Bowen ratio (Heat Overlay): Difference between revisions
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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. | 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. | ||
{{article end | {{article end | ||
|notes= | |notes= | ||
* The {{Heat DPRA Report}} uses only two possible values for the Bowen ratio: 0.4 and 3.0. | * The {{Heat DPRA Report}} uses only two possible values for the Bowen ratio: 0.4 and 3.0. | ||
* By default, [[ | * 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= | |seealso= | ||
* [[Terrain bowen ratio (Heat Overlay)]] | * [[Terrain bowen ratio (Heat Overlay)]] | ||
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|references= | |references= | ||
<references> | <references> | ||
{{ref|bowen | |||
|name=Bowen Ratio | |||
|author= | |||
|page= | |||
|source=Wikipedia | |||
|link=https://en.wikipedia.org/wiki/Bowen_ratio | |||
|lastvisit=2019-12-16 | |||
}} | |||
</references> | </references> | ||
}} | }} | ||
{{HeatOverlay model attribute nav}} | {{HeatOverlay model attribute nav}} | ||
Latest revision as of 10:08, 17 October 2025
| 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[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.
- 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
- Terrain bowen ratio (Heat Overlay)
- Bowen ratio result type (Heat Overlay)
- PET formulas (Heat Overlay)
References
- ↑ Bowen Ratio ∙ Wikipedia ∙ Found at: https://en.wikipedia.org/wiki/Bowen_ratio ∙ (last visited: 2019-12-16)
- 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
- Building elevation • Foliage height • Terrain elevation
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