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Wasser_kap3.1.15

3.1.15 Assessment of global scale water stress indicators (Martina Flörke & Joseph Alcamo)

(only in english language)

Assessment of global scale water stress indicators: A global water model is used to identify hot spot regions of future water stress and to determine the number of people living with severe water stress. The impacts of climate change and socio-economic driving forces derived from the A2 and B2 IPCC scenarios are analysed. Climate change impacts are considered using future climate data on temperature and precipitation generated by two different climate models, ECHAM4/OPYC3 and HadCM3. Depending on the scenario, climate model, and indicator, the number of people living in river basins with severe water stress increases by a factor of 2.5 to 3.5 between current conditions and 2075.