摘要
[目的]研究城市园林绿地对大气中PM_(2.5)的调控效果和作用机理。[方法]选择武汉市4块城市园林绿地为监测点,通过对3块(蛇山绿地、科普公园、青山公园)绿地内外PM_(2.5)瞬时浓度的监测,分析不同时刻、不同季节、不同距离园林绿地消减PM_(2.5)的效果。对2块城市园林绿地(蛇山绿地、湖北大学)进行群落结构调查、PM_(2.5)累积浓度测定及成分解析,分析园林绿地群落结构特征与调控PM_(2.5)之间的关系、绿地内外PM_(2.5)累积浓度特征、武汉城区PM_(2.5)的主要成分。[结果]在白天不同时刻,园林绿地对PM_(2.5)都具有消减作用,除蛇山绿地,科普公园和青山公园在11:00消减调控最强。园林绿地在不同季节对消减PM_(2.5)具有显著效果,蛇山绿地和科普公园秋季优于春夏季,青山公园无季节性差异。在不同距离上,园林绿地在35~45 m对PM_(2.5)调控效果显著。园林绿地面积和群落特征对调控PM_(2.5)有较大的影响,群落面积较大、结构完整、郁闭度高的群落对大气中的PM_(2.5)调控能力较高。蛇山绿地道路PM_(2.5)累积浓度高于绿地内部,湖北大学绿地内外PM_(2.5)累积浓度呈随机性,无规律性。蛇山绿地和湖北大学绿地PM_(2.5)主要成分为有机碳、无机碳、水溶性离子、金属元素,绿地内外各种成分比例差异较小。[结论]园林绿地对大气PM_(2.5)的消减率受到大气PM_(2.5)浓度、季节、时段以及距离PM_(2.5)源的远近等多种因素的影响。
[Objective]To study the control effect and mechanism of urban green space on PM_(2.5) in atmosphere.[Method]We selected four urban green spaces in Wuhan as monitoring points.Through monitoring the instantaneous concentration of PM_(2.5) inside and outside three green spaces(Snake Mountain green space,Kepu Park,Qingshan Park),the effect of reducing PM_(2.5) in different times,seasons and distances was analyzed.The community structure of two urban green spaces(Snake Mountain green space and Hubei University)was investigated,the PM_(2.5)cumulative concentration was measured and the composition was analyzed.The relationship between the community structure characteristics of landscape green space and the regulation of PM_(2.5),the characteristics of PM_(2.5)cumulative concentration inside and outside the green space,and the main components of PM_(2.5)in Wuhan were analyzed.[Result]The results showed that at different times of the day,green space has a reduction effect on PM_(2.5),in addition to Snake Mountain gree space,Kepu Park and Qingshan Park have the strongest reduction control at 11:00.Green space has a significant reduction effect on PM_(2.5)in different seasons,Snake Mountain Green Space and Kepu Park in autumn excelled in spring-summer,and there is no seasonal difference in Qingshan Park.At different distances,garden green space in 35-45 m on PM_(2.5)control effect was significant.The area and community characteristics of green space have great influence on the control of PM_(2.5),and the community with large area,complete structure and high canopy density has higher control ability on PM_(2.5)in the atmosphere.The cumulative concentration of PM_(2.5)outside the green space was higher than that inside the Snake Mountain Green Space,and the cumulative concentration of PM_(2.5)inside and outside the green space of Hubei University was random and irregular.The main components of PM_(2.5)in Snake Mountain Green Space and Hubei University green space were organic carbon,inorganic carbon,water-soluble ions and met
作者
史红文
刘淑超
邓永成
李苗
孙巧峰
SHI Hong-wen;LIU Shu-chao;DENG Yong-cheng(Wuhan Institute of Landscape Architecture,Wuhan,Hubei 430081)
出处
《安徽农业科学》
CAS
2022年第11期101-105,共5页
Journal of Anhui Agricultural Sciences
基金
武汉市园林和林业局科技项目“武汉园林绿地调控空气细颗粒物PM_(2.5)研究”(2015-06)。
