基于多因子层次覆盖模型的城市公共绿地服务功能等级评价——以北京市规划市区内公共绿地为例

以北京市规划市区内公共绿地作为研究区，采用热岛、容纳避难人口数量、绿地率、每年吸收二氧化碳数量、每年释放氧气数量等参数，利用TM影像等地理辅助数据与2005年园林绿化普查资料，在GIS与RS技术支持下，对5个单因子作用下研究区公共绿地服务功能进行评价。并基于多因子层次覆盖评价模型，对复合因子及多因子综合作用下研究区公共绿地服务功能进行评价。结果表明：五个因子综合作用的结果是：在北京规划市区内的没有服务功能很差的公共绿地，服务功能差的公共绿地面积占到23.6%，服务功能中级的占45.1%，服务功能好的占29.1%，服务功能很好的占2.1%。

Function of public green space assessment based on the multi-factor hierarchical cover model: a case study in urban planning extension, Beijing city

This study aimed at the evaluation of the service function of public green space under single or compound factors at regional scale using a Geographic Information System (GIS) and remote sensing, urban planning extension, Beijing city as our study area. Urban heat island, accommodate asylum population, green rate, absorption of carbon dioxide per year, and release of oxygen per year were collected, processed, and constructed into a spatial database using GIS and remote sensing data. Grade of sevice function of public green space and the contrabutions to service function of singal factor and compound-factor were analysed and mapped using multi-factor hierarchical cover model. The results showed: Nearly zero of the public green space might have severe poor service function. Slight poor service function accounte for 23.6%. Intermediate service function accounted for 45.1%. Public green space, with good or better service function, respectively accounted for 29.1% and 2.1%.