基于熵权-TOPSIS的山区乡镇通达性研究——以重庆市石柱县为例

交通是支撑区域经济社会发展的基础之一,通达性则是反映交通设施水平的有效评价指标。本文以重庆市石柱县为例,选取空间数据和调研数据,引入熵权-TOPSIS模型构建集内外通达性和摩擦阻抗于一体的指标体系,客观分析山区乡镇的通达性,以期为交通合理规划提供参考。结果表明：①通达性指标对区域综合通达性影响程度为：交通设施技术(C₄)>摩擦阻抗(C₅)>等效道路密度(C₂)>乡镇内部连通度(C₁)>与省干道衔接度(C₃)。②贴近度变异系数达0.5410,说明样区交通通达性水平空间差异大。③通达性空间格局表现出以南宾、西沱、悦崃为极核点向外围扩散递减趋势;通达性空间分布表现为西高东低,高通达区主要分布在平缓区,低通达区主要分布在陡峭山区。④通达性良好区域呈“一环一轴”模式分布,呈显著主干道指向性。⑤样区乡镇通达性空间分布格局与经济发展水平和土地流转面积有较高趋同性。研究结果能为区域协调发展、交通合理规划提供良好的理论与实践指导。

Rural transportation accessibility in mountainous areas based on the entropy-weight TOPSIS method: A case study of Shizhu County,Chongqing Municipality

Transportation is one of the foundations to support economic and social development of a region, and accessibility is an important indicator of the level of development of transportation facilities. In this study, we used spatial and survey data to construct an indicator system that considers internal accessibility, external accessibility, and terrain impedance based on the entropy-weight TOPSIS method for Shizhu County, Chongqing Municipality. This study explores mountain transport accessibility condition and can provide some references for mountain transport planning. The results indicate that: (1) The degree of impact of accessibility indicators on regional comprehensive accessibility ranks as: transport facilities technology (C₄) > frictional impedance (C₅) > equivalent road density (C₂) > internal connectivity (C₁) > degree of connectivity with main roads (C₃). (2) The variation coefficient of closeness degree was 0.5410, indicating that the level of transport accessibility of towns in the study area was very different. (3) Accessibility decreased from the three core areas in Nanbin, Xituo, and Yue Lai. The spatial pattern of accessibility is high in the west and low in the east, with high accessibility areas mainly distributed in places of flat terrain, and low accessibility areas mainly distributed in mountainous areas. (4) The area of high accessibility forms a "double axes", which is closely associated with main roads. (5) The spatial distribution of transport accessibility is clearly correlated with economic development level and the total area of land use right transfer. The results can provide some theoretical and practical guidance for the regional coordinated development and transportation planning.