External area (Water Overlay): Difference between revisions

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{{Overlay attribute
{{Overlay keys|<onlyinclude>
|attribute=[[External_area_(Water_Overlay)|EXTERNAL_AREA]]
{{Overlay keys|type=row|group=Water Overlay
|key=EXTERNAL_AREA
|unit=m²
|unit=m²
|description=The surface area of the external water body behind the breach. The larger the external water body, the more water can flow from it, and the smaller the effect of the inflow or outflow of water on the external water level.
|description=The surface area of the external water body behind the breach. The larger the external water body, the more water can flow from it (or into it), and the smaller the effect of the inflow or outflow of water on the external water level. When provided with a second value, this key will also define a bottom area for the external water body, transforming its cross-section from a rectangle to a trapezoid.
|defaultvalue=n/a
|defaultvalue=n/a
|icon=[[File:waterwizard_icon_external_area.png]]
|icon=waterwizard_icon_external_area.png
}}</onlyinclude>}}
 
[[File:external_water_body_trapezoid.png|left|External water body as a trapezoid]]
 
{{article end
|notes=
* When two values are set for this key, the first value will represent the surface area of the external water body and the second value will represent the bottom area of the external water body. The water body will be interpreted as a trapezoidal prism, with a length set to the square root of the surface area. This will cause the water level of the external water body to change at a non linear rate.
* When a [[Breach_input_area_(Water Overlay)|breach input area]] is defined, an external water body will not be created. Subsequently, the [[External_surface_level_(Water_Overlay)|EXTERNAL_SURFACE_LEVEL]], [[External_water_level_(Water_Overlay)|EXTERNAL_WATER_LEVEL]] and [[External_area_(Water_Overlay)|EXTERNAL_AREA]] attributes will be ignored.
|seealso=
* [[Breach growth formula (Water Overlay)]]
* [[Breach flow formula (Water Overlay)]]
* [[Weir formula (Water Overlay)]]
|howtos=
*[[How to add a breach with external area manually|How to add a breach with external area manually]]
}}
}}
{{WaterOverlay hydrological features nav}}
{{WaterOverlay hydrological features nav}}

Latest revision as of 15:14, 28 June 2023

Icon Key Unit Range Description Default value
Waterwizard icon external area.png EXTERNAL_AREA m² The surface area of the external water body behind the breach. The larger the external water body, the more water can flow from it (or into it), and the smaller the effect of the inflow or outflow of water on the external water level. When provided with a second value, this key will also define a bottom area for the external water body, transforming its cross-section from a rectangle to a trapezoid. n/a

External water body as a trapezoid

Notes

  • When two values are set for this key, the first value will represent the surface area of the external water body and the second value will represent the bottom area of the external water body. The water body will be interpreted as a trapezoidal prism, with a length set to the square root of the surface area. This will cause the water level of the external water body to change at a non linear rate.
  • When a breach input area is defined, an external water body will not be created. Subsequently, the EXTERNAL_SURFACE_LEVEL, EXTERNAL_WATER_LEVEL and EXTERNAL_AREA attributes will be ignored.

How-to's

See also

Water Module
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Water Module
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Tutorials
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Overview button.png
Overview
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Theory button.png
Theory
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Benchmarks button.png
Benchmarks
Group
Water area
Water level • Water relative
Sewer area
Sewer storage • Sewer pump speed
Inundation area
Inundation level
Aquifer
Aquifer kd • Aquifer datum
Breach
Breach height • Breach width • Breach angle • Breach coefficient • Breach speed • Breach input area • Breach level area • External surface level • External water level • External area
Rain area
Rain m
Limitation area
Limit area
Output
Object flow output • Object height output • Object datum output a • Object datum output b • Object width output
Related
Building attributes • Hydraulic structures •  Terrain attributes • Model attributes • Results • Simulation data
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