Sluice Linear Structure (2D) Data Fields
Sluice Linear Structure (2D) data can be edited on either the Sluice Linear Structure (2D) Grid Window of the Lines Grid or the Sluice Linear Structure (2D) Property Sheet.
Most data can be edited on the grid, but some fields cannot be displayed in the grid format.
To view and edit all sluice linear structure (2D) data, use the Property Sheet.
The following describes all the data which can be used to define a Sluice Linear Structure (2D) object.
Fields that are common to the majority of objects can be found in the Common Fields topic.
Sluice Linear Structure (2D) Data
Database Table Name: hw_2d_sluice
Field Name |
Help Text |
Database Field |
Size |
Precision |
Default |
Error Lower Limit |
Error Upper Limit |
Warning Lower Limit |
Warning Upper Limit |
||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID |
ID of the line. |
line_id |
Text |
64 |
|
0 |
|
0 |
0 |
0 |
0 |
||||||||||||
Asset ID |
For reference only. Designed as a reference to an asset database, but could be used for anything. |
asset_id |
Text |
64 |
|
0 |
|
|
|
|
|
||||||||||||
Discharge coefficient |
Where gates are fully submerged the behaviour is generally in a manner predicted by the discharge theory for an orifice. A typical overall velocity and contraction coefficient is therefore the default value of 1.0. |
discharge_coeff | Double | 2 | 1 | 0.01 | |||||||||||||||||
Secondary discharge coefficient |
Applies when the depth of water is less than the opening of the gate, and weir equations apply. |
secondary_discharge_coeff | Double | 2 | 0.01 | ||||||||||||||||||
Overgate discharge coefficient |
Enabled when Overtopping flow type is set to Controlled. Applies when the gate is overtopped. |
overgate_discharge_coeff | Double | 2 | 1 | 0.01 | |||||||||||||||||
Opening height | Height of opening of sluice gate. | opening | Double | L | 3 | 0 | |||||||||||||||||
Gate depth |
Depth of gate (dimension from bottom to top of gate). |
gate_depth | Double | L | 3 | 0 | |||||||||||||||||
Length |
Length of the structure. |
length | Single | L | 3 | ||||||||||||||||||
Start length |
Determines the location of the sluice along the associated base linear structure. Sluice starts at length measured from the start of the base linear structure. |
start_length | Double | L | 3 | 0.0 | |||||||||||||||||
Linear Structure (2D) ID |
ID of associated Base Linear Structure (2D) object. |
linear_structure_id | Text | 64 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||
Invert level |
Method of specifying invert level.
|
crest_level | Text | 20 | 0 | Level | 0 | 0 | 0 | 0 | |||||||||||||
Level |
Enabled if Invert level of type Level is selected. Height above datum of the sluice gate invert. |
level | Double | Z | 3 | 0.0 | |||||||||||||||||
Height |
Enabled if Invert Level of type Height is selected. Height of the sluice gate invert from ground level. For each segment of structure, this is the height above the highest of the ground levels of the two computational elements either side of the structure. |
height | Double | Y | 3 | 0.0 | 0 | ||||||||||||||||
Flow type |
Method of flow calculation for flow through the gate. All three modes are fully mass and momentum conservative.
|
flow_type | Text | 10 | 0 | Free | 0 | 0 | 0 | 0 | |||||||||||||
Overtopping flow type |
Method of flow calculation for flow overtopping the structure. Both modes are fully mass and momentum conservative.
|
over_flow_type | Text | 10 | 0 | Controlled | 0 | 0 | 0 | 0 | |||||||||||||
Blockage |
Blockage factor between 0 and 1, where 0 represents no blockage and 1 represents fully blocked (no flow can pass through sluice). See Base Linear Structures (2D) for further information. |
blockage | Double | 3 | 0.0 | 0 | 1 | ||||||||||||||||
Headloss specification |
Indicates how the headloss coefficient is to be specified. This can be set to:
See Base Linear Structures (2D) for further information. |
headloss_spec | Text | 25 | 0 | Uniform | 0 | 0 | 0 | 0 | |||||||||||||
Headloss coefficient type |
Indicates the type of headloss coefficient to be used. This can be set to:
See Base Linear Structures (2D) for further information. |
headloss_type | Text | 20 | 0 | Fixed | 0 | 0 | 0 | 0 | |||||||||||||
Unit headloss coefficient |
Enabled when Headloss specification is either not set or set to Uniform, and Headloss coefficient type is either not set or set to Per unit length. Head loss coefficient per unit length that applies to the adjacent elements of the line structure. See Base Linear Structures (2D) for further information. |
headloss_coeff | Double | UHC | 3 | 0.0 | 0 | ||||||||||||||||
US unit headloss coefficient |
Enabled when Headloss specification is set to Upstream & downstream, and Headloss coefficient type is either not set or set to Per unit length. Headloss coefficient per unit length that applies to the upstream element of the line structure. See Base Linear Structures (2D) for further information. |
us_unit_headloss_coeff | Double | UHC | 3 | 0.0 | 0 | ||||||||||||||||
DS unit headloss coefficient |
Enabled when Headloss specification is set to Upstream & downstream, and Headloss coefficient type is either not set or set to Per unit length. Headloss coefficient per unit length that applies to the downstream element of the line structure. See Base Linear Structures (2D) for further information. |
ds_unit_headloss_coeff | Double | UHC | 3 | 0.0 | 0 | ||||||||||||||||
Headloss coefficient |
Enabled when Headloss specification is either not set or set to Uniform, and Headloss coefficient type is set to Fixed. Head loss coefficient that applies to the adjacent elements of the line structure. See Base Linear Structures (2D) for further information. |
headloss_coeff2 | Double | 3 | 0.0 | 0 | |||||||||||||||||
US headloss coefficient |
Enabled when Headloss specification is set to Upstream & downstream, and Headloss coefficient type is set to Fixed. Headloss coefficient that applies to the upstream element of the line structure. See Base Linear Structures (2D) for further information. |
us_headloss_coeff | Double | 3 | 0.0 | 0 | |||||||||||||||||
DS headloss coefficient |
Enabled when Headloss specification is set to Upstream & downstream, and Headloss coefficient type is set to Fixed. Headloss coefficient that applies to the downstream element of the line structure. See Base Linear Structures (2D) for further information. |
ds_headloss_coeff | Double | 3 | 0.0 | 0 | |||||||||||||||||
Lateral friction coefficient |
Coefficient of energy loss caused by the friction of the flow against the line structure in the tangential direction. See Base Linear Structures (2D) for further information. |
lateral_friction | Double | 4 | 0.0 | 0 | |||||||||||||||||
No reverse flow |
Check this option to define the structure as unidirectional - flow is only allowed to flow from the structure's upstream side to its downstream side; no reverse flow is allowed. If this option is unchecked, the structure is taken to be bidirectional and flow will be allowed in both directions. |
use_direction | Boolean | 0 | 0 | ||||||||||||||||||
Points |
This field defines the geometry of the line. 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:
|
point_array | Array | XY | 0 |