摘要
传统用水效率分析一般采用万元产值用水量(m3/万元),单位面积灌溉用水量(m3/亩)和人均日生活用水量(L/人.日)等指标,指标量纲不统一,无法进行部门间的综合比较。能值(emergy)理论以能值为基准,将生态系统或生态经济系统中不同种类、不可比较的能量转换成统一标准的能值来衡量和分析。本文应用能值这一新的概念和度量标准将传统的三大用水效率分析指标转化成量纲统一的能值指标,便于揭示水资源的真实利用情况,综合分析水资源在各部门行业中的利用效率,为节水和供用水分析提供新思路。
The traditional indexes of water use efficiency analysis are water use per unit production value,irrigation water use per unit area and domestic water daily used by every man.The inconsistency of quantitative units in indexes restricts the comprehensive comparison during different water use departments.Emergy provided the methodology with a common basis for measuring the value of different kinds of energy,and for evaluating the contributions from nature and humanity.Based on the emergy theory,the traditiona...
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2009年第2期62-67,共6页
Journal of Arid Land Resources and Environment
基金
国家"十一五"科技支撑计划项目(2006BAB06B08)
国家自然科学基金项目(50879081)资助
关键词
用水效率
能值分析
节水
水资源
water use efficiency
emergy analysis
water saving
water resource
