摘要
PM_(2.5)作为我国大气环境的主要污染物之一,对社会经济和公众健康都有较大的危害。绿地通过干沉积、降低环境温度等途径具有降减PM_(2.5)浓度的作用。基于2021年北京中心城区监测站点PM_(2.5)数据和高清影像,借助反距离加权插值、监督分类、景观指数、相关性分析,探究PM_(2.5)和绿地的空间分布规律及两者的内在关联。结果表明:PM_(2.5)年均值呈现北部、西南部低,中部和东部高的空间特征;绿地总体呈现由外环向内环逐渐减少的空间特征;城区绿地空间布局对PM_(2.5)浓度有显著影响,尤其表现在春秋两季;SPLIT、LPI是影响PM_(2.5)最重要的景观指数;PLAND、COHEION、LPI与PM_(2.5)浓度呈显著负相关,而SPLIT与PM_(2.5)浓度呈正相关;LSI与PM_(2.5)浓度无显著相关。研究结果可为绿地空间优化及PM_(2.5)污染防治提供依据。
PM_(2.5),as one of the major pollutants in China’s atmospheric environment,poses a greater risk to both socio-economic and public health.Based on PM_(2.5)data and high-definition images from monitoring stations in central Beijing in 2021,the spatial distribution pattern of PM_(2.5)and green areas and their intrinsic correlation were explored with the help of inverse distance interpolation,supervised classification,landscape index and correlation analysis.The results show that:annual average PM_(2.5)values show a spatial pattern of low values in the north and south-west and high values in the centre and east.The overall spatial characteristics of the green space show a gradual decrease from the outer ring to the inner ring.The spatial layout of urban green spaces has a significant influence on PM_(2.5)concentration,especially in spring and autumn;SPLIT,LPI are the most important landscape indices affecting PM_(2.5);PLAND,COHEION and LPI have a significant negative relationship with PM_(2.5)concentration,while SPLIT has a positive relationship with PM_(2.5)concentration;LSI has no significant correlation with PM_(2.5)concentration.The results of the study can provide a basis for green space optimization and PM_(2.5)pollution prevention and control.
作者
王珏
徐海韵
岳峰
傅凡
WANG Jue;XU Haiyun;YUE Feng;FU Fan(School of Architecture and Urban Planning,Beijing University of Civil Engineering and Architecture,Beijing 100044;School of urban planning and design,Peking University,Shenzhen 518055)
出处
《北京建筑大学学报》
2023年第1期44-52,共9页
Journal of Beijing University of Civil Engineering and Architecture
基金
国家自然科学基金项目(31570699)
中国博士后科学基金面上项目(2021M700205)
北京建筑大学研究生创新项目(PG2020014)。
