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Water balance of global aquifers revealed by groundwater footprint

Abstract

Groundwater is a life-sustaining resource that supplies water to billions of people, plays a central part in irrigated agriculture and influences the health of many ecosystems1,2. Most assessments of global water resources have focused on surface water3,4,5,6, but unsustainable depletion of groundwater has recently been documented on both regional7,8 and global scales9,10,11. It remains unclear how the rate of global groundwater depletion compares to the rate of natural renewal and the supply needed to support ecosystems. Here we define the groundwater footprint (the area required to sustain groundwater use and groundwater-dependent ecosystem services) and show that humans are overexploiting groundwater in many large aquifers that are critical to agriculture, especially in Asia and North America. We estimate that the size of the global groundwater footprint is currently about 3.5 times the actual area of aquifers and that about 1.7 billion people live in areas where groundwater resources and/or groundwater-dependent ecosystems are under threat. That said, 80 per cent of aquifers have a groundwater footprint that is less than their area, meaning that the net global value is driven by a few heavily overexploited aquifers. The groundwater footprint is the first tool suitable for consistently evaluating the use, renewal and ecosystem requirements of groundwater at an aquifer scale. It can be combined with the water footprint and virtual water calculations12,13,14, and be used to assess the potential for increasing agricultural yields with renewable groundwaterref15. The method could be modified to evaluate other resources with renewal rates that are slow and spatially heterogeneous, such as fisheries, forestry or soil.

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Figure 1: Groundwater footprints of aquifers that are important to agriculture are significantly larger than their geographic areas.
Figure 2: Groundwater stress may be affecting 1.7 billion people and could limit the potential to increase agricultural production.

References

  1. Giordano, M. Global groundwater? Issues and solutions. Annu. Rev. Environ. Resour. 34, 153–178 (2009)

    Article  Google Scholar 

  2. Siebert, S. et al. Groundwater use for irrigation — a global inventory. Hydrol. Earth Syst. Sci. 14, 1863–1880 (2010)

    ADS  Article  Google Scholar 

  3. Postel, S. L., Daily, G. C. & Ehrlich, P. R. Human appropriation of renewable fresh water. Science 271, 785–788 (1996)

    CAS  ADS  Article  Google Scholar 

  4. Vorosmarty, C. J., Green, P., Salisbury, J. & Lammers, R. B. Global water resources: vulnerability from climate change and population growth. Science 289, 284–288 (2000)

    CAS  ADS  Article  Google Scholar 

  5. Alcamo, J. et al. Global estimates of water withdrawals and availability under current and future business-as-usual conditions. Hydrol. Sci. J. 48, 339–348 (2002)

    Article  Google Scholar 

  6. Oki, T. & Kanae, S. Global hydrological cycles and world water resources. Science 313, 1068–1072 (2006)

    CAS  ADS  PubMed  Google Scholar 

  7. Rodell, M., Velicogna, I. & Famiglietti, J. S. Satellite-based estimates of groundwater depletion in India. Nature 460, 999–1002 (2009)

    CAS  ADS  Article  Google Scholar 

  8. Famiglietti, J. S. et al. Satellites measure recent rates of groundwater depletion in California's Central Valley. Geophys. Res. Lett.. 38, L03403, http://dx.doi.org/10.1029/2010GL046442 (2011)

    ADS  Article  Google Scholar 

  9. Wada, Y. et al. Global depletion of groundwater resources. Geophys. Res. Lett. . 37, L20402, http://dx.doi.org/10.1029/2010GL044571 (2010)

  10. Wada, Y., van Beek, L. P. H. & Bierkens, M. F. P. Nonsustainable groundwater sustaining irrigation: a global assessment. Wat. Resour. Res. . 48, W00L06, http://dx.doi.org/10.1029/2011WR010562 (2012)

  11. Konikow, L. F. Contribution of global groundwater depletion since 1900 to sea-level rise. Geophys. Res. Lett.. 38, L17401, http://dx.doi.org/10.1029/2011GL048604 (2011)

    ADS  Article  Google Scholar 

  12. Hoekstra, A. Y., Chapagain, A. K., Aldaya, M. M. & Mekonnen, M. M. The Water Footprint Assessment Manual: Setting the Global Standard (Earthscan, 2011)

    Google Scholar 

  13. Hoekstra, A. Y. Human appropriation of natural capital: a comparison of ecological footprint and water footprint analysis. Ecol. Econ. 68, 1963–1974 (2009)

    Article  Google Scholar 

  14. Allan, J. A. Virtual water: a strategic resource, global solutions to regional deficits. Ground Water 36, 545–546 (1998)

    CAS  Article  Google Scholar 

  15. Foley, J. A. et al. Solutions for a cultivated planet. Nature 478, 337–342 (2011)

    CAS  ADS  Article  Google Scholar 

  16. Wackernagel, M. & Rees, W. Our Ecological Footprint (New Society Publishers, 1996)

    Google Scholar 

  17. Hoekstra, A. Y. & Mekonnen, M. M. The water footprint of humanity. Proc. Natl Acad. Sci. USA http://dx.doi.org/10.1073/pnas.1109936109 (published online, 13 February 2012)

