关键词: 水资源利用效率;时空演变;非期望产出;超效率SBM模型;Tobit回归;江西省;

Abstract: Improving the water resources utilization efficiency is an effective way to solve the contradiction of regional water use and water pollution,and it is important in promoting the economical and intensive use of water resources. This paper employed super SBM(slacks-based measure) of unexpected output to calculate the utilization efficiency for 11 cities' water resources in Jiangxi Province from 2010 to 2018,and analyzed the temporal and spatial evolution characteristics. Tobit regression model was used to analyze the main factors of water resources utilization efficiency. The results showed that:(1) the overall utilization efficiency of urban water resources in Jiangxi Province was fluctuating and rising. The average value of efficiency increased from 0. 800 in2010 to 0. 813 in 2018．(2) There were obvious differences in the utilization efficiency of water resources among cities. The utilization efficiency of water resources in Nanchang City,Yingtan City and Xinyu City was larger than 1. 000;the utilization efficiency of water resources in Ji'an City,Yichun City and Jingdezhen City was relatively low,the utilization efficiency of water resources in Jingdezhen City was unstable．(3) Environmental constraints,economic development level had positive effects on the improvement of water resources utilization efficiency,water resource endowment,proportion of primary industry increased and urbanization construction were not conducive to the improvement of water resource utilization efficiency. It is suggested to formulate water resources management policies according to the level of economic development of each city in Jiangxi Province,and strictly monitor the discharge of environmental pollutants.

Key words: water resources utilization efficiency; spatio-temporal evolution; unexpected output; super SBM model; Tobit model; Jiangxi Province;