Evaluation Of Urban Park Green Space In Downtown Area Of Tianjin From The Perspective Of Space Justice

Urban park green space is the embodiment of the government's public service function.Its spatial layout will have an impact on the public's living standard.A reasonable park green space layout can promote social justice.In recent years,the needs of the public have changed from the basic survival to more attention to enjoyment and development,the demand for urban park green space has also increased.China's "people-oriented" ruling philosophy requires attention to the needs of different groups of society.However,the distribution space of existing park green spaces in different streets is obvious,and the layout of facilities is not refined.On this basis,this paper evaluates the urban park green space from the perspective of spatial justice,and puts forward the countermeasures to realize the fairness and justice of urban park green space layout.This paper firstly uses Tuyue word frequency analysis software to find research hotspots in related fields,combined with the characteristics of park green space,from the spatial layout research of urban park green space,the park green space fair research based on accessibility,and the spatial justice of different groups.Conduct a literature review.The results show that the spatial differentiation of park green space in Tianjin downtown area is relatively serious.Although the overall accessibility level of the elderly group is relatively high,the difference between different streets and administrative regions is relatively large.The accessibility level of the core urban area is relatively high and the service scope is wide.There is almost no service blind zone,and the accessibility level is declining from the core urban area to the surrounding area.The overall layout is low in the north,high in the east and low in the east.The overall layout fails to meet the requirements of fairness and justice.The results show that the research on park green space in China is mostly based on macroscopic,and mainly focuses on the fairness of facility layout,lack of attention to the needs of different groups,and space justice as value-oriented research.It can be said that this paper studies from the perspective of spatial justice.Innovative,based on the concepts and theories of space justice and park green space,analyzing the characteristics of different groups and spatial justice requirements,the relatively vulnerable groups of park green space facilities are defined as elderly groups.At the same time,the research object is defined as A city-wide comprehensive park,a regional comprehensive park and a community park that does not include a small garden.Secondly,construct the urban park green space evaluation system based on service area analysis-two-step mobile search model(2SFCA)-location entropy analysis,and carry out empirical analysis on the park green space in downtown Tianjin.The service area analysis can directly reflect the park green space in the setting.Service area within different time thresholds.Based on the analysis of the activities of the elderly population,this paper defines the time threshold of the 2SFCA model as 30 minutes for the evaluation of the park green space accessibility of the elderly population,and introduces the spatial entropy to evaluate the spatial difference of the park green space distribution.The results show that the spatial differentiation of park green space in Tianjin is relatively serious.Although the overall accessibility level of the elderly population is relatively high,the difference between different streets and administrative regions is relatively large.The accessibility level of the core urban area is relatively high and the service scope is wide.There is almost no service blind spot.The level of accessibility decreases from the core urban area to the surrounding area.The overall layout is low in the north,high in the west and low in the east.The overall layout fails to meet the requirements of fairness and justice.Finally,based on the results of empirical evaluation,this paper proposes countermeasures to promote the realization of spatial justice in park green space from the following three aspects: the spatial justice is deeply embedded in the urban park green space layout planning process;the spatial differentiation of park green space is continuously narrowed,and the elderly groups in different streets are guaranteed.Equity,and coordinate the efficiency and fairness of park green space services,and promote the maximization of service benefits;the planning and construction of park green space should focus on multi-group public opinion.