北京城市公园绿地应急避险功能布局研究

为推动城市公园绿地应急避险体系建设的发展，在评价指标体系的指导下，应用GIS的空间插值技术，对北京城市人口统计数据进行了空间分布化，并通过人口密度分布与公园绿地缓冲区的叠加分析，对城市公园绿地的人口服务辐射能力进行了探索研究。结果显示，整个北京规划市区内公园绿地的缓冲区覆盖范围总计为42196km^2，约占规划市区面积的38％，存在62646km^2的服务盲区。另外，规划市区东部、北部和西南最外围区域大多数办事处中所含的公园绿地缓冲区占其行政区面积的比例均低于10％。在分析基础上，还进行了公园绿地应急避险功能布局的设想。

The Layout Study on the Emergency and Disaster-prevention Functions of the Green Space of Beijing City Parks

In order to promote the urban park development for emergency and disaster-prevention functions, the urban population spatial distribution is carried out with the guidance of the evaluation index system and the application of the GIS spatial interpol methods, and the population service radiation capability of urban park green space is studied through the superposition analysis of the population density distribution and the park buffer zones. The results show that the total area of park buffer zone in Beijing cily proper is 421.96km^2, 38% of the total urban planning area, while the uncovered service space is 626.46km^2, In addtion, most of the park buffer zones in furthest periphery of the east, north and southwest parts of the planning area are less than 10 percent of their administrative area. Finally the layout of emergency and disaster-prevention functions of park green space are proposed on the basis of the analysis.