生态学报2018，Vol.38Issue(6)：1930-1940,11.DOI:10.5846/stxb201612112547
基于投入产出分析的北京市虚拟水核算
Virtual water analysis for Beijing based on input-output model
摘要
Abstract
Urban water consumption has increased along with growing urbanization and the rapid development of industry and agriculture.Water resources shortage has been a strict constraint for sustainable urban development.Accounting for the water embodied in trade or final demand can provide a new perspective for urban water consumption.In this paper,we proposed an urban virtual water accounting framework to calculate the water use coefficient,virtual water consumption and virtual water trade volume based on input-output (IO) analysis.We used the IO table of Beijing in 2012 and sectoral water consumption to study the sectoral virtual water consumption and virtual water flows among sectors.The results show that Beijing is a net importer of virtual water,importing 6.77× 109 m3,equal to 82％ of the total virtual water in 2012 (8.25× 109 m3).Agriculture (Ag) and manufacturing (Ma) are the main import sectors.The export structure of Beijing needs to be adjusted due to its huge virtual water exports,which accounted for 79.9％ of the final demand,whilst 85.04％ virtual water consumption was used for final demand,and,agricultural products create only 1％ economic benefits with 6.7％ virtual water consumption.These results indicate that Beijing benefits little from the large amount of virtual water exports,and the exports of virtual water-intensified products should be reduced.The main outflow-inflow pairs,including Ag-Ma,Ag-Se and Ma-Co,could be critical pathways for the reduction of indirect urban water consumption.关键词
虚拟水/投入产出分析/水贸易/北京水消耗Key words
virtual water/input-output analysis/water trade/water consumption in Beijing引用本文复制引用
刘雅婷,王赛鸽,陈彬..基于投入产出分析的北京市虚拟水核算[J].生态学报,2018,38(6):1930-1940,11.基金项目
国家自然科学基金项目(71725005,71573021,71628301) （71725005,71573021,71628301）
国家重点研发计划课题(2016YFA0602304) （2016YFA0602304）
