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Groundwater role in the analysis of the water footprint

Groundwater role in the analysis of the water footprint. The role of the groundwater silent revolution: ‘more cash and nature per drop’ IUCN and M. Botin Foundation: Side event 5th World Water Forum, Istanbul, 20 March 2009. Maite M. Aldaya M. Ramón Llamas

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Groundwater role in the analysis of the water footprint

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  1. Groundwater role in the analysis of the water footprint The role of the groundwater silent revolution: ‘more cash and nature per drop’ IUCN and M. Botin Foundation: Side event 5th World Water Forum, Istanbul, 20 March 2009 Maite M. Aldaya M. Ramón Llamas University of Twente – the Netherlands Water Observatory – M. Botin Foundation

  2. Water footprint of a product ►the volume of fresh water used to produce the product, summed over the various steps of the production chain. ►when and where the water was used: a water footprint includes atemporal and spatial dimension. ►type of water use: Green water footprint - volume of rainwater evaporated. Blue water footprint -volumeof surface or groundwater evaporated. Grey water footprint - volume of polluted water.

  3. Water footprint of a nation • ►total amount of water that is used to produce the goods and services consumed by the inhabitants of the nation. • ►two components: • internal water footprint – inside the country. • external water footprint – in other countries.

  4. National water accounting framework Virtual water import for re-export Water use for export Virtual water export = + + + + External water footprint Internal water footprint Water footprint = + = = = Virtual water import Water use within country Virtual water budget + = The traditional statistics on water use Export Consumption Import Production

  5. Guadiana WF Water footprint with distinction of green and blue water (surface and groundwater) and related economic analysis for the Guadiana basin Source: CHG (2008)

  6. 142 905 745 3 10 21 34 74 43 Guadiana WF: Water consumption Agricultural use of water resources in the Guadiana (Mm3/year)(2001) CUENCA TOLEDO CÁCERES 835 1286 93 CIUDAD REAL UPPER GUADIANA BADAJOZ ALBACETE MIDDLE GUADIANA CÓRDOBA HUELVA LOWER GUADIANA PROVINCES GREEN WATER UPPER GUADIANA BLUE SURFACE WATER SEVILLA MIDDLE GUADIANA BLUE GROUNDWATER LOWER GUADIANA FORMER LOWER GUADIANA II OR TOP DOMAIN TOP DOMAIN 0 25 50 100 150 200 Km Source: Aldaya and Llamas (2009)

  7. Guadiana WF: Water consumption Total blue water economic productivity (€/m3) concerning agricultural sector per year Legal restrictions in GW use One of the most regulated basins

  8. Groundwater role within the water footprint ► Cash crops are usually obtained with groundwater irrigation ►Green water and most surface water irrigation systems cannot guarantee supply due to climate variability ► Relevant role of groundwater to achieve ‘more cash and nature per drop’

  9. Thank you

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