Comparative Reserch On Evaluation Of Water Resource Utilization Efficiency In Shanxi Province Based On DEA And SFA Methods

Sustainable utilization of water resources is indispensable to any economic and social development strategy.In order to have a comprehensive understanding of the utilization of water resources in Shanxi Province,this paper combines DEA and SFA methods and Malmquist index method to analyze the utilization efficiency of water resources in industry,agriculture,life and ecology of Shanxi Province from both static and dynamic perspectives,and to analyze the correlation between DEA and SFA.The results show that:1.The overall water use efficiency of Shanxi Province is generally low.The order of the overall water use efficiency is: domestic water use efficiency(0.601)> industrial water use efficiency(0.455)> agricultural water use efficiency(0.454)> ecological water use efficiency(0.247).There is a lot of room to improve the potential of water use;2.The low efficiency of water use in industry,agriculture and ecology in Shanxi Province is mainly caused by the low efficiency of scale,while the efficiency gap between cities is mainly caused by the pure technical efficiency,while the opposite is true in domestic water use;3.The order of total factor productivity change index in Shanxi Province is: total factor productivity change of agricultural water use(1.095)> total factor productivity change of industrial water use(1.08)> total factor productivity change of domestic water use(1.006)> total factor productivity change of ecological water use(0.943).The total factor productivity change index of ecological water use is less than 1,which is a regression state.To some extent,technological progress and innovation play a decisive role in the progress and regression of total factor productivity change;4.The water use efficiency level of Taiyuan city in all aspects is in a better stage,Xinzhou city in all aspects is in a backward stage,while the water use efficiency level of the rest of the region varies in all aspects,which can not be reached a unified conclusion,and should be treated with reference to the calculation results;5.There is a significant correlation between DEA and SFA in estimating the efficiency of water resources utilization,but the efficiency ranking problem involving individual decision-making units is different.The two methods have their own advantages and disadvantages in use,and the emphasis of result analysis is different.If only the dynamic change of the order of decision making units in a certain research area needs to be obtained,only DEA method can be used.If we only need to analyze the overall efficiency of a certain aspect and the static ordering situation of each unit,we can only use SFA.If both of the above two methods and sensitive areas need to be obtained at the same time,it is suggested that the two methods should be used at the same time,which can not only judge the decision-making units which are greatly affected by random,but also take the parts which are accepted by the two methods as conclusions,so as to make the results more convincing and more in line with the objective reality;6.Generally speaking,there is a great space to improve the efficiency of water resources utilization in Shanxi Province.