Study on Green Efficiency Measurement and Spatial Differentiation of Industrial Water Resources in Huaihe River Basin
Taking 39 cities in Huaihe River Basin as the research object,the super-efficiency SBM model is used to measure the level of green efficiency of industrial water resources in each city from 2011 to 2021,to explore the distribution characteristics of the space of industrial green water resources use efficiency in the Huaihe River Basin and its evolution,and to analyse the change of the efficiency's spatial transfer using the standard deviation ellipse method.The results indicate that:The overall green efficiency of industrial water resources in the Huaihe River Basin shows an upward trend,but with large fluctuations and significant inter-regional differences,which is manifested as high in the upstream and downstream,and low in the middle reaches.Be-tween provinces,the green efficiency of industrial water resources in the Huaihe River Basin is higher in the Shandong section and relatively lower in the Anhui section.Between cities,the effi-ciency value of Tai'an City is high,the efficiency value of Huainan and Huaibei City is low.The green water resources of industrial water resources in the Huaihe River Basin have a spatial distri-bution pattern of"Northeast—Southwest",with the centre of gravity of efficiency moving towards the southwest,and the trajectory of movement is"Northeast—Southwest—Northwest".
Huaihe River Basinindustrial water resources green efficiencysuper-efficiency SBMstandard deviation ellipseefficiency centre of gravity
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