基于“生产—治理”两阶段评价的长江经济带工业水资源绿色效率研究

A Study of the Green Efficiency of Industrial Water Resource in Yangtze River Economic Zone Based on the Two-Stage Evaluation of Production and Treatment

长江经济带工业水资源绿色综合效率的提升需要系统性地考虑生产与治理两个阶段的影响。利用网络SBM-Malmquist模型,分别评价了2010—2015年长江经济带工业生产用水效率、废水治理效率及两阶段综合绿色效率。研究结果表明,长江经济带在生产用水阶段的效率高于废水治理阶段的效率,两阶段综合绿色效率增长较好,其增长主要由生产用水阶段的技术进步所主导,在废水治理阶段的管理效率与技术进步水平还需要加强。长江上游及长江下游地区的生产用水效率增长相对较大,但上游地区废水治理效率增长相对不足,长江中游地区的情况则与长江上游地区相反。研究有利于更加系统性地评价与提升长江经济带工业水资源绿色效率。

To improve the green efficiency of industrial water resource in Yangtze River Economic Zone,it is necessary to consider systematically the impact of the two stages of production and sewage treatment.By employing the network SBM-Malmquist method,this paper evaluates respectively the industrial water efficiency,sewage treatment efficiency and the integrated green efficiency of the two stages in Yangtze River Economic Zone from 2010 to 2015.The findings show that the efficiency at production water-using stage in Yangtze River Economic Zone is higher than the efficiency at the sewage treatment stage.The integrated green efficiency at the two stages has better increased due to the technological progress at the production water-using stage,whereas the management efficiency and technological progress level need to be improved at the sewage treatment stage.The growth of production water-using efficiency is comparatively higher in the upstream and downstream areas of the Yangtze River;however,the growth of sewage-treating efficiency is comparatively lower in the upstream area,while that in the midstream area is the opposite.This study can shed some lights on the systematical evaluation and improvement of the green efficiency of industrial water resource in Yangtze River Economic Zone.