Channel Shape Data Fields (InfoWorks)

Channel shapes are used to define a Channel cross section profile.

Note: To view all data relating to this object, use the Object Properties Window. These data fields are read-only in ICMLive Operator Client. Network objects are configured in InfoWorks ICM Ultimate and ICMLive Configuration Manager. Please refer to the InfoWorks ICM help for more details.

The following table describes all the channel shape specific data which can be used to define a reusable channel shape.

Fields that are common to the majority of objects can be found in the Common Fields topic.

Channel Shape Data

Database Table Name: hw_channel_shape

Field Name

Description

Database Field

Data Type

Size

Units

Precision

Default

Error Lower Limit

Error Upper Limit

Warning Lower Limit

Warning Upper Limit

Shape ID

Unique identifier for the channel shape.

shape_id

Text

Roughness type

Either CW (Colebrook-White) or Manning equations for hydraulic roughness:

Database Value

Description

MANNING

Manning's 1/n

Enter the 1/n value for the Manning's equation.

Using 1/n as input to the Manning's equation is a common practice as 1/n is normally a more manageable number

Manning's n

Enter the n value for the Manning's equation

Colebrook White

Enter the Ks value for the Colebrook White equation

roughness_type

Text

Channel profile

The series of records that defines the channel cross section.

Database Table Name: hw_chan_profile

Position in Data Structure	Field Name	Decsription	Database Field	Data Type	Units	Error Lower Limit	Warning Lower Limit
1	X Coordinate	X coordinate values defined in ascending value. The first value represents the left bank of the channel when looking downstream. You can represent a vertical section by having two consecutive points with the same X value but different depth values. The origin can be defined arbitrarily. For example, you might define the origin at the left bank, so that all the coordinate values are greater than zero, or you may define the origin at the centre of the channel, so that the left bank co-ordinate is negative and the right bank positive	X	Double	L
2	Depth	The depth at this point in the channel from the bottom of the channel. The lowest point in the channel must therefore have a depth of zero.	Z	Double	L	0	0
3	Roughness Colebrook-White	Roughness value used when Roughness type is set to CW (Colebrook White). Enter the 1/n value for the Manning's equation. The roughness value applies from this point on the section to the next point. The points are organised by increasing X value. Therefore, the value on the last entry in the table will have no effect. A value of zero is valid. You use it to represent sections of the channel that store, but do not convey flow (for example, flood plains)	roughness_CW	Double	RCW	0	0
4	Roughness Manning's	Roughness value used when Roughness type is set to Manning (Manning's 1/n). Enter the 1/n value for the Manning's equation. The roughness value applies between the point at which it is defined and the next point along the section. This means that the last value of Manning's 1/n will have no effect, but it still needs to be defined. A value of zero is valid. You use it to represent sections of the channel that store, but do not convey flow (for example, flood plains).	roughness_Manning	Double		0	0
5	Roughness Manning's n	Roughness value used when Roughness type is set to N (Manning's n). Enter the n value for the Manning's equation. The roughness value applies between the point at which it is defined and the next point along the section. This means that the last value of Manning's n will have no effect, but it still needs to be defined. A value of zero is valid. You use it to represent sections of the channel that store, but do not convey flow (for example, flood plains).	roughness_N	Double		0	0
6	New Panel	If checked, indicates that this is the start of a new conveyance panel. By definition, the first record is the start of the first panel in the section, so you don't need to tick it. For a river channel, you would typically define three panels: left flood plain main channel right flood plain	new_panel	Boolean

profile

Array

Channel Shape Data Fields (InfoWorks)

Channel Shape Data

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