基于TOPSIS的东北地区城市脆弱性时空特征分析

Spatial and temporal characteristics of urban vulnerability in Northeast China based on TOPSIS

基于TOPSIS评价法构建指标体系,从生态、经济、社会三个方面研究了东北地区城市脆弱性的时空变化及特征.结果表明:时间序列上2011—2020年东北地区城市脆弱性体现为先上升到后下降,在2014年左右由于受到自然灾害的影响达到峰值;空间演变上脆弱性主要与区位相关性强,相邻城市之间脆弱度会发生裙带关系继而相互影响,高脆弱度城市串联在一起出现“集聚”现象.提出了三点降低东北城市脆弱性的建议,包括建立“绿色城市”“缓冲型城市”“综合性城市”,为城市可持续发展提供一定科学依据.

Based on the TOPSIS evaluation method,an indicator system was constructed to study the spatiotemporal changes and characteristics of urban vulnerability in Northeast China from three aspects:ecology,economy,and society.The study found that in the time series from^(2)011 to 2020,urban vulnerability in Northeast China showed an initial increase and then a decrease,reaching its peak around 2014 due to the impact of natural disasters.In terms of spatial evolution,vulnerability was mainly related to location,and neighboring cities may experience nepotism and then influence each other.High vulnerability cities were connected together to form a“agglomeration”phenomenon.Propose three suggestions to reduce the vulnerability of cities in Northeast China,including establishing“green cities”,“buffer cities”,and“comprehensive cities”,to provide a scientific basis for sustainable urban development.