缓解城市过热:传统街巷的更新策略——以扬州南河下历史文化街区为例

Mitigating Urban Overheating:Renewal Strategies for Traditional Streets and Alleys:A Case Study of Nanhexia Historic and Cultural Block in Yangzhou

街巷作为历史文化街区主要的外部空间之一,除了最基本的交通功能外,也兼具社区交往、商业活动、娱乐活动及文化展示等功能,是城市物质与精神文化的载体。随着城市热岛效应的加剧,夏季过热的街巷空间直接影响到居民的生活品质和行为方式。通过借鉴前人有关街道热缓解策略的经验,并结合扬州历史文化街区的特点及夏热冬冷的气候特征,从疏导巷道、动态遮阳、增设街角公园、改善界面材质等方面,充分挖掘缓解历史文化街区传统街巷夏季过热的潜力。针对历史文化街区传统街巷热环境的研究不仅是对城市外部空间热环境研究的有益补充,同时对相同气候区的街巷更新也具有现实指导意义。

As one of the main external spaces of historical and cultural blocks,streets and alleys not only serve basic transportation functions,but also serve as carriers of community communication,commercial activities,entertainment activities,and cultural exhibitions,serving as both material and spiritual carriers of urban culture.With the intensification of urban heat island effect,the overheated street space in summer directly affects the quality of life and the behavior of residents.By drawing on the experience and lessons learned from previous studies on street heat mitigation strategies,and combining with the characteristics of Yangzhou's historical and cultural blocks and the hot summer and cold winter climate,this study aims to fully tap into the potential of mitigating summer overheating in traditional streets and alleys in historical districts through strategies such as unblocking alleys,dynamic shading,adding street corner parks,and improving interface materials.The research on the thermal environment of traditional streets and alleys in historical and cultural blocks is not only a beneficial supplement to the study of the external spatial thermal environment of cities,but also has practical guiding significance for the renewal of streets and alleys in the same climate zone.