巫山县交通网络分形特征研究

Study on Fractal Properties of Traffic Network in Wushan County

以巫山县为研究区域,基于长度维数、分枝维数和牛鸦维数比,从县域和乡镇两个尺度对巫山县交通网络空间结构特征和通达性分形特征进行了综合分析。研究结果表明:县域尺度上,巫山县交通网络空间分形特征显著,长度维数与分枝维数存在一定差异,分别为1.4209和0.7909,全县交通网络空间结构复杂性有较大提升空间。牛鸦维数比为0.718,交通道路网络通达性整体较好,但离牛鸦比为1的理想值有一定差距;乡镇尺度上,各乡镇牛鸦维数比差异明显,龙溪、大溪等乡镇内部交通网络通达性较差,交通网络连通度有待提高,今后需加强公路交通等基础设施建设,优化交通网络空间结构及通达性水平。

Taking Wushan County as the research area,based on fractal theory of the length dimension,the ramification dimension and the Bovine Crow dimension ratio,the fractal properties of spatial structure characteristics and the accessibility level of the traffic network were synthetically analyzed from the two scales of county and township.The results showed that:on the county scale,traffic network spatial fractal feature in Wushan County was remarkable.And length dimension and ramification dimension existed a certain difference.The complexity of traffic network space structure had a greater space for ascension.The Bovine Crow dimension ratio was 0.718.The accessibility of traffic road network was good,but there was a certain gap from the ideal value;On the township scale,there were obvious differences in the number of Bovine Crow dimension ratio in each town.Accessibility of Longxi,Daxi and other township internal traffic network were poor and the traffic network connectivity needed to be improved.In the future,road traffic infrastructure construction needs to be strengthened.Traffic network space structure and accessibility level should be optimized.