摘要
利用全国113个环保重点城市2017年的空气质量数据进行了聚类分析,以期对全国城市空气质量分布状况有一个总体性的直观把握。在综合考虑聚类个数和类间区分度的情况下把这113个城市聚为9类,按空气质量达到及好于二级的天数这一指标进行排序并将空气质量最优、中等和最差三类城市在中国地图上进行标注。结果表明:这些环保重点城市空气质量分布状况具有明显的区域性,空气污染严重城市主要集中在华北和西北地区,南方城市的空气质量整体好于北方。最后分析了各类城市空气污染的成因和地域特征并对如何改善城市空气质量提出了治理建议,以供参考。
This paper used the air quality data of 113 key environmental protection cities in 2017 for cluster analysis in order to have an overall and intuitive grasp of the distribution of urban air quality in China.Considering the number of clusters and the differentiation between clusters,the 113 cities were grouped into 9 clusters,and these clusters were ranked by days and this paper marked the best,medium and worst cluster on the map of China.Results show that air quality distribution of these key cities of environmental protection has obvious regional.Cities which belong to the most polluted cluster are mainly in north and north-west China,and air quality of southern cities is better than that of northern cities in general.Finally,the reason for every cluster’s air pollution and their regional characteristics were analyzed.Suggestions on how to improve urban air quality were put forward.
作者
崔筱笛
郭民之
谭毅恒
Cui Xiaodi;Guo Minzhi;Tan Yiheng(School of Mathematics,Yunnan Normal University,Kunming,Yunnan 650500,China)
出处
《绿色科技》
2020年第4期1-4,共4页
Journal of Green Science and Technology
基金
云南师范大学研究生核心课程建设项目(编号:YH2018-C08)。
关键词
城市空气质量
聚类分析
区域特征
治理建议
cities′air quality
cluster analysis
regional features
suggestions for management
