西部典型矿业城市土地利用效益耦合协调度研究

Coupling Coordination Degree of Urban Land Use Efficiency in Typical Mining Cities in Western China

基于社会、经济及生态层面实现城市土地利用效益的高度耦合协调,对于促进区域经济的可持续发展意义重大。以西部典型矿业地区36个地级市为例,从土地利用经济效益、社会效益、生态效益3个方面对中国西部典型矿业城市土地利用效益的耦合协调度进行分析。在前人研究的基础上,选取2000、2005、2010和2015年作为研究时点,通过构建土地利用效益指标体系,运用改进熵值法对中国西部典型矿业城市土地利用综合效益水平进行测度,弥补传统熵值法易出现极端值和负值的不足,借助耦合协调模型对其耦合协调度进行测算。结果表明,通过对西部典型矿业城市土地利用效益综合指数的测算得知,城市土地利用效益呈阶梯状分布特征且其土地利用效益综合水平呈逐渐上升趋势;耦合度分析可知,2000—2015年处于低水平耦合阶段的城市数是处于拮抗阶段城市数的3倍,西部典型矿业城市土地利用效益耦合程度总体不高,且以低水平耦合为主;协调度分析得知,2000—2015年协调度处于0～0.69之间,以濒临失调、轻度失调、中度失调和严重失调为主;土地利用效益的耦合协调均呈现出明显的由中心至外围空间递减的分布趋势。

To achieve a high coupling coordination degree of urban land use efficiency by considering the social,economic and ecological impacts is of significance for promoting the sustainable development of regional economy. In this study,36 prefecture-level cities from typical mining cities in Western China have been investigated to analyze the coupling coordination degree of land use efficiency in terms of the economic,social and ecological benefits. On the basis of previous studies,the years of 2000,2005,2010,and 2015 were taken as four time points and the index system of land use efficiency was formed. The improved entropy method was used to evaluate the comprehensive benefits of land use in the typical mining cities of Western China,which avoided the disadvantages of traditional entropy method that always produces the extreme and negative values. The coupling coordination degree can be calculated by the coupled coordination model. The results show that the urban land use efficiency is distributed as echelon characterization and the comprehensive level of land use efficiency is gradually increased through the index evaluation of land use efficiency of typical mining cities in Western China.The analysis of coupling degree shows the number of cities in a lower coupling degree is three times of that of cites in a poor stage between 2000 and 2015. Overall,the coupling degree of land use efficiency of typical mining cities in Western China is not high and most of them are low. The analysis of coordination degree shows the coordination degree is between 0-0. 69 from 2000 to 2015,which is mainly dominated as the coupling and coordination degree of land use efficiency shows obvious decrease from the center to the periphery.