可达性的城市公园服务效率评价——以沧州市主城区为例

为评价城市公园的实际服务效率，将可达性概念引入城市公园规划中。借助GIS平台，采用费用距离法，结合交通道路网络及人口分布数据，对沧州市主城区公园的可达性和服务效率进行分析。结果显示：规划方案的实施能够极大地改善主城区公园可达性及服务效率低下的现状，公园服务辐射区域与人口分布不存在突出矛盾，30分钟内可达的服务区域占76．86％，居住于其中的市民比例达77．21％，但仍存在5．57％的服务盲区；从整体上看，旧城区服务效率高于新规划片区，公园公共服务存在不均衡性，规划方案还可进一步完善；公园的服务面积主要受公园数量及分布、路网密度和道路等级3方面的影响。

Service Efficiency Evaluation of City Parks Based on Accessibility --A Case Study on Main-City of Cangzhou

In order to quantitatively estimate the City parks＇ actual service efficiency, the concept of accessibility is ap- plied to the urban park planning. Based on cost-distance analysis and GIS, the road networks and the population distribu- tion are combined to analyze the accessibility and the service efficiency of parks in Cangzhou City. The results show that the accessibility and service efficiency of parks are significantly improved and enhanced in the planning compared with present situation. 76. 86% area is accessible within 30 rain and the population ratio reaches 77.21% . However, the accessibility of the old town is better than that of the new planning area overall. In additionally, there are still 5.57% of service blind spots, which indicates that public service of parks is still imbalance in region. Therefore, the planning of the town should be improved further. The accessibility is mainly affected by the number and distribution of parks, the road network density and the road ~rade.