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Global water
stress maps
Methods and tools
Global water stress maps
In order to provide a global, real-time and qualitative warning of current and future agricultural emergencies, Agroclimatic Hotspots maps will indicate areas where excess or deficit over the expected rainfall is likely to produce serious damage to rainfed agriculture or pastures.

The risk can be weighted with other coexistent critical factors, for instance high population density or high soil degradation. The use of downloadable digital grids improves the flexibility of this product.

The methodology used to produce the Global Water Stress Maps in digital form consists in comparing actual and average monthly precipitation digital maps at 1.0° of spatial resolution during the periods when agricultural activities are more “sensitive” to water stress, i.e. in the zones where the combination of rainfall, mean temperature and potential evapotranspiration average patterns produces an active “growing season”. Over a given period of time, selected by the user, the final maps show the percentage of the agricultural season affected by precipitation excess and/or deficit.

Input data are provided by the Global Precipitation Climatology Centre (GPCC) operated by the operated by the Deutscher Wetterdienst (DWD, National Meteorological Service of Germany).

Global water stress maps

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