Effects of Landscape Tree Species and Their Arrangement on PM sub( 2.5) Sedimentation - A Case Study of Beijing, China

This study considered the polluted Beijing in China as the study site. This study investigated the PM sub( 2.5) sedimentation data of 10 shrub and 11 arbor species to understand the PM sub( 2.5) holding capacities of the landscape tree species. This study also obtained PM sub( 2.5) concentration data from 35 air quality monitoring sites. The results of linear regression analysis showed that a closely linear relationship exists between PM sub( 2.5) concentration from air flow and PM sub( 2.5) sedimentation of various tree species in different seasons and sampling sites, and that shrub trees possess better PM sub( 2.5) holding capacities than arbor trees in urban and heavy traffic areas, whereas arbor trees exert obvious effects on preventing PM sub( 2.5) pollution in rural areas. This study attempted to solve air pollution through landscape tree arrangement for PM sub( 2.5) sedimentation. The results of this study could serve as a guide for landscape tree species arrangement and plantation in Beijing and other cities.