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Green and blue water demand from large-scale land acquisitions in Africa

"Since 2000, foreign investors have contracted an area the size of the United Kingdom in Africa, leading to increased pressure on water resources"
water droplets on leaf

Land grabbing, a term for when land is contracted to other countries, leads to competition over water and high socioeconomical challenges. LUCCI-affiliated Jonathan Seaquist and colleagues with first author Emma Li Johansson (LU) recently published a paper in PNAS: "Green and blue water demands from large-scale acquisitions in Africa", describing the increased competition over water resourcesfor irrigation of crops with high water demand. Green water meaning precipitaion stored in soils consumed by plants, and blue water extracted from water reservoirs such as dams, rivers etc.

The authors have studied the water demand of land aqusition areas in Africa, with regard to local climate, choice of crop and water use in irrigation scenarios, highlighting also in the discussion the socio-ecologial aspects.

 

PNAS doi: 10.1073/pnas.1524741113

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