基于“分形网络”的黄土高原沟壑区城镇路网适宜模式研究

Study on the suitable model of urban road system in the loess plateau from the perspective of fractal path

以榆林高新区现代城镇道路系统和米脂古城传统街巷系统作为研究案例,借助分形理论中的关联维数测度方法,对两套城镇路网系统进行分形绩效评价和比较,并通过路径构成的等级性、连接的复杂性、组织逻辑等要素的比较分析,揭示现代城镇路网与传统城镇街巷的分形差异,总结影响其分形特征的因素和空间内涵,由此提出既延续传统路径分形基因、又满足现代交通需求的黄土高原地区道路网的适宜模式与建设策略.

Road system as an important part of city is the frame of urban space and is directly related to the development of the urban structure. This paper takes the modern road system of Yulin new area and the traditional road system of Mizhi as examples, and calculates the correlation dimensions of the two road systems and reveals their differences on aspect of the fractal characteristics. In addition, it sums up several factors which influence the fractal characteristics of road system, such as hierarchy, complexity, logic and so on. Finally, the paper puts forward the suitable model of urban road system in the loess plateau which absorbs the fractal gene of traditional road system and satisfies the needs of modern traffic.