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- Roughness_length abstract "Roughness length , is a parameter of some vertical wind profile equations that model the horizontal mean wind speed near the ground; in the log wind profile, it is equivalent to the height at which the wind speed theoretically becomes zero. In reality the wind at this height no longer follows a mathematical logarithm. It is so named because it is typically related to the height of terrain roughness elements. Whilst it is not a physical length, it can be considered as a length-scale a representation of the roughness of the surface.As an approximation, the roughness length is approximately one-tenth of the height of the surface roughness elements. For example, short grass of height 0.01m has a roughness length of approximately 0.001m. Surfaces are rougher if they have more protrusions. Forests have much larger roughness lengths than tundra, for example. Roughness length is an important concept in urban meteorology as the building of tall structures, such as skyscrapers, has an effect on roughness length and wind patterns.".
- Roughness_length wikiPageExternalLink search?id=aerodynamic-roughness-length1.
- Roughness_length wikiPageExternalLink search?id=roughness-length1.
- Roughness_length wikiPageExternalLink roughness.html.
- Roughness_length wikiPageExternalLink 663.html.
- Roughness_length wikiPageID "2519226".
- Roughness_length wikiPageRevisionID "602078829".
- Roughness_length hasPhotoCollection Roughness_length.
- Roughness_length subject Category:Atmospheric_dispersion_modeling.
- Roughness_length subject Category:Fluid_dynamics.
- Roughness_length comment "Roughness length , is a parameter of some vertical wind profile equations that model the horizontal mean wind speed near the ground; in the log wind profile, it is equivalent to the height at which the wind speed theoretically becomes zero. In reality the wind at this height no longer follows a mathematical logarithm. It is so named because it is typically related to the height of terrain roughness elements.".
- Roughness_length label "Roughness length".
- Roughness_length label "粗度係数".
- Roughness_length sameAs 粗度係数.
- Roughness_length sameAs m.07khx_.
- Roughness_length sameAs Q7370913.
- Roughness_length sameAs Q7370913.
- Roughness_length wasDerivedFrom Roughness_length?oldid=602078829.
- Roughness_length isPrimaryTopicOf Roughness_length.