城市空气输送通道的布置与节约城市建设用地关系的研究

在污染源一定的条件下,城市的风(风向和风速)对城市的空气更新起着重要的作用。论述了微风条件下城市街道峡谷中的大气污染浓度变化与路面温度、街道空间结构及风等的关系。提出城市应规划顺风向的城市交通干道作为城市排气通道,其宽度、空间结构、绿化种植及路面铺装等均应以街谷内大气污染浓度快速降低为原则设置。城市应另外开辟以城市绿地为主的鲜风通道以供新鲜空气进入城市进行空气更新,并探讨了鲜风通道的布置原理和宽度计算方法;比较了不同布置形态的城市所需鲜风通道的宽度和面积的差异,得出合理的城市规划布局可以有效节省鲜风通道面积的结论。

Study on the Relationship between Urban Air Transportation Corridors and the Layout of Urban Construction Land Conservation

In the situation that city's pollution source be determinate, city wind has an important function to update the city's air. The article discussed under the breeze weather in the city street canyon air pollution concentration's relationship with the pavement temperature, street space structure and wind et al. It is proposed that urban planning should be made downwind of the urban transport corridors to the city as the exhaust channel, and its width, space structures, planting and greening, such as pavement should be able to quickly reduce the concentration of air pollution. Urban green space for fresh air into the city to update the air (called fresh air channel) should be planed individually. And the paper researched the fresh air channel layout principles and width calculation methods, compared different forms of urban layout for fresh air channel and the width of the different fresh air channel, and obtained that reasonable urban planning layout can be effective and economical in taking the fresh wind channel the city green area.