  18. Hoekstra, A. Y., Mekonnen, M. M., Chapagain, A. K., Mathews, R. E. & Richter, B. D. Global monthly water scarcity: blue water footprints versus blue water availability. PLoS ONE 7, e32688 (2012)

    CAS  ADS  Article  Google Scholar 

  19. Hoekstra, A. Y., Gerbens-Leenes, W. & van der Meer, T. H. Reply to Pfister and Hellweg: Water footprint accounting, impact assessment, and life-cycle assessment. Proc. Natl Acad. Sci. USA 106, E114 (2009)

    CAS  ADS  Article  Google Scholar 

  20. BGR/UNESCO. Groundwater Resources of the World 1 : 25 000 000 http://www.whymap.org/whymap/EN/Products/products_node_en.html (2008)

  21. Döll, P. Vulnerability to the impact of climate change on renewable groundwater resources: a global-scale assessment. Environ. Res. Lett. 4, 035006 (2009)

    ADS  Article  Google Scholar 

  22. van Beek, L. P. H., Wada, Y. & Bierkens, M. F. P. Global monthly water stress: 1. Water balance and water availability. Wat. Resour. Res. 47, W07517 (2011)

    ADS  Article  Google Scholar 

  23. Smakhtin, V. U. Low flow hydrology: a review. J. Hydrol. 240, 147–186 (2001)

    ADS  Article  Google Scholar 

  24. Smakhtin, V. U., Revenga, C. & Döll, P. A pilot global assessment of environmental water requirements and scarcity. Wat. Int. 29, 307–317 (2004)

    CAS  Article  Google Scholar 

  25. Poff, N. L. et al. The ecological limits of hydrologic alteration (ELOHA): a new framework for developing regional environmental flow standards. Freshwat. Biol. 55, 147–170 (2010)

    Article  Google Scholar 

  26. Wada, Y. et al. Global monthly water stress: 2. Water demand and severity of water stress. Wat. Resour. Res. 47, W07518 (2011)

    ADS  Article  Google Scholar 

  27. Sophocleous, M. Review: groundwater management practices, challenges, and innovations in the High Plains aquifer, USA — lessons and recommended actions. Hydrogeol. J. 18, 559–575 (2010)

    CAS  ADS  Article  Google Scholar 

  28. Foster, S. et al. Quaternary Aquifer of the North China Plain—assessing and achieving groundwater resource sustainability. Hydrogeol. J. 12, 81–93 (2004)

    ADS  Article  Google Scholar 

  29. CIESIN. Gridded Population of the World Version 3 (GPWv3): Population Density Grids (Socioeconomic Data and Applications Center (SEDAC), Columbia University, 2011); available at http://sedac.ciesin.columbia.edu/gpw (accessed, 17 February 2011)

    Google Scholar 

  30. Gleeson, T. et al. Mapping permeability over the surface of the Earth. Geophys. Res. Lett.. 38, L02401, http://dx.doi.org/10.1029/2010GL045565 (2011)

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Acknowledgements

S. Siebert, M. Jellinek, M. Lathuilliere, A. Henderson and W. Rees read or discussed earlier versions of the manuscript, which markedly improved it. T.G. was supported by the Natural Sciences and Engineering Research Council of Canada and a Canadian Institute for Advanced Research junior fellowship. Y.W. was supported by Utrecht University Focus Areas Theme ‘Earth and sustainability’.

Author information

Authors and Affiliations

Authors

Contributions

T.G. developed the groundwater footprint method, created the figures and wrote the paper with input from all authors. Y.W. and L.P.H.v.B. completed the analysis of groundwater consumption and hydrologic data. L.P.H.v.B., T.G. and M.F.P.B developed the environmental flow methodology. All authors discussed results and edited the paper.

Corresponding author

Correspondence to Tom Gleeson.

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Competing interests

The authors declare no competing financial interests.

Supplementary information

Supplementary Information

This file contains Supplementary Text and Data, Supplementary Figures 1-4, Supplementary Tables 1-3 and Supplementary References. (PDF 1079 kb)

Supplementary Data

This file contains a table with the groundwater footprint of all aquifers. The x-y coordinates are the centroids of each aquifer polygon. (XLS 139 kb)

Supplementary Data

This zipped file contains 3 files containing data on groundwater recharge, groundwater abstraction and environmental flow. The file format is arcinfo ascii grid, spatial resolution is half a degree (i.e. 50km by 50km at the equator), temporal resolution is a year, coverage is global and units are in million cubic metres per year. (ZIP 688 kb)

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Gleeson, T., Wada, Y., Bierkens, M. et al. Water balance of global aquifers revealed by groundwater footprint. Nature 488, 197–200 (2012). https://doi.org/10.1038/nature11295

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