Terrain bowen ratio (Heat Stress Overlay): Difference between revisions

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{{Overlay attribute
{{terrain attributes
|attribute=BOWEN_RATIO
| <onlyinclude>
|unit=ratio
{{terrain attributes|type=row|group=Heat Stress Overlay
|terraintype=Surface
|attribute=BOWEN_RATIO
|description=Describes the rate of heat transfer for a surface that has moisture as a factor.
|unit=ratio
|icon=
|layer=Surface
}}
|description=Describes the rate of heat transfer for a surface that has moisture as a factor.
|icon=
}} </onlyinclude>}}


==See also==
The Bowen ratio{{ref|bowen}} 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.
* [[Bowen ratio (Heat Overlay)|Bowen ratio]]


{{Template:HeatOverlay_model_attribute_nav}}
{{article end
|notes=
* The {{Heat DPRA Report}} uses only two possible values for the Bowen ratio: 0.4 and 3.0.
* Terrains such as grassland and [[function]]s such as trees and vegetation generally have a ratio of 0.4. Other terrains and functions have a ratio of 3.0.
* Water is special in the sense that during the day the ratio is 0.4 and at night the ratio is 3.0. These values are based on the {{Heat DPRA Report}} and cannot be modified.
|seealso=
* [[Bowen ratio (Heat Stress Overlay)]]
* [[Bowen ratio result type (Heat Stress Overlay)]]
* [[PET formulas (Heat Stress Overlay)]]
|references=
<references>
{{ref|bowen
  |name=Bowen Ratio
  |author=
  |page=
  |source=Wikipedia
  |link=https://en.wikipedia.org/wiki/Bowen_ratio
  |lastvisit=2019-12-16
}}
</references>
}}


{{Template:Heat_Module_buttons}}
{{HeatOverlay model attribute nav}}

Latest revision as of 13:47, 13 April 2026

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

The Bowen ratio[1] 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.

Notes

  • The DPRA Heat stress report uses only two possible values for the Bowen ratio: 0.4 and 3.0.
  • Terrains such as grassland and functions such as trees and vegetation generally have a ratio of 0.4. Other terrains and functions have a ratio of 3.0.
  • Water is special in the sense that during the day the ratio is 0.4 and at night the ratio is 3.0. These values are based on the DPRA Heat stress report and cannot be modified.

See also

References

  1. ↑ Bowen Ratio ∙ Wikipedia ∙ Found at: https://en.wikipedia.org/wiki/Bowen_ratio ∙ (last visited: 2019-12-16)
Heat Stress Module
Heat Stress Module
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Group
Model attributes
Daily average radiation • Daily average wind speed • Daily maximum temperature • Daily minimum temperature • Dates • Exclude buildings • Exclude water • Exclude foliage height m • Foliage areas • Hourly humidity • Hourly radiation • Hourly temperature • Max shadow distance • Sun altitude • Sun azimuth • Sun daily motion • Wind direction • Wind speed • Wind decline angle
Building attributes
Bowen ratio • Foliage height • Foliage crown factor • Vegetation fraction
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Building elevation • Foliage height • Terrain elevation
Related
Calculation models and formulas • Feature attributes • Model attributes • Result types


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