Weir angle (Water Overlay): Difference between revisions

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{{overlay attribute
[[File:Weir_angle_explain_(Water_Overlay).png|thumb|right|x300px]]
|key=[[Weir_angle_(Water_Overlay)|WEIR_ANGLE]]
{{Overlay keys|<onlyinclude>
{{Overlay keys|type=row|group=Water Overlay
|key=WEIR_ANGLE
|unit={{geoangle}}
|unit={{geoangle}}
|description=The top down orientation angle of the weir.
|description=The top down orientation angle of the [[Weir (Water Overlay)|weir]].
|defaultvalue=0
|defaultvalue=0
|icon=[[File:waterwizard_icon_weir_angle.png]]
|icon=waterwizard_icon_weir_angle.png
|range=-{{doublemaxvalue}} to {{doublemaxvalue}}
}}</onlyinclude>}}
 
The weir angle is used to convert a weir loaded in as point-based data to a line which is used in the simulation to define from where to where the water should flow across the weir.
In the Water Wizard a weir angle is automatically generated. There are currently 4 options on how this is (automatically) generated:
# The weir is located on the edge of 2 water level areas. The weir is then automatically installed correctly and no message is displayed. A note about this option is necessary: The weirs are automatically well oriented, but the waterways are not blocked, which means that water can flow past the weirs. That is why we recommend using a dataset in which the attribute is already present, because then the block is in effect.
# The weir is located in exactly 1 level area. Then the warning appears that the weir has no angle, with the option to fix it.
# The weir is located in exactly 0 level areas. Then a comment is displayed about the absence of a water level area.
# The weir angle attribute is pre-added to a dataset and this dataset is imported into the project. No angle needs to be generated automatically.
 
[[File:Set_Multi_Weir_value.jpg|thumb|left|x200px|The weir angle is adjustable in the weir step of a [[Water Overlay]] wizard]]
{{article end
|notes=
* The width of the generated dam is equal to the weir's [[Weir width (Water Overlay)|WEIR_WIDTH]], multiplied by the [[Weir dam multiplier (Water Overlay)|WEIR_DAM_MULTIPLIER]] of the [[Water Overlay]].
* If a weir angle is available for a weir which is already line-shaped, the weir is first interpreted as a point, and then the direction and elevation are adjusted accordingly. The centre of the weir's polygon is used.
* If no angle is available as an attribute, the angle weir angles are automatically oriented based on the water level areas.
* The weir angle is automatically converted to a range within 0 and 360.
|seealso=
* [[Weir width (Water Overlay)]]
* [[Weir dam multiplier (Water Overlay)]]
|howtos=
}}
}}
[[File:Weir_angle_explain_(Water_Overlay).png|thumb|right|x300px]]
The weir angle is used to convert a weir loaded in as point-based data to a line which is used in the simulation to define from where to where the water should flow across the weir. It also automatically adjusts the elevation perpendicular to the direction of the weir, so that water can only flow from one side of the weir to the other through the weir, rather than around it.
{{clear}}


==Notes==
[[File:Weirs_angel.jpg|thumb|right|x300px]]
* If a weir angle is available for a weir which is already line-shaped, the weir is first interpreted as a point, and then the direction and elevation are adjusted accordingly. The centre of the weir's polygon is used.
* If no angle is available as an attribute, the angle can be calculated by using the Generate Angles option in the Weirs step of the wizard.
{{WaterOverlay hydraulic structure nav}}
{{WaterOverlay hydraulic structure nav}}

Latest revision as of 15:30, 26 February 2024

Weir angle explain (Water Overlay).png
Icon Key Unit Range Description Default value
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

The weir angle is used to convert a weir loaded in as point-based data to a line which is used in the simulation to define from where to where the water should flow across the weir. In the Water Wizard a weir angle is automatically generated. There are currently 4 options on how this is (automatically) generated:

  1. The weir is located on the edge of 2 water level areas. The weir is then automatically installed correctly and no message is displayed. A note about this option is necessary: The weirs are automatically well oriented, but the waterways are not blocked, which means that water can flow past the weirs. That is why we recommend using a dataset in which the attribute is already present, because then the block is in effect.
  2. The weir is located in exactly 1 level area. Then the warning appears that the weir has no angle, with the option to fix it.
  3. The weir is located in exactly 0 level areas. Then a comment is displayed about the absence of a water level area.
  4. The weir angle attribute is pre-added to a dataset and this dataset is imported into the project. No angle needs to be generated automatically.
The weir angle is adjustable in the weir step of a Water Overlay wizard

Notes

  • The width of the generated dam is equal to the weir's WEIR_WIDTH, multiplied by the WEIR_DAM_MULTIPLIER of the Water Overlay.
  • If a weir angle is available for a weir which is already line-shaped, the weir is first interpreted as a point, and then the direction and elevation are adjusted accordingly. The centre of the weir's polygon is used.
  • If no angle is available as an attribute, the angle weir angles are automatically oriented based on the water level areas.
  • The weir angle is automatically converted to a range within 0 and 360.

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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