Definition:
Volume d’eau qu’un produit agricole ou industriel «représente», non pas en termes réels, mais en termes virtuels. Autrement dit, volume d’eau nécessaire à la production de ce bien. Si un pays exporte ce bien, il exporte aussi, de façon virtuelle, l’eau correspondante.
Source:
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Food and Agriculture Organization of the United Nations, AQUASTAT Web Site
Hoekstra, A.Y. (editor). 2003. Proceedings of the International Expert Meeting on Virtual Water Trade. Value of Water Research Report Series 12, IHE Delft, Netherlands.