摘要
揭示在人为和自然协同作用下城市城镇体系分形现象,能够使人们了解城镇规模和空间体系特征,并为城镇体系优化和发展提供依据。本文以邛崃市为研究对象,以复杂系统研究方法和分形理论为依据,以地理信息系统和空间统计学为技术支持,研究邛崃市城镇体系规模特征、城镇体系聚集特征和城镇体系关联特征。结果表明:1研究区Hausdorf维数分别为1.05和1.34,表明各城镇规模无明显差异。结合城市首位率分析结果,说明邛崃市首位城镇的优势明显,但次级中心城镇则没有体现出其应有的优势。2研究区城镇体系空间聚集分维数D=0.71,城镇空间分布以临邛镇为中心向四周密度递减,其结构在理论上属正常分布。3分别计算和比较邛崃市各乡镇城区中心和各乡镇建设用地平均中心的空间关联,发现两种中心类型的空间关联维数分别为1.61和1.89,其值偏大,表明研究区城镇空间联系较弱。因此,在邛崃市城镇体系规划中,需要进一步加强各建设用地斑块间的联系,通过完善交通体系,提高各乡镇城市化率,进而建立更为完善的城镇体系。
Revealing the fractal phenomenon of city system under the action of human and natural coordination can make us understand the urban scale and space system characteristics and provide basis for the optimization of urban system and development. In this study, Qionglal county has been selected as the research object. Using complex system method and fraetal theory as the basis, using geographic information system and spatial statistics for technical support, the characteristics of urban size hierarchy system, urban spatial arrangement and the urban spatial relevance Qionglai county have been studied. Results are as follows：（1）Through the analysis of the urban population and the local finance income, its Hausdorf dimension are respectively 1.05 and 1.34, which shows there are no significant difference between urban size of Qionglai county. According to the law of the primate city, the advantages of the primate city of Qionglai county is obvious,while the secondary center towns do not reflect their proper advantage. （2）The spatial aggregation fractal dimension of Qionglai is 0. 71 ,which shows that the urban distribution density decreases alone the center town to the remote area of Qionglai. The spatial arrangement characteristics are influenced by terrain, economic, social and other factors, and the structure is a normal distribution according to the theory. （3）By calculating and comparing the spatial association of Qionglai city between city center and the construction center, spatial correlation dimension of two central type are revealed, which are 1.61 and 1.89 respectively. The values show that a weak link of the cities of Qionglai County. Especially in western mountainous townships, there are some build lands locating in remote areas,which have weaker relationships to the center towns. Thus, Qionglai need to further strengthen the relationship between the construction land through perfecting the traffic system ,improving the rural city rate, and establishing a more perfect urban system.
出处
《四川建筑科学研究》
北大核心
2015年第4期83-87,共5页
Sichuan Building Science
基金
国家自然科学基金青年科学基金项目(51108284)
关键词
城镇体系
分形
规模体系
空间聚集
空间关联
邛崃市
urban system
fractal
size hierarchy
spatial arrangement
spatial relevance
Qionglai county
