西安城市贫困与城市环境质量的时空耦合分析

Analysis of spatio-temporal coupling of urban poverty and the urban environment in Xi′an city

以西安市居民收支状况调查数据及近20年城市环境统计数据为基础,通过ARCGIS空间分析技术和多级模糊综合评价模型,以城市内部的微观区域(街道)为载体,从时间变化和空间差异的角度分析城市贫困与综合环境质量的耦合关系及演化规律.结果表明:西安城市贫困空间大致由放射状嵌套分布转变为圈层分布,城市贫困程度不断减轻;城市远郊的综合环境质量优于中心城区,但整个城区的综合环境质量逐步变差,尤其是南部地区;城市贫困程度与综合环境质量的耦合不断变化,并未呈现某种统一的规律,而是在城市内部表现出更加细化的耦合特征.

Based on the residents′income and expenses data and statistical urban environmental data of Xi′an city nearly 20 years,through ARCGIS spatial analysis technology and the multistage fuzzy comprehensive evaluation model,with urban internal microscopic areas （streets）as the carrier,the spatio-temporal coupling and evolution rule of urban poverty and environment are analyzed.The results show the urban poverty structure changed from radial distribution of nested to layers distribution,the degree of urban poverty reduced continuously;the comprehensive environmental quality in suburb was better than that in the centre,but the integrated environmental quality became worse gradually in the whole city, especially in the southern region; the coupling of urban poverty and comprehensive environmental quality changed and did not present some unified rules,but it showed a more refined coupling characteristic in the inner.