Influence of spatial structure of road greening on particle diffusion

In order to study the influence of the transparency and crown density of road green belts on particle dispersion, the green belts along Tinjing highway in Tianjin, China, were selected to study in this study and the green space was divided into four types, which respectively were the high crown density-high transparency green space, the low crown density-low transparency green space, the high crown density-low transparency green space and the low crown density-high transparency green space. The particle pollution concentration in sidewalk and green space was researched in the four types of green space. It was concluded that: in the sidewalk, the high crown density-high transparency green space was the most adverse to the diffusion of automobile exhaust pollutants because those contents of pm2.5, pm10 and dust were all the highest; in the green space, the high crown density-high transparency green space and the low crown density-low transparency green space were the most adverse to the diffusion of automobile exhaust pollutants because those contents of pm2.5, pm10 and dust were all the highest. So among the four types of green space, the high crown density-high transparency green space was the most adverse to pollutant diffusion. (paper)