Abstract
Increasing freshwater demands have made allocation of water in water-scarce regions especially severe in arid areas. To assist in allocating water, a virtual water assessment methodology is described to assess strategies of saving water by identifying products which would be better as imports rather than producing them. Virtual water quantities, including green and blue water for five major crops, are analyzed, utilizing the methodology, for the three regions of East, Mid and West in Gansu Province, Northwest China, over a nine-year period from 2002 to 2010. Unit virtual water value as well as crop water use efficiencies are included, to determine if current cropping patterns are reasonable. Overall, the methodology encourages crops with lower water consumption, higher unit virtual water value, and crop water use efficiency. Estimates of potential virtual water flows reflect either the amount of virtual water which needs to be imported or the amount which can be exported. The results show that for different regions of Gansu, wheat and soy should be reduced in all three regions; cotton and corn can be increased in the West and Mid regions, respectively; potatoes can be a largely encouraged product throughout Gansu Province. Current cropping patterns in the three regions in the Province are therefore shown to be not optimal; changes in cropping patterns can be initiated, and water deficits can be balanced by virtual water transfers amongst the three regions as indicated by potential virtual water flows.
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References
Aldaya MM, Allan JA, Hoekstra AY (2010) Strategic importance of green water in international crop trade. Ecol Econ 69(4):887–894
Aldaya MM, Chapagain AK, Hoekstra AY, Mekonnen MM (2012) The water footprint assessment manual: setting the global standard. Routledge
Allan JA (1998) Virtual Water: a strategic resource global solutions to regional deficits. Groundwater 36(4):545–546
Chapagain AK, Hoekstra AY (2007) The water footprint of coffee and tea consumption in the Netherlands. Ecol Econ 64(1):109–118
Chapagain AK, Hoekstra AY (2008) The global component of freshwater demand and supply: an assessment of virtual water flows between nations as a result of trade in agricultural and industrial products. Water Int 33(1):19–32
ChinaDataOnline (2013) http://chinadataonline.org/
Crescimanno G, Marcum KB (2009) Irrigation, salinization and desertification. In: Evolution of cropping systems as affected by climate change. Aracne Ed., Roma
Eisenhauer DE (2011) Irrigation efficiency and uniformity, and crop water use efficiency
Elena G, Esther DC (2010) From water to energy: the virtual water content and water footprint of biofuel consumption in spain. Energy Policy 38(3):1345–1352
FAO (2013) http://www.fao.org/nr/water/inforesdatabasescropwat.html
Hoekstra AY, Chapagain AK (2007a) The water footprints of Morocco and the Netherlands: global water use as a result of domestic consumption of agricultural commodities. Ecol Econ 64(1):143–151
Hoekstra AY, Chapagain AK (2007b) Water footprints of nations: water use by people as a function of their consumption pattern. Water Resour Manag 21(1):35–48
Islam MS, Oki T, Kanae S, Hanasaki N, Agata Y, Yoshimura K (2007) A grid-based assessment of global water scarcity including virtual water trading. In: Integrated assessment of water resources and global change. Springer, pp 19–33
Liu S (2013) Virtual water and the optimization of industrial structure of agriculture in Shandong Province
Long A, Xu Z, Zhang Z (2003) Estimate and analysis of water footprint in Northwest China, 2000. J Glaciol Geocryol 25(6):692–700
Mo X, Liu S, Lin Z, Guo R (2009) Regional crop yield, water consumption and water use efficiency and their responses to climate change in the North China plain. Agric Ecosyst Environ 134(1):67–78
Norra S, Berner Z, Agarwala P, Wagner F, Chandrasekharam D, Stüben D (2005) Impact of irrigation with as rich groundwater on soil and crops: a geochemical case study in West Bengal Delta Plain, India. Appl Geochem 20(10):1890–1906
Ridoutt B, Juliano P, Sanguansri P, Sellahewa J (2010) The water footprint of food waste: case study of fresh mango in Australia. J Clean Prod 18(16):1714–1721
Stockle CO (2002) Environmental impact of irrigation: a review. Washington State University
Tan XJ (2010) Study on water footprint of Chongqing after establishing municipality status
Wang X (2004) A study of simulated water trade in the four provinces in Central China. J South China Agric Univ 3:005
Wang X, Xu Z, Li Y (2005a) A rough estimate of water footprint of Gansu Province in 2003. J Nat Resour 6:015
Wang X, Zhang Z, Long A, Xu Z (2005b) Review of virtual water research. China Rural Water Hydropower 1:27–30
Wu H (2008) Theory of virtual water applied on industry structure of agriculture
Yadav R, Goyal B, Sharma R, Dubey S, Minhas P (2002) Post-irrigation impact of domestic sewage effluent on composition of soils, crops and ground water—a case study. Environ Int 28(6):481–486
Yearbook (2003–2011) Gansu Yearbook 2003–2011. China Stat. Press
Yu Y, Hubacek K, Feng K, Guan D (2010) Assessing regional and global water footprints for the UK. Ecol Econ 69(5):1140–1147
Zhang Y, Kendy E, Qiang Y, Changming L, Yanjun S, Hongyong S (2004) Effect of soil water deficit on evapotranspiration, crop yield, and water use efficiency in the North China plain. Agric Water Manage 64(2):107–122
Zhao X, Chen B, Yang Z (2009) National water footprint in an input–output framework—a case study of China 2002. Ecol Mod 220(2):245–253
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Zhang, C., McBean, E.A. & Huang, J. A Virtual Water Assessment Methodology for Cropping Pattern Investigation. Water Resour Manage 28, 2331–2349 (2014). https://doi.org/10.1007/s11269-014-0618-y
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DOI: https://doi.org/10.1007/s11269-014-0618-y