环长株潭次级城市群生态足迹变化与经济脱钩研究

Study on Ecological Footprint Change and Economic Decoupling in Secondary Urban Agglomeration of Changsha-Zhuzhou-Xiangtan

生态保护和经济发展是辩证统一关系,自然资源开发强度过大会限制城市群经济的可持续发展。为明晰环长株潭次级城市群的自然资源开发强度和经济之间的关系,采用三维生态足迹模型、Tapio弹性脱钩模型和ArcGIS空间分析法对2009—2018年环长株潭次级城市群的生态足迹时空特征、脱钩状态进行定量定性研究。结果表明:2009—2018年间,研究区人均生态足迹量整体经历了“上升-下降”趋势,人均生态足迹深度远远超出生态足迹广度,各城市足迹深度、广度空间分异显著,以消耗自然资本存量来促进经济发展是主要的发展模式;耕地和化石能源用地是主要的足迹来源,娄底市是人均生态足迹最高的城市;城市群人均生态足迹与经济脱钩关系主要为强脱钩和弱脱钩,各城市之间脱钩状态差异较大,城市群处于环境压力缓慢增长的状态。研究结果可为环长株潭次级城市群进行“生态足迹—经济发展”宏观调控提供有益参考。

Ecological protection and economic development are dialectical and unified relations,and the intensity of natural resources development limits the sustainable development of urban agglomeration economy.To clarify the relationship between natural resource development intensity and economy of Changsha-Zhuzhou-Xiangtan secondary urban agglomeration,the spatial and temporal characteristics and decoupling state of ecological footprint of Changsha-Zhuzhou-Xiangtan secondary urban agglomeration from 2009 to 2018 were quantitatively and qualitatively studied by using three-dimensional ecological footprint model,Tapio elastic decoupling model and ArcGIS spatial analysis method.The results show that from 2009 to 2018,the ecological footprint per capita in the study area was experienced an overall"up-down"trend;the ecological footprint per capita was far more than the ecological footprint breadth;the urban footprint depth,breadth and space differences were significant;consuming natural capital stock to promote economic development was the main development model;cultivated land and fossil energy land was the main footprint source.Loudi city was the highest per capita ecological footprint of the city;the relationship between the per capita ecological footprint and economic decoupling was mainly strong decoupling and weak decoupling.The decoupling state between cities was different;urban agglomeration was in the state of slow growth of environmental pressure.The results can provide a useful reference for macro-control of"ecological footprint-economic development"in the secondary urban agglomeration of Changsha-Zhuzhou-Xiangtan.