重庆市县域尺度地形起伏度与多维贫困的耦合关系研究

A Study on the Coupling Relationship Between Topographic Relief and Multi-dimensional Poverty in Counties/Districts of Chongqing

选取重庆市有扶贫开发任务的32个区县作为研究区,基于遥感数据和统计数据,采用地理信息技术,构建县域尺度多维贫困指标体系,测算地形起伏度和多维贫困水平,并进一步分析两者间耦合关系.结果表明:①重庆市整体地形起伏度较大,大多数区县处于中等及以上起伏区,地貌环境存在明显劣势.各区县之间的地形起伏度差异明显,东北部略高于东南部,明显高于西部,整体呈东北、东南向西逐渐递减的趋势.②重庆市32个区县的整体多维贫困程度较高,各地区差异较大.多维贫困程度较高的区县集中在东北部和东南部,西部以主城区为中心,多维贫困指数呈放射型向周边扩散升高,但整体仍低于东部.③重庆市多维贫困程度较深的区域受较高地形起伏度的影响较大,32个区县整体地形起伏度和多维贫困耦合度较高,中等及以上耦合度区县占比81.25%,在西部部分地区耦合度变化逐渐明显;耦合协调度最高的区域在东北部边缘和武隆区,并向周边区县均匀扩散降低,在西部边缘区域达到最低.

This paper selects 32 districts/counties with poverty alleviation tasks in Chongqing as the study area.Based on remote sensing data and local government statistical data and adopting the geographical information technology,the authors construct a county multi-dimensional poverty index system with each district and county as the unit,and combining the work with field research,establish a calculation model of surface fluctuation and multi-dimensional poverty degree and further analyze the coupling relationship between the two.The results show that the overall terrain of Chongqing has a large fluctuation,most districts and counties are in the middle or above fluctuation area,which has a considerable disadvantage in the natural geomorphic environment.The topographic relief between the districts and counties is obviously different,the northeast is slightly higher than the southeast and obviously higher than the west,and the overall trend is a gradual decrease from the northeast and southeast to the west.As a whole,the 32 districts and counties in Chongqing have a high degree of multi-dimensional poverty,with great differences among them.The districts and counties with high degree of multi-dimensional poverty are concentrated in the northeast and southeast,and the west is centered on the main urban area.The multi-dimensional poverty index is radiating to the surrounding areas,but it is still lower than the east as a whole.The area with deep degree of multi-dimensional poverty in Chongqing is strongly affected by the high degree of terrain fluctuation.The overall terrain fluctuation and multi-dimensional poverty coupling degree of the 32 districts and counties are relatively high,and the proportion of districts and counties with medium coupling degree or above is 81.25%,and the coupling degree changes gradually in some areas in the west;the coupling coordination degree is the highest in the northeastern edge and Wulong District,and gradually spreads to the surrounding districts and counties,with the lowest in the western fringe.