虚拟水理论体系相关问题探究

在回顾虚拟水研究进展的基础上,分析了虚拟水理论体系构成,总结了虚拟水理论体系一直存在的突出问题。综合考虑虚拟水含量的概念与实际意义,分析了虚拟水构成中取水与耗水并用的矛盾,对虚拟水构成进行还原,提出了虚拟水含量计算的精确与近似表达式;分析了农产品虚拟水量化过程中存在的3个问题,探讨了农产品虚拟水量化的新方法,提出了蔬菜产品虚拟水含量量化的思路;初步提出了林地产品虚拟水含量的方法;对工业产品虚拟水量化方法,提出了实用性与可行性更强的工业产值法;针对加工产品虚拟水含量存在的明显缺陷,给出了改进的分配方法;基于上述虚拟水定额,考虑到虚拟水生产的时空特性,提出实时实地计算虚拟水生产量、消费量、进出口贸易量的方法;同时对虚拟水战略总构成、广义水资源量、虚拟水贸易的可行性等方面进行了探讨。

Exploration on the Theoretical System of Virtual Water

Based on the research progress and composition of the virtual water theoretical system,the outstanding issues were summarized.Considering the concept and practical significance of the virtual water content,the problem of the coexisting of water use and water consumption was analyzed,the composition of virtual water was restored,and the accurate and approximate expressions of virtual water content were proposed.Three issues of virtual water content quantization in agricultural products were discussed,together with an improved method and the ideas of quantitative of the vegetable products' virtual water content were put forward.The virtual water content of the forest products was suggested.And a practical and feasible method on industrial products virtual was advanced.An improved method of virtual water content of the processed products was also brought forward.Taking into account of the temporal and spatial characteristics of virtual water productions,the calculation should be real-time.Apart from this,the general form of generalized water resources in virtual water theory,and the feasibility of virtual water trade were discussed.