北京市不同功能区冬季道路扬尘排放特征

Characteristics of dust emissions from roads in different functional areas of Beijing

以北京市东城区、朝阳区、顺义区、平谷区分别代表首都功能核心区、城市功能拓展区、城市发展新区、生态涵养区,分析四大功能区冬季道路扬尘排放特征。采用AP-42方法和移动式检测系统对各功能区不同类型道路采集扬尘数据,建立各功能区道路扬尘排放清单,并利用ArcGIS中的北京市路网数据制作各功能区道路扬尘排放空间分布图。结果表明:核心区、拓展区的各类型道路积尘负荷平均值为支路>次干道>主干道>快速路;发展新区、生态涵养区的各类型道路积尘负荷平均值为村道>乡道>县道>省道>国道。核心区、拓展区的道路扬尘排放总量较小,而单位面积道路扬尘排放量较大;发展新区、生态涵养区的道路扬尘排放总量较大,而单位面积道路扬尘排放量较小。

Taking Dongcheng District,Chaoyang District,Shunyi District and Pinggu District as representative of capital functional core area,urban functional expansion area,new urban development area and ecological conservation area,the characteristics of road dust emission in Beijing's four major functional areas were analyzed.The AP-42 method and mobile detection system was used to collect road dust from different types of roads in different areas and establish the inventory of road dust emission in each district,and the spatial distribution map of road dust emission in each district was made by using the data of Beijing road network in ArcGIS.The results showed that the average dust load of all types of roads in the core area and expansion area was branch road>sub-main road>main road>expressway.The average dust load of all types of roads in new urban development area and ecological conservation area was village road>township road>county road>provincial road>national road.The total amount of road dust emission in core area and expansion area was smaller,and the amount of road dust emission per unit area was larger;while the total amount of road dust emission in new development area and ecological conservation area was larger,and the amount of road dust emission per unit area was smaller.