融合多方法的长沙城市活力空间异质性研究

Spatial Heterogeneity of Urban Vitality in Changsha Based on Multiple Methods

应对城市快速扩张所带来的一系列城市问题,提升品质、营造活力已成为现阶段城市规划与建设的重要目标。文章以多源数据为基础,提出融合地理探测器和多尺度地理加权回归模型,多角度地探测城市活力驱动机制及空间关联性,并对比时空差异。研究发现:(1)工作日和休息日,长沙城市活力分布均展现较强的空间集聚性,表现为活力核与城市商圈分布基本一致。(2)识别出不同影响因子的关联强度,其中工作日的城市活力受开发强度和商业设施密度影响最为显著,为关键驱动因素,而休息日受商业设施密度影响最显著。(3)无论工作日还是休息日,商业服务设施密度与开发强度两者交互的影响最为明显。基于以上结论,文章提出了城市活力营造的策略。

In order to cope with a series of urban issues brought about by the rapid expansion of the city,improving quality and creating vitality have become an important goal of urban planning and construction at this stage.Based on muti-source data,this article integrates geographical detector and multi-scale geographically weighted regression model(MGWR)to detect the driving mechanism and spatial correlation of urban vitality from multiple angles,and compares the spatio-temporal differences.The results show that:1)The urban vitality on weekdays and weekends in Changsha shows strong space aggregation,and the distribution of vitality nuclei is basically the same as that of urban business districts.2)The correlation strengths of diff erent infl uencing factors are identified;the urban vitality is most significantly infl uenced by the development intensity and the density of commercial facilities(the key driving factors)on weekdays and by the density of commercial facilities on weekends.3)The interaction between the development intensity and the commercial service facilities density on both weekdays and weekends is the most obvious.Based on the above conclusions,this article proposes the strategy of creating urban vitality.