基于流域尺度的道路网空间组织特征及依赖性分析——以石羊河流域为例

ROAD NETWORK SPATIAL ORGNANIZATION AND DEPENDENCE BASED ON BASIN SCALE: A CASE STUDY OF SHIYANG RIVER BASIN

以石羊河流域为研究区,在GIS理论方法指导下计算石羊河流域道路网密度,分析了道路网密度与人口密度、GDP密度之间的相关性,在此基础上,分析了石羊河流域道路网密度和道路网空间依赖—偏好指数分布及空间特征。结果表明:石羊河流域的道路网密度以金昌市、武威市为中心向外发散,道路网密度呈带状分布,从南部天祝县城延伸至金昌市金川区。石羊河流域社会经济发展对道路网的依赖性很强,其中超强依赖或超强偏好的乡镇有2个,强依赖或强偏好的乡镇有28个,中等依赖或中等偏好的乡镇有44个,较弱依赖或较弱偏好的乡镇有24个,弱依赖或弱偏好的乡镇只有7个;道路网依赖—偏好指数空间分布差异大,变化明显。

Taking Shiyang River Basin as an study area, the article employs the technical processes and assessment to calculate road network density of Shiyang River Basin base on analysis the social and economic using GIS technology, and then analyze the relationship of the network density with population and GDP. It is found that there exists a stable mathematical relation and a statistics law among them. Considering that the road net building is influenced by the industrial structure of resources, the road building policy, the highway net construction policies and the other transport patterns, so a concept of highway dependence-favoritism index is put forward, which is used to explain the variation between the actually obtained highway net densities and the values obtained by model calculation. The results show that：The density of road network in Shiyang River Basin is outward decay along the center of Jinchang and Wuwei City. Besides, the study also found that the county and central city basically formed a small group of road network in these areas and some key towns may become potential areas, which may develop very fast in road network in the future.This study can afford a fundamental theory for the harmony development of the road network of Shiyang River Basin, population and economy.