浙江省粮食贸易中的虚拟水研究

RESEARCH ON VIRTUAL WATER IN ZHEJIANG GRAIN TRADE

贸易中的虚拟水研究使人们认识到地区的水资源危机可以通过全球性的经济贸易来缓解。虚拟水的进出口是水资源的一个来源,通过贸易的形式、利用各种外部资源来缓解内部水资源的紧缺,最终解决水资源短缺和粮食安全问题,是社会实现水资源社会化管理、生态环境安全和社会经济可持续发展的战略保障。以浙江省为研究对象,首先利用各类农作物虚拟水含量标准,核算了1997～2006年10a间浙江省粮食贸易的虚拟水含量。然后比较浙江省全年用水量和用水结构,计算得出粮食贸易产生的年净进口虚拟水量占浙江省年总用水量7.41%左右,占到年农业灌溉用水的17.17%。研究结果表明,过去10a浙江省粮食贸易的虚拟水是浙江省水资源的一个重要的补充。

Researches on virtual water in trade make people know that water crisis in the region could be al-leviated through the global economy and trade.The import and export of virtual water is a source of water resources.Through trade and a variety of external resources,the shortage of water resources and food safety could be finally resolved,which is the base of community to achieve community management of water resources,ecological environmental security and socio-economic sustainable development.The object of study is Zhejiang Province.Firstly,we used various types of crop virtual water standards,and calculated the virtual water content of food trade in Zhejiang Province during 1997～2006.Then,we compared the annual water consumption in Zhejiang and the structure of water consumption.From the calculation,we found that the net import of virtual water generated from grain trade in Zhejiang was about 7.41%of total water consumption and about 17.17%of agricultural irrigation water.The results showed that the virtual water in Zhejiang grain trade was an important water resources supplement over the past decade.