基于双前沿面SBM-DEA模型的农业用水效率评价

基于有效效率前沿(乐观)和无效效率前沿(悲观)面SBM-DEA模型,对中国31个省(市、自治区)2003—2017年的农业用水效率进行评价,并运用Tobit模型对农业用水效率影响因素进行分析。研究发现:中国农业用水综合效率较低,其中,乐观效率呈现小幅度上升趋势,悲观效率呈现下降-上升-下降-上升趋势。不同农业用水区之间用水效率差异较小,高农业用水区农业用水效率最高,中农业用水区次之,低农业用水区最低。第一产业增加值所占地区生产总值比重、节水灌溉技术、水库总库容量与农业用水效率显著正相关,水资源禀赋、地区教育水平与农业用水效率显著负相关。

Evaluation of agricultural water use efficiency based on SBM-DEA model with double frontiers

Based on the SBM-DEA model with effective efficiency frontier(optimistic)and inefficiency frontier(pessimistic), the agricultural water use efficiency of China''s 31 provinces(municipalities and autonomous regions)from 2003 to 2017 is evaluated, and the Tobit model is used to analyze its influencing factors. The results show that the optimistic efficiency of China''s agricultural water use has a small increase trend, and the pessimistic efficiency exhibits a decrease-increase-decrease-increase trend. The overall efficiency is not high. The difference in water use efficiency between different agricultural water zones is small. The high agricultural water use area has the highest agricultural water use efficiency, the middle agricultural water use area has the middle agricultural water use efficiency, and the low agricultural water use area has the lowest agricultural water use efficiency. The proportion of the value added of the primary industry in the regional GDP, the water-saving irrigation technology and the total storage capacity of reservoirs significantly positively correlate with the agricultural water use efficiency. While the endowment of water resources and regional education level significantly negatively correlate with the agricultural water use efficiency.