The water for food paradox

被引:8
作者
Chartres, C. [1 ,2 ]
Sood, A. [1 ]
机构
[1] Int Water Management Inst, Colombo, Sri Lanka
[2] eWater, Innovat Ctr, Bruce, ACT 2617, Australia
来源
AT THE CONFLUENCE - SELECTION FROM THE 2012 WORLD WATER WEEK | 2013年 / 1卷
关键词
water security; climate change water demand; water scarcity; food security;
D O I
10.1016/j.aqpro.2013.07.002
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This paper considers whether there will be sufficient water available to grow enough food for a predicted global population of 9 billion in 2050, based on three population and GDP growth modelling scenarios. Under the a low population growth with high GDP growth scenario, global consumptive water demand is forecast to increase significantly to over 6,000 km(3), which is approximately 3,000 km3 greater that consumptive use in the year 2000. Also of concern is that rising global temperatures are going to increase potential evaporation, and thus irrigation water demand, by up to 17%. Sustainable intensification of agriculture can provide solutions to this predicament. However, productivity growth is not fast enough and we face considerable risks in the next 20 to 30 years. Concerted action to combat food insecurity and water scarcity is required based on agricultural research and development, policy reform and greater water productivity, if the world is to feed its growing population. (C) 2013 The Authors. Published by Elsevier B.V.
引用
收藏
页码:3 / 19
页数:17
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