Abstract

The scarcity of water is the key factor which restricted the growth of social-economy. The virtual water theory provides a new way to solve the problem of water scarcity. In this thesis, we have calculated the virtual water consumption of each household grouped by income in the cities of Gansu in 1992-2005 after introduced the virtual water theory and calculations briefly. Then we advanced the indicator of virtual water per unit of consumption expenditure to analyze the efficiency of virtual water consumption. Additionally, we also used the diversity theory advanced by Ulanowicz, broadly employed by the ecologists and the biologists, to analyze the characters of virtual water consumption. Finally, we improve the Gini coefficient to get a virtual water inequality index to measure the distinction of each group’s virtual water consumption. After all, from this study we can find the way of saving water, in the view of virtual water, through changing the structure and pattern of consumption for increasing the consumption diversity but degrade the quality of living and reduced the demand of living. This suggestion is more important to Gansu in which the problem of water scarcity becomes more seriously. The consumption, for the role of guiding the production, is more important. The unsustainable consumption pattern, especially in the developing country, is the main factor causing the deterioration of the world environment. The sustainable consumption is an important aspect of developing human-being and building the ecological economics.

Keywords:

Diet, diversity index, inequality index, virtual water, virtual water per unit of consumption expenditure,

References

1. Allan, J.A., 1993. Fortunately there are Substitutes for Water Otherwise Our Hydro-political Futures would be Impossible. Priorities for Water Resources Allocation and Management. Overseas Development Administration, London, UK, pp: 13-26.
   
2. Allan, J.A., 1994. Overall Perspectives on Countries and Regions. In: Rogers, P. and P. Lydon (Eds.), Water in the Arab World: Perspectives and Prognoses. Harvard University Press, Cambridge, Massachusetts, pp: 65-100.
   PMid:8173544    
3. Allan, J.A., 1997. Virtual water: A long term solution for water short Middle Eastern economies? Paper Presented at the 1997 British Association Festival of Science, University of Leeds, September 9, 1997.
   
4. Allan, J.A., 2003a. Virtual water eliminates water wars? A case study from the Middle East. In: Hoekstra, A.Y. (Ed.), Virtual Water Trade. Proceeding of the International Expert Meeting on Virtual Water Trade. Value of Water Research Report Series No. 12, UNESCO-IHE, Delf, Netherlands.
   
5. Allan, J.A., 2003b. Virtual water-the water, food, trade nexus, useful concept or misleading metaphor? Water Int., 28(1): 4-10.
   CrossRef    
6. Allen, R.G., L.S. Pereira, D. Raes and M. Smith, 1998. Crop Evapotranspiration-guidelines for Computing Crop Water Requirements. FAO, Rome.
   
7. Chapagain, A.K. and A.Y. Hoekstra, 2003. Virtual water trade: A quantification of virtual water flows between nations in relation to international trade of livestock and livestock products. In: Hoekstra (Ed.), Virtual Water Trade: Proceeding of the International Expert Meeting on Virtual Water Trade. Value of Water Research Report Series No. 12, UNESCO-IHE Institute for Water Education, Delft, the Netherlands.
   PMid:15024775    
8. Chapagain, A.K. and A.Y. Hoekstra, 2004. Water footprints of nations. Value of Water Research Report Series No. 16, UNESCO-IHE, Delft, the Netherlands.
   
9. Chapagain, A.K. and A.Y. Hoekstra, 2007. Water footprints of nations: Water use by people as a function of their consumption pattern. Water Resour. Manag., 21: 35-48.
   
10. Cogoy, M., 1999. The consumer as a social and environmental actor. Ecol. Econ., 28(3): 385-398.
    CrossRef    
11. FAO, 2004. FAOSTAT On-line Database. Food and Agriculture Organization, Rome. Retrieved form: http://apps.fao.org/default.jsp.
    CrossRef    
12. Hoekstra, A.Y. and P.Q. Hung, 2002. Virtual water trade: A quantification of virtual water flows between nations in relation to international crop trade. Value of Water Research Report Series No. 11, IHE, Delft, the Netherlands.
    
13. Hoekstra, A.Y. and P.Q. Hung, 2003. Virtual water trade: A quantification of virtual water flows between nations in relation to international crop trade. In: Hoekstra, A.Y. (Ed.), Virtual Water Trade: Proceeding of the International Expert Meeting on Virtual Water Trade. Value of Water Research Report Series No. 12, IHE, Delft, the Netherlands.
    
14. Hoekstra, A.Y. and P.Q. Hung, 2005. Globalization of water resources: International virtual water flows in relation to crop trade. Global Environ. Chang., 15(1): 45-56.
    CrossRef    
15. Mainwaring, L., 2001. Environmental values and the frame of reference. Ecol. Econ., 38(3): 391-401.
    CrossRef    
16. Templet, P.H., 1990. Energy, diversity and development in economic systems: An empirical analysis. Ecol. Econ., 30(2): 223-233.
    CrossRef    
17. Templet, P.H., 1999. Energy, diversity and development in economic systems: An empirical analysis. Ecol. Econ., 30(2): 223-233.
    CrossRef    
18. Templet, P.H., 2000. Energy flow diversity and economic development. Int. J. Energ. Environ. Econ., 10(1): 23-38.
    
19. Ulanowicz, R.E., 1986. Growth and Development: Ecosystems Phenomenology. Springer-Verlag, New York.
    CrossRef    
20. Ulanowicz, R.E. and J.S. Norden, 1990. Symmetrical overhead in flow networks. Int. J. Syst. Sci., 21(2): 429-437.
    CrossRef    
21. Ulanowicz, R.E., 1997. Ecology, the Ascendant Perspective. Columbia University Press, New York.
    
22. Warner, J., 2003. Virtual water-virtual benefits? Scarcity, distribution, security and conflict reconsidered. In: Hoekstra, A.Y. (Ed.), Virtual Water Trade: Proceeding of the International Expert Meeting on Virtual Water Trade, Value of Water Research Report Series No. 12.
    
23. Wichelns, D., 2001. The role of 'virtual water' in efforts to achieve food security and other national goals, with an example from Egypt. Agr. Water Manage., 49(2): 131-151.
    CrossRef    
24. Xu, Z., G. Cheng, D. Chen and P.H. Templet, 2002. Economic diversity, development capacity and sustainable development of China. Ecol. Econ., 40(3): 369-378.
    CrossRef    

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