基于分形理论的黑河流域甘州区城镇体系特征分析

Research on Urban System of Ganzhou County in Heihe River based on Fractal Theory

甘州区是张掖绿洲的核心组成部分,运用分形理论对该区城镇体系规模结构和空间布局分析表明,城市首位度分布明显,城镇体系规模结构较为分散,区内城镇人口分布不均;城镇体系空间布局相对比较集中,主要集中在黑河水系和交通干线上,水源指向型分布和交通指向型分布明显;水资源对城镇体系空间布局的约束作用较大;区内交通网络基础较好,但仍不够健全,通达性也较低。在今后的城镇体系构建中要依据"T"字形布局原则,优先发展基础好的城镇,不断完善交通网络,更重要的是要高效集约利用水资源,保护生态环境。

Ganzhou County is the main portion of Zhanye Oasis in Heihe river basin.Research on structure of population scale and spatial distribution of urban system in Ganzhou County based on fractal theory indicated：①the population scale structure is loose,and the law of the primate town is too big,but the middle towns are absent;②the spatial distribution of urban system is relative concentrative,and towns mainly lied in Heihe river system and traffic lines;③it is obvious that water resources made an restriction impact on spatial distribution of urban system;④the traffic basis is good,but the interaction ability is weak.The construction of urban system in future must abide by principally the ＂T＂ style in spatial distribution,and firstly develop the towns with good basis,continually perfect the traffic network,and what＇s more,reasonably exploit water resources and protect ecological environment.