基于低碳出行的城市生态绿地空间可达性研究——以武汉市为例

Research on the Accessibility of Urban Ecological Green Spaces Based on Low-Carbon Travel—A Case Study of Wuhan

摘要: 随着我国城市化进程的加快，人们对城市生态绿地的需求日益增强，居民从居住地到达城市生态绿地的可达性如何是值得研究的问题。本文基于低碳出行方式，运用ArcGIS中Network Analyst网络分析的方法，研究武汉市现有地铁路网和规划地铁路网建设完成后居民到达以公园绿地为主的城市生态绿地的时空变化情况。主要得出以下结论：1) 规划的地铁路网建成后，居民点45分钟内可到达的生态绿地入口处数量中值由124个增至185个，可到达的生态绿地入口处数量的最大值由456个增至536个。居民45分钟内可到达的生态绿地数量增加，提高了居民的生态绿地的可选择性和生态绿地的利用效率。2) 规划的地铁路网建成后，45分钟内可以找到最近生态绿地的居民点增加了53个，可达最短时间缩短的最大值为32.91分钟，提高了城市生态绿地的可达性。从研究结果来看，在拟新建地铁网络建成后，武汉市地铁路网更加密集，尤其是中心城区的地铁线路密度增加，填补了许多之前的出行盲区，很好地改善了居民的生态绿地可达性。

Abstract: With the acceleration of urbanization in China, people’s demand for urban ecological green spaces is increasingly growing. The accessibility of residents from their residences to urban ecological green spaces is a worthwhile research topic. Based on low-carbon travel modes, this paper uses the Network Analyst method in ArcGIS to study the spatio-temporal changes in residents’ access to urban ecological green spaces, mainly parks and green spaces, after the completion of the existing and planned subway networks in Wuhan. The main conclusions are as follows: 1) After the completion of the planned subway network, the median number of ecological green space entrances accessible within 45 minutes from residential points increases from 124 to 185, and the maximum number of accessible ecological green space entrances increases from 456 to 536. The increase in the number of ecological green spaces accessible within 45 minutes for residents not only enhances their selectivity of ecological green spaces, but also improves the utilization efficiency of these spaces. 2) After the completion of the planned subway network, the number of residential points where the nearest ecological green space can be reached within 45 minutes increases by 53, and the maximum reduction in the shortest accessible time is 32.91 minutes, improving the accessibility to urban ecological green spaces. The research results indicate that after the completion of the proposed new subway network, the subway network in Wuhan will become dense, especially with an increased density of subway lines in the central urban area. This fills many previous travel blind spots and significantly improves residents’ accessibility to ecological green spaces.