Determination of Agricultural Water Use Levels Using Non-uniform Segmentation Method
Agricultural water use level is an important index to measure the comprehensive agricultural water use effi-ciency.In this paper,31 provinces and autonomous regions in China(excluding Hong Kong,Macao and Taiwan)were taken as examples to calculate the value of agricultural water use efficiency with the help of the super-efficiency SBM mod-el.The principles and evaluation results of equal division method,natural break point grading method and mean-standard deviation method were comprehensively compared.The non-uniform subsection method was proposed to determine the agricultural water use level.The results show that the grade ranges of excellent,good,medium and poor agricultural wa-ter use determined by non-uniform segmentation method were(0.835,+∞),(0.565,0.835],(0.319,0.565]and(0,0.319],respectively.The comprehensive grade of agricultural water use level in China was good.The spatial distribution of water use levels showed the characteristics of"spatial correlation".This method can objectively reflect agricultural wa-ter use level in China and the gap between different provinces,and solves the problem that the determination interval of agricultural water use level changes with water use efficiency.
non-uniform segmentation methodagricultural water use levelagricultural water use efficiencysuper-efficiency SBM model
万方数据
维普
