This study quantifies and maps the water footprints of nations from both a production and consumption perspective and estimates international virtual water flows and national and global water savings as a result of trade. The entire estimate includes a breakdown of water footprints, virtual water flows and water savings into their green, blue and grey components.
MEKONNEN, M.M. HOEKSTRA, A.Y. (2011): National Water Footprint Accounts. The Green, Blue and Grey Water Footprint of Production and Consumption. (= Value of Water Research Report Series , 50 ). Delft: United Nations Educational, Scientific and Cultural Organization-Institute for Water Education (UNESCO-IHE) URL [Accessed: 03.09.2013]