Spatial impact of high-speed railway on"melt city,urban integration,integration"in the Yangtze River Delta from the perspective of accessibility
HSR,as an important channel running through cities and regions,the network and externalities make it present multi-dimensional spatial scale properties,but the existing studies lack a systematic analysis of the multi-dimensional spatial effects of high-speed railway.In view of this,based on the scale attributes of the multi-dimensional space of the high-speed railway,from the 3 scales of the city interior,the city boundary,and the cross-urban area,by modifying the traditional accessibility evaluation model,this article constructs access-ibility evaluation methods under different scale conditions,and systematically measures the comprehensive spatial impact of high-speed railway on urban regional development.Results found that:1)At present,"one city with multiple stations"has become a common mode of spatial organiza tion of high-speed railway stations in cities in the Yangtze River Delta.Suburbs and central urban areas will be more closely connected through high-speed rail,and the development trend of melt city in the era of high-speed railway transit will be more ob-vious.Especially for Zhejiang Province,high-speed railway has become a key link between the inner suburbs of the city and the central city.2)High-speed railway has become a key link and bridge for the reorganization of production and life interactions between adjacent cities.However,from the perspect of the spatial distribu-tion pattern of the accessibility index on the neighboring scale,the development pattern of urban integration has obvious spatial heterogeneity characteristics.At present,7 regions with a high level of urban integration have been initially formed,and basically around the important central and hub cities of the Yangtze River Delta(Shanghai,Nanjing,Hangzhou,Wenzhou,Hefei,Xuzhou,Wuxi).3)High-speed railway has obvious advant-ages in medium-and long-distance transportation,which makes its impact on the development of regional in-tegration even greater.Under the influence of high-speed railway,the integration pattern of the Yangtze River Delta presents a clear and obvious"Z"pattern,and it has clearly extended to Hefei.However,the degree of par-ticipation of surrounding cities in regional integration development is still relatively low.
high-speed railwayaccessibilitymelt cityscale decompositionthe Yangtze River Deltaurban intergrationintergration
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