Subjects: Geosciences >> Geography submitted time 2023-09-19 Cooperative journals: 《干旱区地理》
Abstract： Flexible transportation is conducive to enhancing urban vitality and thus drives the high-quality development of cities. In order to characterize urban vitality in a more practical way, the impact of its influencing factors such as road network morphology, the spatial heterogeneity of these factors, and its mechanisms of changemust be explored to provide a basis for future planning and lay a theoretical foundation for further urban vitalityimprovement. This paper uses the raster calculator in ArcGIS to quantify the city of Baidu’s population heat mapand characterize its urban vitality. Based on road network morphology and geographic big data, sDNA is used tocalculate the topological structure index of the road network, and the GWR model is used to analyze the spatialheterogeneity of the impact of road network morphology and other factors on urban vitality. sDNA emphasizesthe integration and coordination of the urban transportation network. It can better reflect actual traffic locationand has advantages in the analysis of multi-level traffic networks. The GWR model can explore the spatial heterogeneity of the impact of urban vitality influencing factors. The results demonstrate the following. (1) Urban vitality gradually decreases as the road network spreads outward, and the change rule is highly consistent with the network quantity penalized by euclidean distace (NQPDE). (2) Two phase betweenness has little effect on improvingthe urban vitality of Lanzhou City, but it plays a key node and connectivity role in the Lanzhou-Xining urban agglomeration. (3) The NQPDE value of the intersection and edge of the street and the city are high, but the urbanvitality values on both sides of the Yellow River are markedly different due to geographical restrictions. For areaswith relatively low urban vitality, the key to enhancing vitality lies in the establishment of basic service facilitiesand the rational allocation of branches. The rational planning of the bridges connecting the two sides will bringnew changes to the urban vitality of Lanzhou City. In summary, areas with rational network layouts tend to attractmore business and service activities, have greater market potential, and more economic opportunities. The research results can help clarify the influence of road network form on urban vitality, provide a reference for improving urban vitality in the main urban area of Lanzhou City, and help promote and improve urban vitality ingeneral.
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