基于城市流理论的甘肃省中心城市规模等级结构优化研究

运用城市流强度的测定方法,计算甘肃省12座地级城市的外向型功能量、城市流强度和城市流倾向度,依据各城市的城市流强度值将城镇体系规模等级结构划分为3个层次:一级中心城市为兰州,其城市流强度值最高,是省内经济集聚和扩散的中心;二级中心城市为酒泉和庆阳,其城市流强度值较低,是省内次级辐射中心;三级中心城市为平凉、定西、陇南、天水、白银、武威、金昌、张掖和嘉峪关,城市流强度值极低,是地方集聚与辐射的中心。最后,依据各城市的城市流强度结构,提出甘肃省中心城市城市流的强化对策和规模等级结构的优化建议。

Research of the Optimization of Center Cities Hierarchical Structure in Gansu Province Based on the Urban Flows Theory

Using the quantitative analysis method of the urban flow intensity, this paper calculates the extrovert energy, the intensity of urban flow and the degree of tendency of urban flow of the 12 center cities of the urban system in Gansu province. According to the results, the urban system scale grade structure in Gansu province can be divided into three levels： The first level city Lanzhou with high degree urban flow intensity is the center of economic ag- glomeration and diffusion of the province; The secondary centers are Jiuquan and Qingyang, their urban flow intensities are lower, and they are secondary radiation centers of the province; The tertiary centers are Jiayuguan , Jinchang, Baiyin, Tianshui, Wuwei, Zhangye, Pingliang, Dingxi and Longnan, their urban flow intensities are extremely low, and they are the centers of the agglomeration and radiation in those districts. Finally, according to the urban flow intensity structure of each city, this paper puts forward some to optimize the urban system scale grade structure in Gansu province