Culvert (Water Overlay): Difference between revisions

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Culverts are effectively tunnels or pipes directly connecting two bodies of water, and allow water to flow in either direction. Culverts can also be used to model tunnels on land, creating a hole which water can flow through when it is flowing over land. The throughput of a culvert is limited by its dimensions.
Culverts are effectively tunnels or pipes directly connecting two bodies of water, and allow water to flow in either direction. Culverts can also model land tunnels, allowing water to flow through while traversing land. The throughput of a culvert is limited by its dimensions.


Culverts are assumed to have a spherical cross-section.
Culverts are assumed to have a circular cross-section, and level (i.e. not inclined).


[[File:waterwizard_icon_culvert.png]] A culvert is a [[Line-based_construction_(Water_Overlay)|line-based construction]].
[[File:waterwizard_icon_culvert.png|75px]] A culvert is a [[Line-based_building_(Water_Overlay)|line-based building]].
{| class="wikitable"
 
! Icon
{{Overlay keys|suppresscategory=true|
! Attribute
{{:culvert diameter (Water Overlay)}}
! Unit
{{:culvert rectangular height (Water Overlay)}}
! Description
{{:culvert threshold (Water Overlay)}}
! Default
{{:culvert n (Water Overlay)}}
|-
}}
|[[File:waterwizard_icon_culvert_width.png]]
 
|[[Culvert_diameter_(Water_Overlay)|CULVERT_DIAMETER]]
{{article end
|m
|notes=
|The diameter of the culvert. For throughput calculations, the culvert is assumed to have a spherical cross-section.
* A default Culvert [[Function]] exists with the following properties:
|1
** ID: 938
|-
** Placement Type: HYBRID
|[[File:waterwizard_icon_culvert_height.png]]
** [[Category]]: UNDERGROUND
|[[Culvert_height_(Water_Overlay)|CULVERT_HEIGHT]]
** Attributes:
|{{mdatum}}
*** [[Culvert diameter (Water Overlay)|CULVERT_DIAMETER]] : 1.0;
|The height of the inner side of the culvert's underside (or the threshold height at which water starts flowing through the culvert). When set to a level below the terrain height at either its upstream or downstream end, the culvert's height will automatically attain a value equal to that of the highest terrain found at either of its endpoints.
*** [[Culvert n (Water Overlay)|CULVERT_N]] : 0.014;
|0
: The attributes of the default culvert can be [[How to change Function Values for a Function|changed]] using the [[Function Values Table]]
|-
* If a culvert is placed in a waterway, and the waterway is not otherwise interrupted, water will be able to flow past the culvert via the waterway itself. Ensure the waterway is obstructed by increasing the [[Elevation model (Water Overlay)|terrain height]], forcing water to flow exclusively through the culvert.
|[[File:waterwizard_icon_manning.png]]
|howtos=
|[[Culvert_n_(Water_Overlay)|CULVERT_N]]
* [[How to correct multiple buildings on the same location]]
|s/(m<sup>1/3</sup>)
* [[How to correct weir or pump or culvert drawn as point]]
|The manning value of the culvert's material, which influences the flow speed.
* [[How to correct a building in an uninterrupted waterway]]
|0,014
* [[How to correct a building at the edge of the project area]]
|}
* [[How to correct a culvert connecting two water level areas]]
==See also==
|seealso=
*[[Culvert_formula_(Water_Overlay)|Culvert formula]]
*[[Culvert formula (Water Overlay)]]
|api=
* [[Api session event editor overlay set key value]]
* [[Api session event editor building set attribute]]
* [[Api session event editor functionoverride set attribute]]
}}
<noinclude>
{{WaterOverlay hydraulic structure nav}}
{{WaterOverlay hydraulic structure nav}}
{{Water Module buttons}}
</noinclude>

Latest revision as of 14:00, 15 July 2026

Culverts are effectively tunnels or pipes directly connecting two bodies of water, and allow water to flow in either direction. Culverts can also model land tunnels, allowing water to flow through while traversing land. The throughput of a culvert is limited by its dimensions.

Culverts are assumed to have a circular cross-section, and level (i.e. not inclined).

A culvert is a line-based building.

Icon Key Unit Range Description Default value
CULVERT_DIAMETER m 0 to 10000 The inside diameter of the circular-shaped Culvert, or the inside width of a rectangular-shaped Culvert. 1
CULVERT_RECTANGULAR_HEIGHT m 0 to 10000 The inside height of a rectangular shaped Culvert. 0
CULVERT_THRESHOLD m + datum -10000 to 10000 The height of the inner side of the culvert's underside (or the threshold height at which water starts flowing through the culvert). Each end-point of a culvert will be put on the threshold height or the terrain height at that end-point, whichever value is the highest. -10000
CULVERT_N manning value 0 to 3.4028235E38 The manning friction value of the culvert's material, which influences the flow speed. 0,014

Notes

The attributes of the default culvert can be changed using the Function Values Table
  • If a culvert is placed in a waterway, and the waterway is not otherwise interrupted, water will be able to flow past the culvert via the waterway itself. Ensure the waterway is obstructed by increasing the terrain height, forcing water to flow exclusively through the culvert.

How-to's

See also

API Endpoints

Water Module
Water Module
Tutorials
Overview
Theory
Benchmarks
Group
Inlet
Inlet q • Inlet area • Inlet capacity •  Lower threshold •  Upper threshold • Inlet underground
Pump
Pump q •  Lower threshold •  Upper threshold • Pump angle • Pump capacity • Pump area
Culvert
Culvert diameter • Culvert rectangular height • Culvert threshold • Culvert n
Weir
Weir height • Weir width • Weir angle • Weir coefficient • Weir n • Weir target level
Sewer overflow
Sewer overflow • Sewer overflow speed
Drainage
Drainage q • Drainage datum • Drainage active • Drainage overflow threshold
Output
Object flow output • Object height output • Object datum output a • Object datum output b • Object water area output • Object width output • Weir dam output
Related
Building attributes • Hydrological features •  Terrain attributes • Model attributes • Results • Simulation data


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