Estimation of Water Footprint Components of Iran's Wheat Production: Comparison of Global and National Scale Estimates

被引：45

作者：

Ababaei B. ^{[1
]}

Etedali H.R. ^{[2
]}

机构：

[1] Young Researchers and Elites Club, Science and Research Branch, Islamic Azad University, Tehran

[2] Department of Water Engineering, Imam Khomeini International University, Qazvin

来源：

Environmental Processes | 2014年 / 1卷 / 3期

关键词：

National scale; Provincial scale; Virtual water; Water footprint; Wheat;

D O I：

10.1007/s40710-014-0017-7

中图分类号：

学科分类号：

摘要：

The water footprint (WF) of national wheat production has been previously estimated for the whole world in global-scale studies. These studies used assumptions which must be assessed and evaluated by estimates from national or regional studies. Here, previous estimates of different components (green, blue, gray and white) of WF of national wheat production in Iran were compared to the national-scale estimates. A new component (white WF) was proposed to account for the irrigation losses. Different components of the wheat WF were estimated for 236 plains over fifteen major wheat producing provinces. Then, the average values of each province were estimated. Finally, the weighted average values of each WF component were estimated by using the shares of irrigated and rainfed productions as weighting factors. The average total WF for irrigated areas and between all selected provinces is about 3,188 m3/ton with comparable shares of blue and green water, while the average total WF for rainfed areas is about 3,071 m3/ton with the share of the green WF nine times that of the gray WF. The results show that the total national WF of wheat production for the period 2006-2012 is about 42,143 million cubic meters (MCM) per year (41 % green, 18 % blue, 16 % gray and 25 % white) with the share of the green WF about 2.3 times the blue WF. Comparison of the obtained estimates with the results of the previous studies at a global scale revealed that estimating the WFs of crops at a global scale, ignores the variations of climatic conditions, water resources availability and crop yields at the national and regional levels and some of the assumptions made in global-scale studies must be reassessed. © 2014 Springer International Publishing Switzerland.

引用

页码：193 / 205

页数：12

共 37 条

[1]

Aldaya M.M., Hoekstra A.Y., The Water Needed for Italians to eat Pasta and Pizza, Agr Syst, 103, pp. 351-360, (2010)

[2]

Aldaya M.M., Allan J.A., Hoekstra A.Y., Strategic Importance of Green Water in International Crop Trade, Ecol Econ, 69, 4, pp. 887-894, (2010)

[3]

Allan J.A., Virtual Water - The Water, Food, and Trade Nexus: Useful Concept or Misleading Metaphor?, Water Inter, 28, 1, pp. 106-113, (2003)

[4]

Allen R.G., Pereira L.S., Raes D., Smith M., Crop evapotranspiration: Guidelines for computing crop water requirements, FAO Drainage and Irrigation Paper 56, (1998)

[5]

Chapagain A.K., Hoekstra A.Y., Water footprints of nations, Value of Water Research, (2004)

[6]

Chapagain A.K., Hoekstra A.Y., Savenije H.H.G., Water Saving Through International Trade of Agricultural Products, Hydrol Earth Syst Sci, 10, pp. 455-468, (2006)

[7]

De Fraiture C., Cai X., Amarasinghe U., Rosegrant M., Molden D., Does international cereal trade save water? the impact of virtual water trade on global water use, Comprehensive Assessment Research Report, Vol 4, (2004)

[8]

Gerbens-Leenes W., Hoekstra A.Y., Van Der Meer T.H., The Water Footprint of Bioenergy, Proc Natl Acad Sci U S A, 106, 25, pp. 10219-10223, (2009)

[9]

Gleick P.H., Water in Crisis: A Guide to the World's Fresh Water Resources, (1993)

[10]

Hoekstra A.Y., Virtual Water Trade: Proceedings of the International Expert Meeting on Virtual Water Trade, Delft, the Netherlands, 12-13 December 2002, Value of Water Research Report Series No12, UNESCO-IHE, (2003)

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