基于耦合协调模型的长江经济带经济与土地生态质量关系研究

Study on the relationship between economy and land ecological quality in the Yangtze River Economic Belt based on coupling coordination model

融合熵权法和层次分析法的优势,在构建长江经济带“经济-土地生态质量”指标体系的基础上,研究2012年、2015年、2018年3个时点上长江经济带115个地级单位的经济和土地生态的时空动态特征,并运用耦合协调模型分析两者的耦合关系.结果显示:1)长江经济带经济发展指数呈现“东高西低、中心外围”的分布特征,且呈现前期新一线城市的发展速度较快,带动后期连片式发展为主的特征;2)土地生态质量的空间格局整体上呈现中、西部地区优于东部地区以及大范围面状分布的特征;3)因耦合协调格局与经济发展格局存在内部一致性,故长江经济带耦合协调状况呈现“东高西低、中心外围”的空间分布规律,长三角地区是整个经济带两系统互动效用的最优地区,而耦合协调低值区域的分布比较分散,主要集中在西部地区的云南省西南部、四川盆地、中部地区的湖南省湘西地区.

In this paper,we combined the entropy weight method and the advantage of analytic hierarchy process(AHP),the build of the Yangtze river economic belt“economy-land ecological quality index system on the basis of exploring the 115 regional units in 2012,2015,2018 in the Yangtze River Economic Belt economy and land ecological space-time dynamic characteristics,and used coupling coordination model to analyze the coupling relationship.The results were shown as following.1)The economic development index of the Yangtze River Economic Belt presented the distribution characteristics of“high in the East and low in the west,central periphery”,and presented the characteristics of rapid development of new first tier cities in the early stage and driving the continuous development in the later stage,2)On the whole,the spatial pattern of land ecological quality in the central and western regions was better than that in the eastern regions.3)Because of the internal consistency between the coupling coordination pattern and the economic development pattern,the coupling coordination pattern of the Yangtze River Economic Belt presented a spatial distribution pattern of“high in the east and low in the west,and the periphery of the center”.The Yangtze River Delta region is the optimal region for the interaction utility of the two systems in the whole economic belt,while the distribution of the regions with low coupling coordination value is relatively dispersed.They are mainly concentrated in the southwest of Yunnan Province and the Sichuan Basin in the west,and in the west of Hunan Province in the central region.