Weir (Water Overlay): Difference between revisions

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[[File:waterwizard_icon_weir.png]] A weir is a [[Line-based_construction_(Water_Overlay)|line-based construction]].
[[File:waterwizard_icon_weir.png]] A weir is a [[Line-based_construction_(Water_Overlay)|line-based construction]].
{{overlay attribute
{{Overlay keys|suppresscategory=true|
|key=[[Weir_height_(Water_Overlay)|WEIR_HEIGHT]]
{{:weir height (Water Overlay)}}
|unit={{mdatum}}
{{:weir width (Water Overlay)}}
|description=The height of the weir. Water can flow past the weir when the water level exceeds the weir's height.
{{:weir angle (Water Overlay)}}
|defaultvalue=n/a
{{:weir coefficient (Water Overlay)}}
|icon=[[File:waterwizard_icon_weir_height.png]]
|key2=[[Weir_width_(Water_Overlay)|WEIR_WIDTH]]
|unit2=m
|description2=The width of the weir.
|defaultvalue2=5
|icon2=[[File:waterwizard_icon_weir_width.png]]
|key3=[[Weir_angle_(Water_Overlay)|WEIR_ANGLE]]
|unit3={{geoangle}}
|description3=The top down orientation angle of the weir.
|defaultvalue3=0
|icon3=[[File:waterwizard_icon_weir_angle.png]]
|key4=[[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==
 
{{article end
|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:
* 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_(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.
** 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.
** Manually raise  the [[terrain height (Water Overlay)|terrain height]] using the terrain height tool or applying a terrain height geotiff.
** Manually raise  the [[terrain height (Water Overlay)|terrain height]] using the terrain height tool or applying a terrain height geotiff.
* Weirs can be read in as a point. The {{software}} will precompute how the weir should be modeled as a line.
* Weirs can be read in as a point. The {{software}} will precompute how the weir should be modeled as a line.
 
|howtos=
==How to's==
* [[How to correct multiple constructions on the same location]]
* [[How to correct multiple constructions on the same location]]
* [[How to correct weir, pump, or culvert drawn as point]]
* [[How to correct weir, pump, or culvert drawn as point]]
* [[How to correct a construction in an uninterrupted waterway]]
* [[How to correct a construction in an uninterrupted waterway]]
* [[How to correct a construction at the edge of the project area]]
* [[How to correct a construction at the edge of the project area]]
|seealso=
* [[Weir formula (Water Overlay)]]
}}


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

Revision as of 12:54, 2 October 2020

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 construction.

Icon Key Unit Range Description Default value
Waterwizard icon weir height.png WEIR_HEIGHT m + datum -10000 to 10000 The height of the weir. Water can flow past the weir when the water level exceeds the weir's height. n/a
Waterwizard icon weir width.png WEIR_WIDTH m 0 to 10000 The width of the weir. 5
Waterwizard icon weir angle.png WEIR_ANGLE geo angle (0-360°) -1.7976931348623157E308 to 1.7976931348623157E308 The top down orientation angle of the weir. 0
Waterwizard icon weir coefficient.png WEIR_COEFFICIENT coefficient 0 to 10000 The flow coefficient related to the shape of the weir. 1,1

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

Water Module
Benchmarks button.png
Introduction button.png
Water Module
Benchmarks button.png
Getting started button.png
Tutorials
Benchmarks button.png
Overview button.png
Overview
Benchmarks button.png
Theory button.png
Theory
Benchmarks button.png
Benchmarks button.png
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 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 width output
Related
Building attributes • Hydrological features •  Terrain attributes • Model attributes • Results • Simulation data
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