This indicator reveals the total volume of fresh consumed and polluted water both referred to company activities or to the production of a wine bottle (0,75 l). It is an explicit indicator of the fresh water consumption in the vineyard and in the cellar related to the wine production.

The overall calculation of the water footprint is the sum of three components:

  • Blue Water: refers to the volume of surface or groundwater, directly consumed in the vineyard and in the cellar, that does not return back to the same source where it was taken from or it returns but not at the same time;

  • Green Water: it is the volume of the rainwater, evapotranspired during the grapevine crop cycle;

  • Grey Water: represents the volume of polluted water, quantified as the amount of the required water needed to dilute pollutants so that the water quality remains above defined quality standards (legal and/or ecotoxicology).

The three components of virtual water have a different impact on the hydrological cycle. For example, the green water consumption exerts a less invasive impact on the environmental balances as compared to the blue water consumption. Therefore, the water footprint offers a better and wider perspective on how the viticulture affects the use of water resources.

Reference document: Water Footprint Network.

CONTACT:  Maria Zucchinelli

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