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摘要

The world faces emerging crises of water and food. Its population already nears seven billion and is forecast to be at least nine billion by 2050. The increased population will need 70% more food than it does today (Bruinsma 2009), which has major implications for the global environment that supports the food system. That goal will be a lot harder to achieve than the green revolution of last century.rnWhere will the water come from to produce 70% more food when agriculture already uses 70% of the world's freshwater resources? In the case of the Indus, the Yellow, and the Nile, the basins are essentially closed, that is, all the water is used. In some cases, the environmental flows essential to maintain ecosystem functions in the river estuaries have ceased or are threatened. The only solution in closed basins is to increase water productivity (WP) of crops by using the water more efficiently, what former UN Secretary General Kofi Annan called, "More crop per drop" (Annan 2000).
机译:世界面临着不断出现的水和粮食危机。它的人口已经接近70亿,预计到2050年将至少达到90亿。与今天相比,增加的人口将需要更多的粮食(Bruinsma 2009),这对支持粮食系统的全球环境具有重大影响。与上个世纪的绿色革命相比,要实现这个目标要困难得多。rn如果农业已经消耗了世界70%的淡水资源,水从哪里来生产70%以上的食物?在印度河,黄河和尼罗河的情况下,盆地基本上是封闭的,也就是说,所有的水都被使用了。在某些情况下,维持河口生态系统功能所必需的环境流量已经停止或受到威胁。封闭流域中唯一的解决方案是通过更有效地利用水来提高农作物的水分生产率(WP),前联合国秘书长科菲·安南(Kofi Annan)称其为“每滴作物增加产量”(Annan 2000)。

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  • 来源
    《Water International》 |2010年第5期|p.465-471|共7页
  • 作者

    Myles Fisher; Simon Cook;

  • 作者单位

    Consultants,Challenge Programme on Water and Food (CPWF) Cali, Colombia and Perth, Australia;

    rnConsultants,Challenge Programme on Water and Food (CPWF) Cali, Colombia and Perth, Australia Formerly leader, Basin Focal Projects, CPWF;

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