Roughness effects on urban turbulence parameters |
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| Authors: | Metin Yersel Robert Goble |
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| Institution: | (1) Department of Natural Sciences, Lyndon State College, 05851 Lyndonville, Vermont, USA;(2) Department of Physics and Center for Environment, Technology and Society, Clark University, 01610 Worcester, Massachussets, USA |
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| Abstract: | Urban roughness lengths are estimated from measurements of u and u
*
at one level under neutral conditions, assuming a logarithmic form for the vertical profile of wind velocity. At a given location in the urban area, estimated values show considerable directional variation. The dependence of some turbulence parameters on the urban roughness lengths is experimentally investigated during near-neutral conditions. The ratios 
i
/u
*
decrease with roughness whereas the turbulence intensities
i
/u increase with it. The dependence on roughness is not the same for all components. |
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| Keywords: | |
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