基于镇域尺度的环鄱阳湖城市群雾霾污染演变特征分析

Analysis on the Characteristics of Haze Pollution Evolution in the Urban Agglomeration Around Poyang Lake Based on the Township Scale

从镇域尺度厘清雾霾污染的时空格局特征,对加强环鄱阳湖城市群生态文明建设具有重要的作用。基于PM 2.5浓度分布数据,通过数理统计与探索性空间分析方法对环鄱阳湖城市群镇域雾霾污染时空格局特征进行了深入分析。结果显示:(1)环鄱阳湖城市群镇域雾霾污染的绝对差异波动变化显著,而相对差异虽有波动但整体趋于平稳,城市群雾霾污染具有明显的热点集聚特征。(2)研究期内,环鄱阳湖城市群镇域雾霾污染大致经历了中度污染均衡、高污染集聚、低度污染均衡3个阶段,中高度及高度污染型镇域具有显著的空间集聚与空间“跃迁”现象。(3)雾霾污染的空间关联格局则出现高-高型镇域由“一”字型向南北式纺锤状格局转变,低-低型镇域由紊乱态逐步向有序态演进特征。因此,今后应逐步调整产业结构,促进城市群社会经济绿色生态发展,实现雾霾污染源的下降;同时,加强城市群山水林田草综合治理,打造环鄱阳湖城市群生态命运共同体,以生态手段促进雾霾污染的有效降解。

Clarifying the characteristics of the temporal and spatial patterns of haze pollution from the township scale has an important cognitive effect on the construction of ecological civilization in the urban agglomeration around Poyang Lake.Based on the PM2.5 concentration distribution data,through mathematical statistics and exploratory spatial analysis methods,an in-depth analysis of the characteristics of the temporal and spatial pattern of haze pollution in the urban agglomeration around Poyang Lake,the results show:(1)Haze pollution in the urban agglomeration around Poyang Lake The absolute difference fluctuates significantly,while the relative difference fluctuates but the overall difference tends to be stable.The smog pollution of urban agglomerations has obvious hotspot clustering characteristics.(2)During the study period,the haze pollution in the towns of the Poyang Lake urban agglomeration roughly experienced three stages:moderate pollution balance,high pollution agglomeration,and low pollution balance.The middle and high pollution towns have significant spatial agglomeration and The phenomenon of spatial“transition”.(3)The spatial correlation pattern of haze pollution shows that the high-high type township has changed from a“one”to the north-south spindle pattern,and the low-low type township has gradually evolved from a disordered state to an orderly state.Based on this,this article believes that the industrial structure should be gradually adjusted,the social,economic,and green ecological development of urban agglomerations should be gradually adjusted to reduce haze pollution sources.Means to promote the effective degradation of haze pollution.