Valuing the impact of trade on local blue water

被引:40
作者
Biewald, Anne [1 ]
Rolinski, Susanne [1 ]
Lotze-Campen, Hermann [1 ,2 ]
Schmitz, Christoph [1 ]
Dietrich, Jan Philipp [1 ]
机构
[1] Potsdam Inst Climate Impact Res, D-14473 Potsdam, Germany
[2] Univ Berlin, D-10099 Berlin, Germany
关键词
Virtual water; Blue and green water; Water scarcity; Agricultural trade; VIRTUAL WATER; RESOURCES; FOOD; FOOTPRINTS; SCARCITY; FLOWS; GREEN; MODEL; LAND; VULNERABILITY;
D O I
10.1016/j.ecolecon.2014.02.003
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
International trade of agricultural goods impacts local water scarcity. By quantifying the effect of trade on crop production on grid-cell level and combining it with cell- and crop-specific virtual water contents, we are able to determine green and blue water consumption and savings. Connecting the information on trade-related blue water usage to water shadow prices gives us the possibility to value the impact of international food crop trade on local blue water resources. To determine the trade-related value of the blue water usage, we employ two models: first, an economic land- and water-use model, simulating agricultural trade, production and water-shadow prices and second, a global vegetation and agricultural model, modeling the blue and green virtual water content of the traded crops. Our study found that globally, the international trade of food crops saves blue water worth 2.4 billion US$. This net saving occurs despite the fact that Europe exports virtual blue water in food crops worth 3.1 billion US$. Countries in the Middle East and South Asia profit from trade by importing water intensive crops, countries in Southern Europe on the other hand export water intensive agricultural goods from water scarce sites, deteriorating local water scarcity. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:43 / 53
页数:11
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