基于在线地图路径循迹的山地城市绿色开放空间步行可达性衰减  

Research on the Walking Accessibility Attenuation of Green Open Space in Mountainous Cities Based on Web Map Path Tracking

作　　者：罗丹[1] 张沂珊 洪竞科 LUO Dan;ZHANG Yishan;HONG Jingke(Faculty of Architecture and Urban Planning,Chongqing University;Architecture and Urban Planning,Chongqing University;the School of Management Science and Real Estate,Chongqing University)

机构地区：[1]重庆大学建筑城规学院风景园林系 [2]重庆大学建筑城规学院 [3]重庆大学管理科学与房地产学院

出　　处：《风景园林》2024年第7期100-107,共8页Landscape Architecture

基　　金：国家自然科学基金重点项目“宜居城乡景观生态规划理论与方法——以西南山地为例”(编号52238003);国家自然科学基金“景观触媒效应下的山地城市开放空间体系构建机制研究”(编号51978093)。

摘　　要：【目的】精准客观地评估山地城市绿色开放空间的步行可达性,揭示实际可达性与理论可达性之间的衰减状态,为山地绿色开放空间服务能力优化提升提供依据与参考。【方法】以重庆市渝中区为研究范围,依托ArcGIS平台和高德地图应用程序接口(application programming interface,API),引入路径循迹法,从实际步行路径出发量化可达性,并通过对比实际可达性与理论可达性来分析城市整体及绿色开放空间的可达性衰减状态。【结果】1)渝中区绿色开放空间步行可达范围整体衰减面积比为43.19%,且5 min、10 min、15 min阈值内可达范围的衰减面积比分别为32.12%、46.49%、46.30%;2)绿色开放空间衰减程度不均衡,衰减程度大于60%的绿色开放空间有16个,衰减程度最高为87.71%;3)山顶、各级台层和滨江楔形绿色开放空间的高衰减比例相对更高。【结论】进一步从选址、环境和本体3个方面总结衰减原因,并从步行可达性视角提出增量、串联、渗透的山地城市绿色开放空间优化建议,为客观评估山地城市绿色开放空间步行可达性提供思路,对山地城市绿色开放空间服务效能提升具有重要的现实意义。[Objective]Green open space serves as a main carrier for daily leisure and entertainment of urban residents,and is closely related to the construction of urban livable environment and the improvement of residents'quality of life.However,in mountain cities with unique urban texture and spatial pattern due to the restriction of such factors as landform and construction conditions,the walking system is closely integrated with the undulating terrain,posing many challenges to the planning and construction of green open space.For mountain cities,the walking accessibility is relatively limited,the actual walking accessibility of green open space is inferior to the theoretical accessibility,and the traditional methods for accessibility measurement may not take effect,resulting in the lack of green open space in the real life of residents.In view of this,it is necessary to improve the accuracy of quantitative evaluation of accessibility in mountain cities.In fact,accurately and objectively measuring the walking accessibility of urban green open space and revealing the difference between actual accessibility and theoretical accessibility are the key to optimizing and improving the service capability of green open space in mountainous areas.[Methods]Taking Yuzhong District in Chongqing as an example,this research,based on ArcGIS platform and Amap application programming interface(API),develops a new quantitative accessibility evaluation method termed“path tracking method”with reference to the path buffer method proposed by previous scholars.Then the research compares the evaluation results of the path tracking method and the network analysis method to differentially identify the areas with accessibility attenuation,which helps more clearly and accurately reflect the spatial problems under the influence of mountain conditions.After that,the research discusses the gap between the theoretical and practical use of green open space.Specifically,the path tracking method uses python-based self-programmed code to obtain the wal

关 键 词：风景园林 绿色开放空间 步行可达性衰减 路径循迹 山地城市 重庆渝中区 

分 类 号：TU986[建筑科学—城市规划与设计]