关中平原城市群PM_(2.5)人口暴露风险时空演变特征研究

Spatial-temporal Evolution of PM_(2.5)Population Exposure Risk in Urban Agglomerations in Guanzhong Plain

经济的快速发展导致关中平原城市群环境逐渐恶化,越来越多的人口逐渐暴露于大气高污染地区。研究利用2000年-2020年PM_(2.5)浓度和人口分布数据,采用人口暴露风险模型,分析关中平原城市群PM_(2.5)浓度、人口数量和人口暴露风险的时空演变特征。结果表明:2000年-2020年,关中平原城市群PM_(2.5)浓度总体呈下降趋势,各年份人口逐年增加。时间上,2000年-2020年各年份PM_(2.5)人口暴露风险变化较小,空间上,风险高值区主要集中在西安中部、商洛地区,风险低值区集中在平凉、天水地区。

The rapid economic development has led to the gradual deterioration of the environment in the urban agglomeration of the Guanzhong Plain with more and more people have gradually been exposed to areas with high atmospheric pollution.In this study,the spatiotemporal evolution characteristics of PM_(2.5)concentration,population size and population exposure risk in urban agglomerations in the Guanzhong Plain were analyzed by using PM_(2.5)concentration and population distribution data from 2000-2020 and using the population exposure risk model.The results showed that in 2000-2020,the concentration of PM_(2.5)in urban agglomerations in the Guanzhong Plain showed an overall downward trend,and the population increased year by year in each year.In terms of time,the PM_(2.5)population exposure risk changed less in each year from 2000-2020.The high-risk areas were mainly concentrated in central Xi an and Shangluo areas,and the low-risk areas were concentrated in Pingliang and Tianshui areas.