Open channel data fields
Open channel data fields can be edited on the Open Channel Grid View of the Links grid or the Open Channel property sheet.
All the fields needed for an open channel are described in this topic.
Further information, including units details, about all the Network Object fields stored in the Master Database can be found in the data fields topics listed in the Network Data Fields topic.
Fields that are common to the majority of objects can be found in the Common Data Fields topic.
The pages on the property sheet are listed below.
- Pipe Definition page
- Open Channel page
- User page - see Common Data Fields topic for details of user fields
- Hyperlinks page - see Common Data Fields topic for details of hyperlinks fields
- Notes page - see Common Data Fields topic for details of notes fields
Pipe definition data
Database Table Name: wn_open_channel
Field Name |
Help Text |
Flag |
Grid |
Property Page |
Size |
Precision |
Database Field |
Default |
Error Lower Limit |
Error Upper Limit |
Warning Lower Limit |
Warning Upper Limit |
||||||||||||||
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From Node ID |
Name of the From Node for this pipe. You can select the name from the dropdown list of existing nodes, or type the name of a node you have yet to add to the model. From and To represent the typical direction of flow for the pipe. Flow will not always be in this direction. |
YES |
YES |
1 |
30 |
0 |
|
us_node_id |
Text |
|
|
|
|
|
||||||||||||
To Node ID |
Name of the To Node for this pipe. From and To represent the typical direction of flow for the pipe. Flow will not always be in this direction. |
YES |
YES |
1 |
30 |
0 |
|
ds_node_id |
Text |
|
|
|
|
|
||||||||||||
Area Code |
The Area Code parameter is used for closer spatial modelling of demand - each node is allocated to an area and demand can then be factored by area. The factor is set using the Demand Scaling Editor. |
YES |
YES |
1 |
30 |
0 |
|
area |
Text |
|
|
|
|
|
||||||||||||
Asset ID |
For reference only. Designed as a reference to an asset database, but could be used for anything. |
YES |
YES |
1 |
30 |
0 |
|
asset_id |
Text |
|
|
|
|
|
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Has Valve |
When enabled, indicates the presence of a isolation valve in the pipe, therefore the pipe can be opened or closed. |
YES |
YES |
YES |
|
|
|
iwlive_can_be_closed |
Boolean |
|
|
|
|
|
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Shape: Length |
The length of the pipe. |
YES |
YES |
1 |
|
2 |
L |
length |
|
|
0.1 |
1000000 |
|
|
||||||||||||
Friction: Type |
The formula used for roughness calculations. See Pipe Calculations for more information.
|
YES |
YES |
1 |
2 |
1 |
|
roughness_type |
Text |
|
|
|
|
|
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Construction: Material |
Link material. Used by the roughness formulae. |
YES |
YES |
1 |
10 |
0 |
|
material |
Text |
|
|
|
|
|
||||||||||||
Construction: Year |
Year of installation. Used by the roughness formulae. |
YES |
YES |
1 |
|
0 |
|
year |
Integer |
|
|
|
|
|
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WQ Parameters: WQ Bulk Coefficient |
The bulk coefficient, kb, is a reaction rate parameter used to calculate the change in concentration of a substance as it reacts with material in the bulk flow. The bulk coefficient has a positive value if the concentration of the substance grows over time, and a negative value if the concentration decays over time. ![]() Please Note
Source dependent bulk coefficient values may be specified at individual nodes which may override or scale the pipe Bulk Coefficient value when calculating reaction rates for water that entered the system at the node. |
YES |
YES |
1 |
|
2 |
|
bulk_coeff |
|
-0.5 |
-10 |
10 |
|
|
||||||||||||
System Type |
For information. Type in a system type or select an option from the dropdown list:
|
YES |
YES |
1 |
40 |
0 |
|
system_type |
Text |
|
|
|
|
|
||||||||||||
Isolation Area |
Area identifier used to identify groups of objects to be closed when carrying out a Critical Link Analysis. |
YES |
YES |
1 |
30 |
0 |
|
isolation_area |
Text |
|
|
|
|
|
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Suffix |
A suffix added by InfoWorks to ensure that all link Ids are unique |
YES |
YES |
NO |
1 |
0 |
|
link_suffix |
Text |
|
|
|
|
|
Open channel data
Field Name |
Help Text |
Flag |
Grid |
Property Page |
Size |
Precision |
Database Field |
Default |
Error Lower Limit |
Error Upper Limit |
Warning Lower Limit |
Warning Upper Limit |
|||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Channel Ends: Invert level Upstream |
This is the invert level for the upstream end of the link, measured above system datum. You must enter a value for this field. There is no restriction on whether the upstream or downstream invert level is higher. | YES | YES | 2 | |||||||||||||||||||||
Channel Ends: Invert level Downstream |
This is the invert level for the downstream end of the link, measured above system datum. | YES | YES | 2 | |||||||||||||||||||||
Channel Shape: Name |
Select a shape from the drop-down list or type in a shape name.
|
YES | YES | 2 | |||||||||||||||||||||
Channel Shape: Width |
Width value used to calculate cross sectional geometry of the conduit. For trapezoidal channels this is the bed width. For other open channels this is the width at the top of the channel lining, or at the maximum design water level. |
YES | YES | 2 | |||||||||||||||||||||
Channel Shape: Height |
Height value used to calculate cross sectional geometry of the conduit. For open channels this is the height to the top of the channel lining, or to the maximum water level. |
YES | YES | 2 | |||||||||||||||||||||
Inlet: Invert | The level at which the inlet orifice comes into operation. | YES | YES | 2 | |||||||||||||||||||||
Inlet: Orifice Diameter | Diameter of circular orifice. You should use the diameter of equivalent area for non-circular orifices. | YES | YES | 2 | |||||||||||||||||||||
Outlet: Weir Crest | The level at which the weir first comes into operation. | YES | YES | 2 | |||||||||||||||||||||
Outlet: Weir Width | The width of the rectangular weir. | YES | YES | 2 | |||||||||||||||||||||
Outlet: Weir Length | The distance across the flat part of the top of the weir measured parallel to the direction of flow. | YES | YES | 2 |
Results
All results fields are displayed on the grid when opened while viewing a replay of a simulation, and on a special results page placed at the front of Property Sheets displayed while viewing a simulation replay.
For details of results fields for links, see the Link Results Data Fields topic.