This map shows baseline water stress in major crop producing areas. Baseline water stress is measure of demand and supply for water in a given area, and is calculated as the ratio of local water withdrawal over available water supply. Crop production in each category is computed by overlaying gridded crop production data.
Water stress data
Gassert, F., M. Luck, M. Landis, P. Reig, and T. Shiao. 2013. “Aqueduct Global Maps 2.0.” Working Paper. Washington, DC: World Resources Institute. Available online at
http://wri.org/publication/aqueduct-metadata-global
Global crop yield data
Monfreda, C., N. Ramankutty, and J. Foley. 2008. "Farming the planet: 2. Geographic distribution of crop areas, yields, physiological types, and net primary production in the year 2000." Global Biogeochemical Cycles. Vol.22, GB1022, doi:10.1029/2007GB002947. Available at
http://www.geog.mcgill.ca/~nramankutty/Datasets/Datasets.html
Cropland
Ramankutty, N., A. Evan, C. Monfieda, and J. Foley. 2008. "Farming the planet: 1. Geographic distribution of global agricultural lands in the year 2000." Global Biogeochemical Cycle Vol. 22, GB1003, doi:10.1029/2007GB002952. Available at
http://www.geog.mcgill.ca/~nramankutty/Datasets/Datasets.html.
Irrigated areas
S. Siebert, V. Henrich, K. Frenken, and J. Burke. 2013. Global Map of Irrigation Areas version 5. Rheinische Friedrich-Wilhelms-University, Bonn, Germany / Food and Agriculture Organization of the United Nations, Rome, Italy. Available at
http://www.fao.org/nr/water/aquastat/irrigationmap/index10.stm
Crop water footprints
Mekonnen, M. and A. Hoekstra. 2011. The green, blue and grey water footprint of crops and derived crop products. Hydrology and Earth System Sciences, 15(5): 1577-1600.
http://www.waterfootprint.org/Reports/Mekonnen-Hoekstra-2011-WaterFootprintCrops.pdf