连片特困地区可达性与贫困程度的空间耦合模型

为获取连片特困地区综合交通可达性与贫困程度的空间耦合特征,基于空间截面数据,构建了因子分析—熵权多维贫困测度模型、综合交通可达性评估模型和空间耦合协调模型,并以滇西边境山区为例进行分析验证.结果表明:整体空间上,贫困程度表现出由中心向外围扩散的模式,呈现南部高于北部、边缘高于中心的空间特征;综合交通可达性空间分异显著,可达性值呈"偏左正态分布",并在主要节点形成了"Y字型"综合交通可达性优势带;贫困程度与综合交通可达性的耦合协调水平两极化特征明显,中心区域及边缘地带上的空间耦合关系显著,协调发展水平较高;其他县域耦合协调发展水平偏低,交通基础设施的扶贫效应有待发挥.

Spatial Coupling Model between Accessibility and Poverty Intensity in Poverty Contiguous Destitute Areas

In order to obtain the characteristics of spatial coupling between poverty intensity and integrated transport accessibility, based on spatial cross- sectional data, models are constructed to measure the multidimension poverty intensity based on factor analysis and entropy- weight, calculate the integrated transport accessibility, and evaluate the spatial coupling coordination degree. Finally, this paper takes the mountains border regions of western Yunnan as a case analyzed and verified. The results show that poverty intensity indicates from center to periphery diffusion model, in the overall space, presenting the special feature of the south higher than the north, the margin zone higher than the center area. Spatial differentiation of integrated transport accessibility is remarkable, and accessibility value is almost in "normal distribution" deflecting to left, forming the "Y- type" integrated traffic accessibility advantages in the main transport nodes. The polarization characteristic of level of coupling coordination is obvious between poverty intensity and integrated transport accessibility. The degree of spatial matching and the level of coupling coordination are higher in central area and marginal area. The coupling coordination level is generally low, and the degree of dispersion is relatively large in other country areas where the poverty alleviation effect of transportation infrastructure needs further elaboration.