Abstract
Although the Upper Danube region is currently not suffering under water scarcity and thus the availability of drinking water is not a key issue, it is important to investigate the potential impacts of climate change on groundwater recharge in the Upper Danube drainage, because more than 90 % of the drinking water in this region is sourced from groundwater. Therefore, all of the climate scenarios of the GLOWA-Danube project, including their four statistical climate variants, as well as the climate variants of the REMO downscaled and bias-corrected and MM5 downscaled and bias-corrected regional climate models for the Upper Danube basin were calculated with the DANUBIA model framework. This resulted in a total of 18 model scenario runs which all show a significant decrease in GWR particularly in the summer months due to the climate change-induced decline of rainfall and higher evapotranspiration rates in the summer. For example, the proportion of the total annual groundwater recharge in the summer months is approximately 29 % for the reference period and will decline to 17 % based on the REMO regional–Baseline scenario. The predicted decrease in GWR for the period 2011–2060 fluctuates between 33 and 125 mm. The results of DANUBIA show that there is a significant change in GWR due to climate change in the Upper Danube region based on the model scenarios.
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Reference
Emmert M (1999) Die Wasserversorgung im deutschen Einzugsgebiet der Donau. Wasserwirtschaft 89(7–8):396–403
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© 2016 Springer International Publishing Switzerland
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Heinzeller, C. (2016). Groundwater Recharge Under Scenario Conditions. In: Mauser, W., Prasch, M. (eds) Regional Assessment of Global Change Impacts. Springer, Cham. https://doi.org/10.1007/978-3-319-16751-0_59
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DOI: https://doi.org/10.1007/978-3-319-16751-0_59
Publisher Name: Springer, Cham
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