上海市通风廊道的识别及影响分析

Analysis of the Identification and Impact of Urban Ventilation Corridors in Shanghai

利用迎风面积密度参数计算的方法,对利于减少城市空气污染的通风廊道进行定量化的研究。以国际化大都市上海为例,计算城市迎风面积密度;定量识别城市通风廊道;探究上海城市的通风廊道特征及其影响。结果表明:冬季上海市外环线以内通风廊道存在3条,其中最北一条较宽;夏季上海市外环线以内通风廊道存在4条,其中最北和最南各一条较宽。同时,评估了上海城市的通风廊道对PM 2.5浓度分布的影响。

The method of calculating the frontal area density parameter was used to study the quantification of ventilation corridors for reducing the air pollution in urban areas.Taking Shanghai,an international metropolis,as an example,the urban frontal area density was calculated.The city ventilation corridors were quantified and identified.The characteristics of ventilated corridor of Shanghai city and its impact were investigated.The results show that there are three ventilation corridors within the Shanghai outer ring line during winter,the most north path is wider.Besides there are four corridors within the outer ring line of Shanghai in summer,the north and the south of which are wider.At the same time,the effect of the urban ventilation corridors on the distribution of PM2.5concentration was assessed.