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城市公园绿地及周围建成环境对PM2.5的 影响——以武汉市10个公园绿地为例
陈明,杨超,戴菲*
0
摘要:
城市公园绿地具有较大的生态功能,尤其对PM2.5 的消减作用显著,然而当前研究缺乏对公园绿地空间格局及 周围环境的考量。以武汉市10个公园绿地为对象,通过实地 测量PM2.5数据,从绿地的总体特征、绿色空间格局、周围 建成环境3个方面定量分析它们对PM2.5消减的影响。结果表 明:1)公园绿地规模与PM2.5消减量呈显著正相关关系,绿化 覆盖率具有潜在影响;2)公园绿地的绿色空间格局方面,核 心、分支越多的绿地,其PM2.5消减量越少,其中核心的贡献 度更高;3)公园绿地周围建成环境方面,最高建筑指数、建筑 密度、平均建筑高度、建筑体积密度在5个缓冲区中发挥着对 PM2.5消减的相似作用,且对PM2.5的贡献度依次递减,尤其 需注重300m范围内这4项指标的管控。从改善大气颗粒物污 染的角度,为公园绿地自身的空间格局及周围建成环境的优化 调控明确了方向。
关键词:  风景园林  绿地  空间格局  建成环境  PM2.5
DOI:
基金项目:
Effects of Urban Park Green Spaces andSurrounding Built Environments on PM2.5: A CaseStudy of Ten Park Green Spaces in Wuhan
CHEN Ming,YANG Chao,DAI Fei
Abstract:
Urban park green spaces have great ecological function, especially the significant reduction of PM2.5. However, the current research lacks consideration of the spatial pattern of park green space and surrounding environment. Taking 10 park green spaces in Wuhan as examples, through the field measurement of PM2.5 data, this paper quantitatively analyzes their impact on PM2.5 reduction from three aspects: the overall characteristics, the spatial pattern, and the surrounding built environment of green spaces. The results show that: 1) There is a significant positive correlation between the scale of park green space and the reduction of PM2.5, and the green space coverage has a potential impact. 2) In terms of the spatial pattern of park green space, the green space with more cores and branches has less PM2.5 reduction, and the contribution of the core is higher. 3) In terms of the built environment around park green space, the highest building index, building density, average building height and building volume density play a similar role in the reduction of PM2.5 in the five buffer zones, and their contribution to PM2.5 decreases in turn. In particular, attention should be paid to the control of these four indicators within the range of 300m. From the perspective of improving atmospheric particulate pollution, the research has clarified the direction for the spatial pattern of the park green space and the optimal regulation of the surrounding built environment.
Key words:  landscape architecture  green space  spatial pattern  built environment  PM2.5

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