Terrain bowen ratio (Heat Stress Overlay): Difference between revisions
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{{terrain attributes | {{terrain attributes | ||
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{{terrain attributes|type=row|group=Heat Overlay | {{terrain attributes|type=row|group=Heat Stress Overlay | ||
|attribute=BOWEN_RATIO | |attribute=BOWEN_RATIO | ||
|unit=ratio | |unit=ratio | ||
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* 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. | * 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= | |seealso= | ||
* [[Bowen ratio (Heat Overlay)]] | * [[Bowen ratio (Heat Stress Overlay)]] | ||
* [[Bowen ratio result type (Heat Overlay)]] | * [[Bowen ratio result type (Heat Stress Overlay)]] | ||
* [[PET formulas (Heat Overlay)]] | * [[PET formulas (Heat Stress Overlay)]] | ||
|references= | |references= | ||
<references> | <references> | ||
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{{HeatOverlay model attribute nav}} | {{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
- Bowen ratio (Heat Stress Overlay)
- Bowen ratio result type (Heat Stress Overlay)
- PET formulas (Heat Stress 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
- Related