Bridge Inlet Data Fields
Bridge Inlet data can be edited on either the Bridge Inlet Grid Window of the Links Grid or the Bridge Inlet Property Sheet.
To view and edit all bridge inlet data, use the Property Sheet.
This table describes all the bridge inlet specific data which can be used to define a bridge inlet.
Fields that are common to the majority of objects can be found in the Common Fields topic.
Bridge Inlet Data
Database Table Name: hw_bridge_inlet
Show Columns |
Database Names |
Size, Type and Units |
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Defaults and Error Limits |
Field Name |
Help Text |
Database Field |
Size |
Precision |
Default |
Error Lower Limit |
Error Upper Limit |
Warning Lower Limit |
Warning Upper Limit |
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ID | Unique identifier for the bridge inlet | id | Text | 64 | 0 | |||||||||||||||||||||||||||
Bridge US node ID | Upstream node ID of bridge to which the inlet is associated. | bridge_us_node_id | Text | 64 | 0 | |||||||||||||||||||||||||||
Bridge link suffix | Link suffix of bridge to which the inlet is associated. | bridge_link_suffix | Text | 1 | 0 | 1 | ||||||||||||||||||||||||||
Asset ID | For reference only. Designed as a reference to an asset database, but could be used for anything. | asset_id | Text | 64 | 0 | |||||||||||||||||||||||||||
System type |
Choose the System Type from the dropdown list. See System Type for more information.
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system_type | Text | 10 | 0 | Other | ||||||||||||||||||||||||||
Invert level | Invert level measured above system datum | invert | Double | Z | 3 | -9999 | 9999 | 6000 | ||||||||||||||||||||||||
Reverse flow model |
Determines how the engine models reverse flow: either as a nominal headloss or by using the culvert outlet model.
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reverse_flow_model | Text | 8 | 0 | Nominal | ||||||||||||||||||||||||||
Equation |
Equation as defined in CIRIA Funders Report/CP/40, used to calculate the water level immediately upstream of the inlet.
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equation | Text | 1 | 0 | A | ||||||||||||||||||||||||||
K |
Unsubmerged inlet control loss coefficient |
k | Double | 4 | 0.0001 | |||||||||||||||||||||||||||
M |
Exponent of flow intensity for inlet control |
m | Double | 3 | 0.01 | |||||||||||||||||||||||||||
c |
Submerged inlet control loss coefficient |
c | Double | 4 | 0.01 | |||||||||||||||||||||||||||
Y |
Submerged inlet control adjustment factor |
y | Double | 2 | 0.01 | |||||||||||||||||||||||||||
Inlet headloss coefficient (Ki) | Constant as defined in CIRIA Funders Report/CP/40. | headloss_coeff | Double | 2 | 0.01 | |||||||||||||||||||||||||||
Outlet headloss coefficient (Ko) | Outlet Headloss Coefficient, usually 1.0. (CIRIA Funders Report/CP/40) | outlet_headloss_coeff | Double | 2 | 1 | 0.01 |