Culvert Inlet Data Fields

US node ID

Type in a node reference or choose an existing node reference from the dropdown list. This makes up the first part of the link reference.

us_node_id

Text

64

0

DS node ID

Type in a node reference, or choose an existing node reference from the drop down list.

ds_node_id

Text

64

0

Link suffix

A single character between A and Z or 0 and 9 which completes the link reference. This allows a node to have up to 36 downstream links. The suffix is automatically allocated by the software.

link_suffix

Text

1

0

1

Link type

There are no additional options. The field is hidden on the grid, and read-only on the property sheet.

link_type

Text

6

0

CLVIN

Asset ID

For reference only. Designed as a reference to an asset database, but could be used for anything.

asset_id

Text

64

0

Sewer reference

An optional reference to identify the sewer of which this conduit is a part.

sewer_reference

Text

80

0

System type

Choose the system type from the dropdown list. See System Type for more information.

system_type

Text

10

0

Other

Branch ID

Numeric field used to identify to which long section the link is associated.

Can be set manually or automatically (see Defining Branches topic for more information).

branch_id

Long Integer

0

0

US settlement efficiency (%)

Water Quality

This section is relevant only to Water Quality Simulations. If the icon is at the start of a paragraph, then that paragraph is only relevant to water quality simulations. If the icon is at the top of a topic, or a section (underneath a section title), or a row in a table, then the complete topic, section or row is only relevant to water quality simulations.

The settlement efficiency fields allow you to set the effectiveness of an overflow for trapping out sediment. The overflow is a link (normally a pipe) attached to a node acting as a storage tank (storage node or manhole).

Normally the upstream end of the link will be attached to the node and act as the overflow.

The upstream settlement efficiency determines the efficiency for the overflow.

In some circumstances the link may be reversed (storage tank at the downstream end) and the downstream settlement efficiency will be used.

In many cases an overflow will attach to an outfall from the system.

It would be very unusual to have both upstream settlement efficiency and downstream settlement efficiency set to non-zero values.

The valid range is 0-100%. 0% means the overflow acts as a normal continuation link. 100% means that the overflow traps out as much sediment as possible.

us_settlement_eff

Long Integer

0

0

0

100

DS settlement efficiency (%)

Water Quality

This section is relevant only to Water Quality Simulations. If the icon is at the start of a paragraph, then that paragraph is only relevant to water quality simulations. If the icon is at the top of a topic, or a section (underneath a section title), or a row in a table, then the complete topic, section or row is only relevant to water quality simulations.

See US settlement efficiency.

ds_settlement_eff

Long Integer

0

0

0

100

Invert level

Invert level measured above system datum.

invert

Double

Z

3

-9999

9999

Reverse flow model

Determines how the engine models reverse flow: either as a nominal headloss or by using the culvert outlet model.

reverse_flow_model

Text

8

0

Nominal

The code assigned to this culvert.

The codes are based on culvert shape and material, and inlet and edge types as defined in the Hydraulic Design of Highway Culverts, Third Edition.

The selected code determines the values that the software automatically assigns to the K, M, c,Y and Inlet headloss coefficient (Ki) fields, if the #D flag is set on those fields. The assigned values are defined in the Hydraulic Design of Highway Culverts, Third Edition.

Equation

The equation used to calculate the water level immediately upstream of the inlet.

There are 2 forms of the equation defined in Hydraulic Design of Highway Culverts, Third Edition.

These two forms are equivalent to the equations defined in CIRIA Funders Report/CP/40, which are referred to in the Representation of Culverts in InfoWorks.

The values assigned to the fields K and M may change depending on which equation is selected, if the #D flag is set on those fields. The assigned values are defined in the Hydraulic Design of Highway Culverts, Third Edition.

equation

Text

1

0

A

K

Unsubmerged inlet control loss coefficient.

If the #D flag is set on this field, the value is set by the software when a Culvert code is selected.

The assigned value may change depending on which Equation is selected.

k

Double

4

0.005

0.0001

M

Exponent of flow intensity for inlet control.

If the #D flag is set on this field, this value is automatically set by the software when a Culvert code is selected.

The assigned value may change depending on which Equation is selected.

m

Double

3

1.0

0.01

c

Submerged inlet control loss coefficient.

If the #D flag is set on this field, the value is automatically set by the software when a Culvert code is selected.

c

Double

4

0.03

0.01

Y

Submerged inlet control adjustment factor.

If the #D flag is set on this field, the value is automatically set by the software when a Culvert code is selected.

y

Double

2

0.75

0.01

Inlet headloss coefficient (Ki)

The inlet headloss coefficient constant.

If the #D flag is set on this field, the value is automatically set by the software when a Culvert code is selected.

headloss_coeff

Double

2

0.5

0.01

Outlet headloss coefficient (Ko)

Only displayed when Reverse flow model is set to OUTLET.

Outlet headloss coefficient, usually 1.0

outlet_headloss_coeff

Double

2

1

0.01

Points

This field defines the geometry of the link. The underlying data consists of a series of (x,y) pairs defining the vertices of the link. Each link is made up of a series of straight lines between the defined (x,y) points.

This data is not displayed on the grid or property sheet.

Link Vertice Export

Link vertices are included when you export link data to CSV files. There are two options available for exporting link vertices. These are selected on the Select CSV Export Options Dialog using the Coordinate Arrays Format dropdown list. The options are:

• Packed - The data is exported as a series of x,y pairs.



• Separately - the data is appended to the end of the row containing the link data. Each x and y value is in a separate (comma separated) field.

point_array

Array

XY

0