Research On Accessibility Of Urban Park Green Space In Old Town Of Chengdu Based On GIS Network Analysis

With the rapid development of Our country,people's demand for material conditions has been gradually satisfied,and the ecological demand for urban space environment has gradually changed.The status of urban parks and green space in urban residents' daily life has gradually become more and more important.How to rationally plan and lay out urban park green space is an important proposition in urban planning and construction,and whether the distribution of existing urban park green space is reasonable,and whether its accessibility and service efficiency can meet the daily needs of urban residents has also become an important link in the evaluation of urban ecological benefits.Taking the accessibility as the research base point,this paper makes an in-depth study of the existing urban park green space in the old urban area of Chengdu,and discusses which aspects can be used to optimize the layout of green space.This paper conducts a field survey on the urban park green space within the research scope,collects relevant data,collates and verifies the status quo of relevant plots and traffic network,and sorts out the basic data of the follow-up research.Use Arc GIS platform for the study of software,and using the Network Analyst extension module,Network analysis to study within the scope of city park green space,the urban road Network and the different way to travel for detailed modeling calculation,elements related to the different types of urban park green space,the different influence factors such as transportation,weighted superposition calculation,is the real city park green space accessibility diagram and related data and carries on the analysis of relevant accessibility analysis conclusion,the deep research of various kinds of may influence factors of city park green space accessibility.Relevant conclusions are briefly summarized as follows:(1)The 0-10-minute walking service area of urban park green space in the old urban area of Chengdu only covers 45.05% of plots,and the service area of residential area only covers48.07%,with relatively poor walking accessibility.(2)92.22% of the area of the old city of Chengdu can be covered by the 0-5 minutes motorized service area of class A park,which is the preferred way to travel to the comprehensive park in holidays;With bicycle as the travel mode,the cycling service area of0-5 minutes can cover 74.41% of the study area.In general,bicycle is the most suitable transportation tool for short distance in daily life.(3)In addition to the large impact of different travel modes on accessibility,reasonable distribution of green space is also one of the important factors.Reasonable distribution can greatly improve the service efficiency of each green space within the region and the overall service area.(4)The accessibility of urban park green space is also affected by the traffic network.The more complete the urban road system is,the more the accessibility of urban park green space will be improved.Finally,according to the research results,according to the current situation of urban park green space in the old urban area of Chengdu,from the key selection of construction,the overall layout of park green space,travel mode and road optimization and other aspects of the corresponding Suggestions and optimization strategies.:(1)Strengthen the planning and construction of small urban parks and green space(2)Further integrate and plan the overall layout of urban park green space,so that different types of urban park green space can complement each other in function and serve the corresponding target population more efficiently.(3)improve the diversification of way to travel,and the optimization of old city road network,to further optimize the public transportation,increase the permeability of the public transport system,urban road congestion nodes,optimization,in the park entrance traffic persuation and travel guide,as well as for the perfection of slow system and build.