城市公园绿地是衡量城市建设水平的重要指标之一。以江苏省东台市市区公园绿地为研究对象,采用核密度估计模型,结合两步移动搜索法和缓冲区分析法,依据人口与公园绿地的空间匹配程度进行可达性分析。结果表明:1)区域内人口与公园绿地分布不平衡:59.61%的人口集中在市区西南部,56.36%的公园绿地分布在城东地区。2)公园绿地可达性空间分布差异显著,整体上呈现西南部较低、东部较高的特征。西南部与中部主城区可达性等级偏低,可达性指数为0.25~1;城东地区等级高,可达性指数在1.33~5之间;北部开发区绿地可达性适中,可达性指数为1。

Urban park green space is one of the important indicators to measure the level of urban construction.This paper took the park green land in Dongtai urban district as the research object,adopting Kernel Density Estimation model and combining Two Step Floating Catchment Area method (2SFCA) and Buffer Analysis to study the spatial accessibility through the spatial matching degree of population and park green land.The results showed that:(1) the distribution of population and park green land in the region was unbalanced:59.61% of the population concentrated in the southwest of the urban area,and 56.36% of the park green land was distributed in the east of the city.(2) there was a remarkable spatial difference of spatial accessibility of park green land,which generally showed the characteristics of lower in the southwest and higher in the east.The accessibility grades of southwest and central urban areas were relatively low,with an index of 0.25~1.In the east of the city,the grade was high,and the accessibility index was distributed between 1.33 and 5.The accessibility of park green land in the northern development zone was moderate,and its index was 1.