Open AccessDetermination of the surface roughness length for use in mesoscale air quality modelling
Author(s) -
T.C.M Vleggaar,
O. L. Fourie
Publication year - 1987
Publication title -
clean air journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.239
H-Index - 4
eISSN - 2410-972X
pISSN - 1017-1703
DOI - 10.17159/caj/1987/7/3.7282
Subject(s) - mesoscale meteorology , wind speed , environmental science , surface roughness , air quality index , meteorology , roughness length , surface (topology) , surface finish , cover (algebra) , wind profile power law , mathematics , geography , materials science , engineering , geometry , mechanical engineering , composite material
The surface roughnesss legth z0 is an important parameter in air quality modelling. Methods for estimating this parameter for the Estaern Highveld, using availabe data, were investigated. The use of existing geographical maps to determine land cover suffers from certain deficiences. Tethersonde wind speed profiles were found to be inadequate for the purpose of the determination of z0, and it would seem that time-averaged wind speed measurements along a mast are required