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- W2981764054 abstract "Abstract. Feeding a growing population with global natural resource constraints becomes an increasingly challenging task. Changing spatial cropping patterns and international crop trade could contribute to sustain crop production and mitigate water scarcity. Previous studies on water saving through international food trade focussed either on comparing water productivities among food-trading countries or on analysing food trade in relation to national water endowments. Here, we consider, for the first time, how both differences in water productivities and water endowments can be considered to analyse comparative advantages of countries for different types of crop production. A linear optimization algorithm is used to find modifications in global cropping patterns that reduce blue water scarcity in the world's hotspots, under the constraint of current global production per crop and current cropland areas. The optimization considers national water and land endowments as well as water and land productivity per country per crop. The results are used to assess national comparative advantages and disadvantages for different crops. When allowing a maximum expansion of harvested area per crop per country of 10 %, the blue water scarcity in the world's most water-scarce countries can be greatly reduced. In this case, we could achieve a reduction of the current blue water footprint of crop production in the world of 9 % and a decrease of global total harvested area of 4 %." @default.
- W2981764054 created "2019-11-01" @default.
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- W2981764054 date "2019-10-28" @default.
- W2981764054 modified "2023-10-17" @default.
- W2981764054 title "Changing global cropping patterns to minimize blue water scarcity in the world's hotspots" @default.
- W2981764054 doi "https://doi.org/10.5194/hess-2019-461" @default.
- W2981764054 hasPublicationYear "2019" @default.
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