虚拟水理论对北京水务政策研究的启示

amang001

资料来源 北京市水利科学研究所、中国科学院生态环境研究中心 摘要 本文从虚拟水定义入手，分析了虚拟水理论的内涵与意义，综述了国际上虚拟水计算方法。在此基础上，分析了北京市水资源变化趋势，在资源性缺水的前提下，降水和入境水减少加剧了用水紧张。应用虚拟水理论，本文计算了北京市的粮食贸易量，并估算出1995-2002年间几种农产品虚拟水输出/入量。结果显示，2000-2002年北京市主要是虚拟水输出，其中以2001年输出44.65亿m3最多，是南水北调入京水量的4倍多。1995-1999年间则是输入虚拟水，以1999年输入33.31亿m3为最高量。因此，减少北京虚拟水对外输出，进行更多的虚拟水输入是解决北京水资源短缺的途径之，并可作为水务管理和政策制定参考。 Abstract Virtual water concept was introduced in this paper, its connotation and significance was analyzed, and accumulation methods were reviewed. Based of those, water resources trends was analyzed in Beijing. Precipitation and alien water decreasing aggravated water stress on the premise of natural scarcity of water resources. Applied virtual water theory, food trade quantity in Beijing was accumulated and virtual water output or input quantities of several agricultural products during 1995-2002 were evaluated. The results showed that virtual water was output during 2000-2002, in which the most water of 4.465 billion cubic meters in 2001 was exported four times as transfer quantity of South-North Water Transfer Project supplying Beijing. During 1995-1999, virtual water was imported, in which the most water of 3.331 billion cubic meters was imported. To reduce virtual water export and more import is one way to resolve water scarcity in Beijing, and was referenced in water management and policy-making. 关键字 虚拟水 水资源 北京 水务政策 粮食贸易Virtual water; Water resources; Beijing; Water policy; Food trade 下载论文

lily

哦，原来这样，哈