Emission factor and inventory of paved road fugitive dust sources in the Pearl River Delta region

65 fugitive dust samples from different types of paved roads in Pearl River Delta(PRD) region were collected.Based on the collected activity data of vehicle flows,vehicle fleets and road length,2010-based road fugitive dust emission factors and inventories of PRD were developed following AP42 methodologies recommended by the USEPA,the spatial,temporal characteristics,and uncertainty of road fugitive dust emissions were analyzed.The results show that the road silt loadings of express way,national Level I,Level II,Level III and Level IV roads are 1.05 g·m-2、0.99 g·m-2、1.30 g·m-2、1.35 g·m-2and 1.45 g·m-2;the average fugitive dust emission factors of Total Suspended Particulate(TSP),PM 10 and PM 2.5 are 8.32 g·VKT-1、1.60 g·VKT-1and 0.39 g·VKT-1;while the emission inventories and their quantitative uncertainties of TSP,PM 10 and PM 2.5 are 2755.1 × 103t(-91.7% ~ 175.1%) 、528.8 × 103t(-91.6% ~ 178.9%) and 127.9 × 103t(-91.5% ~ 176.5%),respectively.