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Compendium on methods and tools to evaluate impacts of, and vulnerability and adaptation to, climate
change
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Agroclimatic Water Stress Mapping
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Description
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The agroclimatic water stress mapping tool provides a global, near real-time warning of current and
future agricultural emergencies indicating areas where excess or deficit rainfall is likely to
produce serious damage to rainfed agriculture or pastures. Furthermore, the tool can use seasonal
forecast data to produce maps identifying the probability of water deficit or surplus conditions in
the coming months.
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Appropriate Use
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Global assessment of current and future areas with excess and deficit rainfall allows early warning
for the on-going growing season.
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Scope
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Global, agricultural sector.
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Key Output
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Digital water stress maps by comparing actual and average monthly precipitation digital maps at
0.5° of resolution during the periods when agricultural activities are more
“sensitive” to water stress.
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Key Input
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Long-term average rainfall. Long-term temperature and potential evapotranspiration to identify the
regions with active growing seasons. Real-time rainfall data provided by the German Weather service
(DWD). Real-time seasonal forecast provided by DEMETER project.
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Ease of Use
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Centralized server driven by FAO, the water stress maps can be downloaded from the FAO website (see
documentation). There is no stand-alone version available.
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Training Required
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None
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Training Available
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None
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Computer Requirements
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None
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Documentation
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See http://www.fao.org/nr/climpag/hot_2_en.asp.
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Applications
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Drought and flood monitoring over agricultural areas. Currently, internal use by FAO for global
assessments of water stress. See also: http://www.fao.org/nr/climpag/hot_2_en.asp.
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Contacts for Framework, Documentation, Technical Assistance
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René Gommes, Michele Bernardi
Environment, Climate Change and Bioenergy Division (NRC), FAO, Viale delle Terme di Caracalla, 00153
Rome, Italy; e-mails: rene.gommes@fao.org, michele.bernardi@fao.org.
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Cost
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None
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References
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See http://www.fao.org/nr/climpag/hotspots/maps_en.asp.
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