Study On Equity Of Urban Public Green Space Based On Improved Accessibility Estimation

With the development of the society and economy,urban residents pay more and more attention to the ecological environment.How to plan and manage urban ecological space has become an important topic of urban research.As the core element of urban ecological space,public green resource such as urban parks and green spaces provides entertainment,recreation,exercise and other activities for residents,and has multiple ecological functions such as beautifying the environment,adjusting regional climate,maintaining biodiversity and so on.The spatial distribution of public green resources is related to the well-being of residents,and determines the right of residents to enjoy the ecological service.Whether the public green space is equity to meet the needs of residents,and achieve the maximum efficiency of resource protection will be an urgent problem in the research of urban public green space planning.Therefore,this study focuses on the equity of urban public green space,combs the relevant concepts of space equity in theory,analyzes the logical mechanism of the application of space accessibility to the research of public green space equity,integrates multiple analysis perspectives under different planning objectives in equity research,and constructs the theoretical framework of equity research of urban public green space.On the basis of summarizing the previous studies,the improved accessibility measurement method used the online map data improves the research accuracy,and promotes the fine management of urban public green space.The equity distribution of urban public green space is not only mean to ensure the balance of the resources in spatial distribution,but also to ensure the equity of residents' rights to enter the public green space.The core is the connection between urban residents and public green resources,which is consistent with the concept of accessibility of public facilities.Accessibility indicates how easy it is for residents to overcome space barriers,reach public green space resources and enjoy public green facilities.It can not only reflect the spatial distribution pattern of urban public green resources,but also measure the proximity of residents to public green space resources.Therefore,on the basis of clarifying the logical relationship between equity and accessibility of public green space,this study constructs a measurement method of public green space distribution pattern based on accessibility.In the face of different planning objectives,the study analyzes the relationship between different perspectives of the equity of public green space from the theoretical dimension,establishes the analysis framework of the equity of public green space,analyzes the basic equity of public green resources by matching the supply and demand of resources,and analyzes the equity of resource allocation among different social groups by paying attention to the vulnerable groups.The study takes the main urban area of Shanghai as the study area,uses new data and methods to depict the accessibility distribution map of public green space,and analyzes the resource allocation of public green space under different planning objectives.The study analyzes from the neighborhood scale to meet the requirements of urban fine management.The online map is adopted to improve the accessibility measurement method and improve the accuracy of the accessibility results.Integrating multiple equity analysis perspectives reveals the resource allocation of public green space,which reflects the comprehensiveness of the research.The empirical analysis provides an empirical exploration for the equity study of public green space,shows the great potential of the new data method in the research of public service facilities,and provides analysis basis for the equity study of other public service facilities.