DOI: 10.1016/j.atmosenv.2014.05.044
Scopus记录号: 2-s2.0-84901349034
论文题名: An assessment indicator for air ventilation and pollutant dispersion potential in an urban canopy with complex natural terrain and significant wind variations
作者: Yim S ; H ; L ; , Fung J ; C ; H ; , Ng E ; Y ; Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 94 起始页码: 297
结束页码: 306
语种: 英语
英文关键词: Pollutant dispersion
; Urban canopy drag
; Urban ventilation
Scopus关键词: Air
; Drag
; Assessment indicator
; Diurnal variation
; Highly urbanized areas
; Pollutant dispersions
; Urban canopies
; Urban ventilation
; Wind characteristics
; Wind speed and directions
; Urban growth
; atmospheric pollution
; complex terrain
; dispersion
; diurnal variation
; drag
; environmental indicator
; seasonal variation
; spatial distribution
; urban atmosphere
; urban planning
; ventilation
; wind direction
; air conditioning
; air pollutant
; article
; canopy
; circadian rhythm
; city planning
; dispersion
; Hong Kong
; priority journal
; summer
; topography
; urban area
; wind
; winter
; China
; Hong Kong
; Hong Kong Island
; Kowloon
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: In an urban planning context, an assessment indicator for evaluating a city's dispersion potential is beneficial, especially if the city has a complex natural terrain and significant wind variations. A study was conducted to implement an urban canopy drag indicator, taking site wind variation into account by involving both wind speed and direction in the calculations. Hong Kong (HK) was taken as an example due to its complicated natural topography and wind characteristics. A spatial distribution of an urban canopy drag over HK was determined based on wind data from 2004. The urban canopy drag values in three highly urbanized areas in HK, including Kowloon West, Kowloon East and Hong Kong Island North, were obtained and are discussed in detail. A fluid particle tracking program was developed and applied to identify the major wind paths in Kowloon West, with an area of approximately 5.5×6km as an example. We analyzed the diurnal variation in the dispersion times and the major wind paths in the region during both summer and winter. Our results estimated that the horizontal dispersion times of Kowloon West during both winter and summer were approximately 20min. By combining the wind paths from both seasons, we identified several major wind paths and critical ventilation areas in Kowloon West. This paper demonstrates the potential use of an urban canopy drag indicator for assessing air ventilation and pollutant dispersion in a city planning context. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81098
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong; Department of Mathematics, The Hong Kong University of Science and Technology, Hong Kong; Division of Environment, The Hong Kong University of Science and Technology, Hong Kong; Department of Architecture, The Chinese University of Hong Kong, Hong Kong
Recommended Citation:
Yim S,H,L,et al. An assessment indicator for air ventilation and pollutant dispersion potential in an urban canopy with complex natural terrain and significant wind variations[J]. Atmospheric Environment,2014-01-01,94