城市已建成绿道供给水平评估——以南京市主城区为例

Evaluation on the Supply Level of Built Urban Greenways: A Case Study of the Main Urban Area of Nanjing

绿道在改善城市生态环境、提升人居环境品质、增强城市居民福祉和推动城市高质量发展等方面具有重要作用。中国开启绿道建设已逾10年,开展对已建成绿道供给水平的综合评价,将有助于全面掌握绿道供给水平现状,进而为未来绿道优化建设提供科学指导。从生态保护、交通连接和休闲游憩3个层面,采用层次分析法构建绿道供给水平评价体系,以南京市主城区已建成绿道为例,基于实地调查数据和网络大数据,按照“单因子-多因子-总体”的思路测度和评析绿道供给水平的空间分布特征,并依据现存问题,提出了连接生态斑块、构建生活圈绿道循环系统、完善内部服务设施等5项针对性的优化策略。

Greenways play an important role in urban ecological and living environment, the well-being of residents, and highquality urban development. As China has been implementing greenway construction for over 10 years, carrying out a comprehensive evaluation of the supply level of built greenways will help to understand the overall current condition of greenway supply, identify existing problems, and provide scientific guidance for future greenway construction. Taking the built greenways in main urban area of Nanjing as an example, this study proposes an applicable evaluation system from three aspects: ecological protection, transportation connection, and leisure and recreation,using Analytic Hierarchy Process. Based on on-site and online data, the spatial distribution characteristics of greenway supply level are evaluated under the process of "single factor, multi factor and overall". Then based on existing problems, five targeted optimization strategies are proposed, including connecting ecological patches, building a greenway circulation system for life circle, improving internal service facilities, etc..