期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：1992
卷号：XXIX Part B7
页码：8-12
出版社：Copernicus Publications
摘要：Land roughness is the main factor causing the diffusion of mechanical turbulencenear the ground surface, the main conclusions of which are obtained via theinterpretation of the Shanghai colour infrared aerial maps with 1:5000 and by thenumerical calculation method: first, the land roughness from 0 to I metre underdifferent wind directions occupies an absolute dominant position in Shanghai,while the average land roughness greater than 5 metres is less than 9%; secondly,the regional distribution of vertical turbulent diffusion in Shanghai can bedivided into five scales from A to E. Notwithstanding the directions of the wind,diffusion conditions in the city proper are all less than or equal to level B.The diffusion model in the form of discontinuous polygonal frame under the northor south wind directions can match the distribution of the pollutant concentrationvery well
