中国八大综合经济区水资源利用效率的区域差异及影响因素研究

Regional Differences and Influencing Factors of Water Resources Utilization Efficiency in Eight Comprehensive Economic Zones of China

运用Super-SBM模型测度了中国八大综合经济区2004—2019年水资源利用效率,运用Dagum基尼系数分解法分析了其水资源利用效率的区域差异和差异来源,并基于空间杜宾模型实证分析了影响八大综合经济区水资源利用效率的因素。研究发现:2004—2019年,中国水资源利用效率值呈波动下降趋势,八大综合经济区的水资源利用效率存在显著区域异质性;区域间净差异是八大综合经济区水资源利用效率差异的主要来源,东北、西北经济区的水资源利用效率存在σ收敛;八大综合经济区的水资源利用效率存在显著空间正相关,并呈现出北部沿海和东部沿海经济区"高—高"集聚以及东北、黄河中游、长江中游和西南经济区"低—低"集聚的分布格局;八大综合经济区水资源利用效率的影响因素差异性显著,并弱化了区域绿色可持续发展的空间协同性。因此,应缩小水资源利用效率区域差异,促进水资源利用和水环境治理的协同,因地制宜采取差异化的政策。

In this paper,super SBM model is used to measure the water resources utilization efficiency of eight comprehensive economic zones in China from 2004 to 2019.Gagum Gini coefficient decomposition method is used to analyze the regional differences and sources of differences in water resources utilization efficiency,and the factors affecting water resources utilization efficiency of eight comprehensive economic zones are empirically analyzed based on spatial Durbin model.The results show that:from 2004 to 2019,China’s water resources utilization efficiency shows a fluctuating downward trend;the net difference between regions is the main source of water resources utilization efficiency differences in the eight comprehensive economic zones,and there is a σ convergence in the utilization efficiency of water resources in northeast and northwest economic regions;There is a significant spatial positive correlation between the water use efficiency of the eight comprehensive economic zones,showing a “high-high” agglomeration pattern in the northern and eastern coastal economic zones,and a “low-low” agglomeration pattern in the northeast,middle reaches of the Yellow River,middle reaches of the Yangtze River and southwest economic zones;There are significant differences in influencing factors of water resources utilization efficiency among the eight comprehensive economic zones,which weakens the spatial synergy of regional green sustainable development.Therefore,we should narrow the regional differences of water resources utilization efficiency,promote the coordination of water resources utilization and water environment governance,and adopt differentiated policies according to local conditions.