Abstract:

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.

Key words: park green land, spatial accessibility, Kernel Density Estimation, Dongtai city