基于GIS的广西生态环境与县域贫困耦合关系研究

Coupling Relationship between Eco-environment and County Poverty in Guangxi Based on GIS

随社会的迅速发展,生态环境问题已经影响到社会经济的各个方面,生态环境与贫困之间的关系逐渐开始被人们重视。根据广西县研究区的特点,分别构建生态环境与县域贫困的指标体系,对研究区生态环境与县域贫困程度进行分析,采纳物理容量概念与耦合计算模型,构建生态环境和县域贫困耦合关联评价体系,借鉴耦合协调度模型,对广西109个县的耦合特征进行空间分异与形成机制分析。研究结果表明:(1)广西的贫困特征由广西南部、东南部及中部向西部、西南部、西北部及东北部逐渐升高。(2)广西的生态环境与县域贫困的耦合协调度Moran’s I指数为0.32,即两者间存在空间正相关性,存在聚集现象,在广西的西北部出现低值聚集,南部、东南部出现高值聚集。(3)广西的生态环境与县域贫困协调发展程度由北部向南部逐渐升高,耦合协调度跨越5个等级,总体上生态环境与县域贫困耦合协调发展程度较低。

With the rapid development of society,the problem of ecological environment has affected all aspects of social economy,and the relationship between ecological environment and poverty has gradually been paid attention to.According to the characteristics of Guangxi county research area,an indicator system for ecological environment and county poverty was constructed to analyze the ecological environment in the study area and the level of poverty in the county.The concept of physical capacity and coupled calculation model were adopted to construct a coupled assessment system for ecological environment and county poverty.Coupling degree of coordination model was used to analyze the spatial differentiation and formation mechanism of coupling characteristics of 109 counties in Guangxi.The results show that:(1)the poverty characteristics of Guangxi gradually increase from south,southeast and central to west,southwest,northwest and northeast.(2)The coupling and coordination degree of ecological environment and county poverty in Guangxi is 0.32,that is to say,there is a positive spatial correlation between them,a phenomenon of aggregation,a low value aggregation in the northwest of Guangxi,and a high value aggregation in the south and southeast of Guangxi.(3)The degree of coordinated development of ecological environment and county poverty in Guangxi gradually increased from north to south,and the degree of coupling and coordination was over five levels,but the degree of coupling and development of ecological environment and county poverty was relatively low on the whole.