Discussion about Several Scale Issues of Irrigation Water Use Efficiency
Some basic issues related to scale effect of irrigation water use efficiency were discussed,such as intension of scale effect of irrigation water use efficiency,the reason for scale effect of irrigation water use efficiency,view on the controversy on selecting irrigation water use efficiency,rules of scale division and methods of scaling.The results indicated that scale effect of irrigation water use efficiency,which included spatial and time scale effect,was induced by spatial heterogeneity and reuse of irrigation return water.Simple indicators,such as area and length,should be not used in the definition of scales.The correlation between the traditional irrigation water use efficiency indicators and the indicators of water resource use efficiency should be further studied.The two kinds of indicators should be explored so that they were consistent in the same theory framework.A physical scaling formula,comprehensively considering spatial heterogeneity and reuse of irrigation return water,should be focused in future.
scalescale effectscalingirrigationwater use efficiency
国家科技期刊平台
NSTL
万方数据
维普
