[Objective]To study the accessibility and social equity of urban park green spaces,and provide scientific basis for improving the quality of park green spaces and ensuring environmental justice for vulnerable groups.[Method]The park green spaces in Shangcheng District,Hangzhou City were chosen as the research object.By obtaining multi-source big data such as Mobile Signaling,the Public Comment,point of interest(POI)and so on,a database was constructed.The results of park quality evaluation,attraction algorithm,and Gaussian decay function were introduced to improve the two-step mobile search method,calculate the accessibility value of the elderly population at the residential community level to access park green spaces under the walking and public transportation modes.The Pearson correlation coefficient was used to analyze the differences in social equity and their causes.[Result](1)There were significant differences in the quality of various types of parks in Shangcheng District,with 21.37％of park green spaces scoring higher than the average.(2)There were significant differences in accessibility levels among different transportation modes,with 65.98％of residential areas having extremely low accessibility levels under walking mode,while 33.81％had extremely low accessibility levels under public transportation mode.As the time threshold increased,there was a trend of high value diffusion and low value fading in accessibility.The accessibility of both types of transportation modes showed a clustering distribution,with a higher degree of clustering under public transportation modes.(3)There were social inequality in the park green spaces of Shangcheng District,with the highest level of unfairness in the walking mode,with a low fairness value of 74.8％.Overlay analysis showed that unfair areas were concentrated in the central part of the upper urban area,with a patchy distribution.[Conclusion]There is an imbalance between the supply of park green spaces and the demands of the elderly population.In the future,it is anticipated that during the planning and construction of urban green spaces,the quality of existing park green space services will be improved,transportation networks will be enhanced,the number of park green spaces will be moderately increased,and the living environment of residential communities will be improved.[Ch,7 fig.2 tab.36 ref.]
park green spaceaccessibilitysocial equityelderly populationimproved two-step mobile search methodShangcheng District of Hangzhou City
国家科技期刊平台
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