论文部分内容阅读
为揭示城市水资源利用与经济发展水平的耦合性,弥补水足迹单纯考虑经济发展对水资源占用的缺陷,文章采用“水生态足迹”与“脱复钩”理论,从水量(用水量)和水质(污染物排放量)的综合视角,采用Tapio弹性指数评价贵阳市2002—2014年水生态足迹与经济发展的脱钩水平。研究表明:2002—2014年贵阳市水生态足迹与经济发展除2011年扩张性水质型负脱钩外,其余年份为水量型或水质型强(弱)脱钩,且历年脱钩指数时间序列上波动明显,其脱钩平均值为0.138;由于贵阳市GDP增速稳定,故水资源与经济发展的脱钩程度取决于水量和水质生态足迹的变化特征。实现贵阳市水资源与社会经济的可持续发展,不仅要限制工业用水和污水排放量,还要节约生活用水量,减少城市生活污水排放量。另外,相比水足迹,运用水生态足迹的视角评价水资源与经济发展的脱钩态势更具科学性、全面性,有助于丰富水资源与经济发展的脱钩评价角度。
In order to reveal the coupling between urban water resources utilization and economic development level and to make up for the shortcomings of water footprint in economic development, this paper uses the theory of “ecological footprints” and “detached hooks” Water consumption) and water quality (pollutant discharge), the Tapio elasticity index was used to evaluate the decoupling level of water ecological footprint and economic development in Guiyang from 2002 to 2014. The results show that except for the negative decoupling of water quality and water quality in Guiyang from 2002 to 2014, the other years are strong or weak decoupling of water quality or water quality, and the decoupling index over the years shows obvious fluctuations in time series. The average value of decoupling is 0.138. Due to the steady growth of GDP in Guiyang, the degree of decoupling of water resources from economic development depends on the changing characteristics of water footprint and water quality ecological footprint. Realizing the sustainable development of water resources and social economy in Guiyang not only limits the discharge of industrial water and sewage, but also saves the domestic water consumption and reduces the discharge of urban domestic sewage. In addition, compared with the water footprint, it is more scientific and comprehensive to appraise the decoupling of water resources from economic development from the perspective of water ecological footprint, which is helpful to enrich the decoupling evaluation of water resources and economic development.