分形视角下黄土高原沟壑区城乡空间发展适宜路径研究——以陕北米脂为例

The development path of urban and rural space in the loess plateau from the perspective of fractal theory:A case study of Mizhi

以陕北米脂沟壑区为研究案例,依据城镇空间形态结构的演变规律,结合陕北黄土高原丘陵沟壑区独特的沟壑空间体系,探讨该地区城乡空间动态发展的不同路径.在以人居空间高效分布与自然环境保护综合效益最大化为目标的分形理论指导下,通过比较不同城乡空间发展路径的总体差异及各自的阶段性特征,包括城乡规模、空间形态、分形维数等指标的变化趋势,总结米脂城乡总体用地形态扩展的适宜途径,引导人居环境朝着更为合理、优化的方向发展.研究结论有效地指导了米脂城镇化进程中的城乡协同建设与生态保护,提升了土地资源的综合效益,有助于改善粗放利用空间的传统模式.

This paper takes Mizhi area as an example and discusses the different development paths of urban and rural space in gully region of loess plateau,based on the laws of urban and rural spatial evolution and the special status of local natural environment.Under the guidance of fractal theory which aims to maximize comprehensive benefit of human settlement and natural environment,the paper analyses the differences of the development paths and their stage characteristics,including the variation of the urban dimensions,forms and fractal index.In addition,it puts forward the suitable development path of urban and rural space which directs the human settlement along a more reasonable line.Finally,this research helps Mizhi area on the urban-rural integration and ecological protection,and promotes overall benefits of land resource by improving traditional mode of land extensive use.