对虚拟水资源中的蓝水和绿水进行细分，在此基础上评价通过实施虚拟水战略节约的能被农牧业生产之外其他社会经济部门利用的水资源量，是在更宽广范围内进行区域水资源优化配置的重要前提。通过构建蓝水绿水细分模型估算了虚拟水战略中的蓝水资源量和绿水资源量，并以北京市为例开展实证研究。结果表明，北京市主要粮食作物生长消耗的虚拟水中，在考虑土壤水储存和不考虑土壤水储存两种情况下，2007年消耗的蓝水资源量分别为6.21、6.29亿m3，均明显多于同期消耗的绿水资源量；1999年以来基于粮食贸易输入的虚拟水资源量和蓝水资源量迅速增加，其中蓝水输入量最高已达38.80亿m3，而2001—2007年基于口粮贸易的蓝水输入量占相应实体水资源量的比例均高于50％。因此，近年来虚拟水战略在缓解北京市水短缺危机方面已发挥了重要作用，而对虚拟水资源中蓝水和绿水进行细分可为在更宽广范围内进行区域水资源优化配置提供参考。

As an important basis for the rational allocation of regional water resources in wider fields, it is necessary to subdivide virtual water resources into blue water and green water, and evaluate the water resource amounts saved through the virtual water strategy that can be made available for other industries except agriculture and stockbreeding. This paper evaluates the blue water resource and the green water resource in the virtual water strategy in Beijing, according to the subdivision model of blue water and green water. The results show that within the virtual water resources consumed by main crops, in cases of taking into consideration of soil water storage and not taking into consideration of soil water storage, the blue water resources consumed by main grains in Beijing are 6.21×108m3 and 6.29×108m3 in 2007, respectively, both more than the green water resources consumed by main grains at the same time. The virtual water import and the blue water import through grain trade are increased significantly since 1999, and the highest amount of the blue water import is 38.80×108m3, and the proportion of the blue water import through food trade in the corresponding real water resource is higher than 50% in Beijing from 2001 to 2007, which indicates that the virtual water strategy has played an important part in solving the problem of water scarcity in Beijing during the past several years, and the subdivision of the blue water and the green water in the virtual water strategy can provide some helpful insight for the rational allocation of regional water resources in wider fields.