Sunday, 21 October 2018
Central Europe Programme

Urban Water Footprint: a new approach for water management in urban areas

What is the Water Footprint?

Waterfootprint
The Water Footprint is an indicator of freshwater use that looks not only at direct water use of a consumer or producer, but also at the indirect water use. Water Footprint indicator assess and represent three aspects of water use called blue water, green water, grey water. The blue water refers to consumption of blue water resources (surface and groundwater). “Consumption” refers to loss of water from the available ground-surface water body in a catchment area. Losses occur when water evaporates, returns to another catchment area or the sea or is incorporated into a product. The green water refers to consumption of rainwater insofar as it does not become run-off. Finally, the grey water refers to pollution and is defined as the volume of freshwater that is required to assimilate the load of pollutants given natural background concetrations and existing ambient water quality standards.
(Hoekstra et al., 2011)

Reference: Arjen Y. Hoekstra, Ashok K. Chapagain, Maite M. Aldaya, Masfin M. Mokonnen, The Water Footprint Assessment Manual, 2011.

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