Terrain bowen ratio (Heat Overlay): Difference between revisions

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* 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.
* 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.
* 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. The night value 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.


==See also==
==See also==

Revision as of 15:11, 13 February 2020

Template:Overlay attribute

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