Weir (Water Overlay): Difference between revisions

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{{Water Module buttons}}
Weirs are effectively small dams in the water, and allow water to flow from a water body with a higher water level to a lower water level. Any water exceeding the height of the weir can flow over it, increasing the throughput as the water level increases. Strictly, water can flow over the weir in either direction.
 
[[File:waterwizard_icon_weir.png]] A weir is a [[Line-based_building_(Water_Overlay)|line-based building]].


Weirs are effectively small dams in the water, and allow water to flow from a water body with a higher water level to a lower water level. Any water exceeding the height of the weir can flow over it, increasing the throughput as the water level increases. Strictly, water can flow over the weir in either direction.
{{Overlay keys|suppresscategory=true|
{{:weir height (Water Overlay)}}
{{:weir width (Water Overlay)}}
{{:weir angle (Water Overlay)}}
{{:weir coefficient (Water Overlay)}}
{{:weir target level (Water Overlay)}}
}}


[[File:waterwizard_icon_weir.png]] A weir is a [[Line-based_construction_(Water_Overlay)|line-based construction]].
{{article end
{{overlay attribute
|notes=
|attribute=[[Weir_height_(Water_Overlay)|WEIR_HEIGHT]]
* If a weir is placed in a waterway, and the waterway is not otherwise interrupted, water might be able to flow past the weir via the waterway itself. In order to obstruct the waterway, one of two options can be chosen:
|unit={{mdatum}}
** Define the [[Weir_angle_(Water_Overlay)|weir angle]], in which case the {{software}} will automatically raise the DEM in the simulation based on the position, [[Weir_width_(Water_Overlay)|width]] and angle of the weir.
|description=The height of the weir. Water can flow past the weir when the water level exceeds the weir's height.
** Manually raise  the [[terrain height (Water Overlay)|terrain height]] using the terrain height tool or applying a terrain height GeoTIFF.
|defaultvalue=n/a
* Weirs can be read in as a point. The {{software}} will precompute how the weir should be modeled as a line.
|icon=[[File:waterwizard_icon_weir_height.png]]
|howtos=
|attribute2=[[Weir_width_(Water_Overlay)|WEIR_WIDTH]]
* [[How to correct multiple buildings on the same location]]
|unit2=m
* [[How to correct weir, pump, or culvert drawn as point]]
|description2=The width of the weir.
* [[How to correct a building in an uninterrupted waterway]]
|defaultvalue2=5
* [[How to correct a building at the edge of the project area]]
|icon2=[[File:waterwizard_icon_weir_width.png]]
|seealso=
|attribute3=[[Weir_angle_(Water_Overlay)|WEIR_ANGLE]]
* [[Weir formula (Water Overlay)]]
|unit3=°
* [[Weir height test case (Water Module)]]
|description3=The orientation angle of the weir.
|defaultvalue3=
|icon3=[[File:waterwizard_icon_weir_angle.png]]
|attribute4=[[Weir_coefficient_(Water_Overlay)|WEIR_COEFFICIENT]]
|unit4=coefficient
|description4=The flow coefficient related to the shape of the weir.
|defaultvalue4=1,1
|icon4=[[File:waterwizard_icon_weir_coefficient.png]]
}}
}}
==Notes==
* If a weir is placed in a waterway, and the waterway is not otherwise interrupted, water will be able to flow past the weir via the waterway itself. It is recommended to make sure that the waterway is obstructed by an increase in the [[terrain height (Water Overlay)|terrain height]] in such a way that the only way water can flow from the one end of the weir to the other is via the weir.


==See also==
* [[Weir formula (Water Overlay)|Weir formula]]
{{WaterOverlay hydraulic structure nav}}
{{WaterOverlay hydraulic structure nav}}

Latest revision as of 09:30, 17 January 2023

Weirs are effectively small dams in the water, and allow water to flow from a water body with a higher water level to a lower water level. Any water exceeding the height of the weir can flow over it, increasing the throughput as the water level increases. Strictly, water can flow over the weir in either direction.

Waterwizard icon weir.png A weir is a line-based building.

Notes

  • If a weir is placed in a waterway, and the waterway is not otherwise interrupted, water might be able to flow past the weir via the waterway itself. In order to obstruct the waterway, one of two options can be chosen:
    • Define the weir angle, in which case the Tygron Platform will automatically raise the DEM in the simulation based on the position, width and angle of the weir.
    • Manually raise the terrain height using the terrain height tool or applying a terrain height GeoTIFF.
  • Weirs can be read in as a point. The Tygron Platform will precompute how the weir should be modeled as a line.

How-to's

See also