乡村振兴视角下秦巴山区农村路网通达性评价与分区优化研究——以陕西省山阳县为例

ASSESSMENT AND ZONE OPTIMIZATION RESEARCH ON RURAL ROAD NETWORK ACCESSIBILITY IN QIN-BA MOUNTAIN AREAS FROM THE PERSPECTIVE OF RURAL REVITALIZATION:A CASE STUDY OF SHANYANG COUNTY IN SHAANXI PROVINCE

交通是经济发展的命脉,路网通达性是衡量交通发展水平的有效评价指标。以位于秦巴山区的陕西省山阳县为例,采用网络分析、空间自相关与地理加权回归等方法,从分项评价、综合评价两方面研究农村路网通达性,并进行通达性分区;提取各区中对经济发展影响较大的分项因子,有针对性地提出了优化策略。结果表明:(1)山阳县路网通达性呈北高南低、由高通达性极核向外围递减的"核心—外围"空间分异特征。(2)通达性水平高的区域地形平坦,区内外交通条件优良,是山阳县的经济、政治及文化中心,对周边村镇有一定辐射带动作用。通达性水平低的区域区位偏远,地形复杂,经济发展滞后。(3)路网通达性水平与社会经济的相关系数在不同分区有空间异质性。最后,提出分区优化建议,以促进经济发展,助力乡村振兴。

Traffic is the lifeblood of economic development,and the road network accessibility is an effective evaluation index to measure the level of traffic development.This paper mainly based on vector data of road network of all levels from Land and Resources Bureau of Shaanxi province,used network analysis,spatial auto-correlation and geographically weighted regression as major methods to assess the level of road network accessibility.Furthermore,we also adopted the sub-item assessing and the comprehensive assessing in order to analyze the level of road network accessibility.Finally,the optimization suggestions were put forward according to the local conditions.The results show that:1)The overall accessibility level of the road network in Shanyang county shows a"coreperiphery"differentiation structure characteristic of high accessibility in the north and low accessibility in the south,and decreasing from the high accessibility in the north to the periphery.2)The high-access zone,mainly in the heartland of the research area,is the economic,political and cultural center of Shanyang county with flat terrain and convenient traffic,which has effect on its surrounding villages and towns to some extent.3)The road network access level has a certain impact on economic growth,and the impact of each sub-item in different zones have spatial heterogeneity.