Bowen ratio (Heat Overlay): Difference between revisions

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{{Overlay attribute
{{Building attributes
|attribute=BOWEN_RATIO
| <onlyinclude>
|unit=factor
{{Building attributes|type=row|group=Heat Overlay
|description=Described the rate of heat transfer for a surface that has moisture as a factor.
|attribute=BOWEN_RATIO
|unit=ratio
|functionvalue=Bowen ratio
|description=Describes the rate of heat transfer for a surface that has moisture as a factor.
|icon=
}} </onlyinclude>}}
 
The Bowen ratio is a property of a surface, specifically the ratio between two types of heat transfer (sensible heat and latent heat). The wetter the surface, the lower the ratio.<ref name="bowen" />
 
{{article end
|notes=
* The {{Heat DPRA Report}} uses only two possible values for the Bowen ratio: 0.4 and 3.0.
* By default, [[Function]]s such as trees and vegetation generally have a ratio of 0.4. Other functions have a ratio of 3.0.
* The value must be in the range of 0.001 to 10.
|seealso=
* [[Terrain bowen ratio (Heat Overlay)]]
* [[Bowen ratio result type (Heat Overlay)]]
* [[PET formulas (Heat Overlay)]]
|howtos=
|references=
<references>
<ref name="bowen">Wikipedia. Bowen Ratio. https://en.wikipedia.org/wiki/Bowen_ratio. Last visited: 16-12-2019</ref>
</references>
}}
}}


==Notes==
{{HeatOverlay model attribute nav}}
* {{Template:Heat DPRA Report}} uses only two possible values for the Bowen ratio: 0.4 and 3.0.
* Terrains such as grassland and [[Function|functions]] such as trees and vegetation generally have a ratio of 0.4.
* Water is special in the sense that during the day the ratio is 0.4 and at night the ratio is 3.0.
* The other functions and terrains have a Bowen ratio of 3.0
 
==See also==
* [[Bowen_ratio_result_type_(Heat_Overlay)|Bowen ratio overlay result]]
* [[PET_formulas_(Heat_Overlay)|PET formulas]]
* Wikipedia on [https://en.wikipedia.org/wiki/Bowen_ratio| Bowen ratio]
{{Template:HeatOverlay_model_attribute_nav}}

Latest revision as of 07:23, 24 January 2024

Icon Attribute Unit Range Description
BOWEN_RATIO ratio Describes the rate of heat transfer for a surface that has moisture as a factor.

The Bowen ratio is a property of a surface, specifically the ratio between two types of heat transfer (sensible heat and latent heat). The wetter the surface, the lower the ratio.[1]

Notes

  • The DPRA Heat stress report uses only two possible values for the Bowen ratio: 0.4 and 3.0.
  • By default, Functions such as trees and vegetation generally have a ratio of 0.4. Other functions have a ratio of 3.0.
  • The value must be in the range of 0.001 to 10.

See also

References

  1. ↑ Wikipedia. Bowen Ratio. https://en.wikipedia.org/wiki/Bowen_ratio. Last visited: 16-12-2019
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