width	Calculated from notch_height and angle.
N/A	Notch height	notch_height
Angle	Notch angle	notch_angle
N/A	Number of notches	number_of_notches	Set to 1.

Weir to weir

A weir object (hw_weir) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OfflineControl/Weir element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added.
N/A	Link type	link_type	Link type is set to WEIR in InfoWorks ICM.
CD	Discharge Coefficient	discharge_coeff
InvertLevel	Crest	crest
Width	Width	width

Gate to sluice

A sluice object (hw_sluice) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OfflineControl/Gate element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added.
InvertLevel	Crest	crest
Width	Width	width
CoefContraction	Discharge Coefficient	discharge_coeff
Height	Opening	opening

Pump to pump and head discharge

A pump object (hw_pump) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OfflineControl/Pump element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added.
N/A	Link type	link_type	Link type is set to ROTPMP in InfoWorks ICM.
N/A	Switch on level	switch_on_level	InvertLevel + highest depth in the Head discharge power table (see the head discharge object description below).
InvertLevel	Switch off level	switch_off_level
USManhole/Name	Head discharge ID	head_discharge_id	The ID is set to the US node ID.

A head discharge object (hw_head_discharge) is also created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USMahole/OfflineControl/Pump element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	Head discharge ID	head_discharge_id	The ID is set to the US node ID for the associated pump. If this name is the same as the head discharge row object, then a "!" is appended to highlight that this is a duplicate name.
DepthFlow	Head discharge power table	HDP_table	The MicroDrainage Depth and Outflow are imported into the head and discharge records in the Head discharge power table.

Flap value to flap valve

A flap valve object (hw_flap_valve) is created in InfoWorks ICM for each MicroDrainage Site/Networks/Network/Pipes/Pipe/USManhole/OfflineControl/Pump element.

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
PipeNumber	US node ID	us_node_id
N/A	DS node ID	ds_node_id	Node name added.
N/A	Link type	link_type	Link type is set to WEIR in InfoWorks ICM.
CD	Discharge Coefficient	discharge_coeff
InvertLevel	Crest	crest
Width	Width	width

Complex controls

For any Site/Networks/Network/Pipes/Pipe/USMahole/OfflineControl/Complex element in MicroDrainage, a parallel link will be created for each of the elements in the FlowControls element in InfoWorks ICM.

Flow -through structures to link objects

Some structures in the MicroDrainage "flow-through" (FTStruct) mode effectively replace the pipe downstream and are imported as described in the following sections. Note that these elements are only available in MicroDrainage if they were added using the MDSuSDs Plugin.

Flow-through swale to channel or closed conduit

For each pipe in MicroDrainage that has a USManhole element with an FTstruct element that contains a Swale element, the imported link will be replaced in InfoWorks ICM with a channel link object (hw_channel). However, if the swale has a Cap Volume at Depth attribute which is assigned a non-zero value, then a conduit with a closed Shape ID will be created.

The channel and closed-shaped conduit will be created using the base width and side slope values, with the height of the closed conduit determined by the Cap Volume at Depth attribute.

Other attributes are imported as follows:

MicroDrainage Attribute	InfoWorks ICM		Notes
MicroDrainage Attribute	Parameter	Database name	Notes
InfiltrationCoefficientSide / SafetyFactor	Side infiltration loss coefficient	infiltration_coeff_side
InfiltrationCoefficientBase / SafetyFactor	Base infiltration loss coefficient	infiltration_coeff_base
Length	Length	length

Pipe from bio-retention area or sand filter

If the UDrainOn attribute on a bio-retention area or sand filter is "True" (which normally only applies to a FTStruct), then the diameter, number of pipes and roughness for the pipe downstream of the pond will be imported from the UnderDrain element.

Importing Network Data