东营市城镇用地和湿地的分形特征分析

Analysis of Fractal Features of Urban Land and Wetland in Dongying City

基于前人对城镇体系空间结构的分析,选取分形理论中的容量维和信息维测算东营市城镇体系和湿地的空间形态。主要结果如下:1) 东营市城镇用地和湿地都存在分形特征,但湿地的分形特征不如城镇的分形特征明显。2) 城镇用地属于以显性双标度为特征的双分形结构,即自仿射结构;湿地属于以自相似为特征的单分形结构。3) 城镇用地和湿地的空间结构和等级结构存在不协调的现象,但都有向一体化演化的规律。4) 湿地的分形维数是大于城镇用地的分形维数的。总体来说,东营市城镇规模和湿地形态较为均衡,但城镇体系和湿地的功能尚未充分发挥。

Based on predecessors’ analysis of the spatial structure of the urban system, the capacity and information dimensions in the fractal theory were selected to calculate the spatial form of the urban system and wetlands in Dongying. The main results are as follows: 1) Both urban land and wetlands in Dongying have fractal features, but the fractal features of wetlands are not as obvious as those of towns. 2) Urban land is a bifractal structure characterized by a dominant double scale, that is, a self-affine structure;wetlands are a single fractal structure characterized by self-similarity. 3) The spatial structure and hierarchical structure of urban land and wetlands are inconsistent, but there are laws that evolve towards integration. 4) The fractal dimension of wetland is larger than that of urban land. In general, the scale and wetland form of Dongying City are relatively balanced, but the functions of the urban system and wetland have not been fully exerted.