Deep learning shows declining groundwater levels in Germany until 2100 due to climate change

Andreas Wunsch (), Tanja Liesch and Stefan Broda
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Andreas Wunsch: Karlsruhe Institute of Technology
Tanja Liesch: Karlsruhe Institute of Technology
Stefan Broda: Federal Institute for Geosciences and Natural Resources

Nature Communications, 2022, vol. 13, issue 1, 1-13

Abstract: Abstract In this study we investigate how climate change will directly influence the groundwater resources in Germany during the 21st century. We apply a machine learning groundwater level prediction approach based on convolutional neural networks to 118 sites well distributed over Germany to assess the groundwater level development under different RCP scenarios (2.6, 4.5, 8.5). We consider only direct meteorological inputs, while highly uncertain anthropogenic factors such as groundwater extractions are excluded. While less pronounced and fewer significant trends can be found under RCP2.6 and RCP4.5, we detect significantly declining trends of groundwater levels for most of the sites under RCP8.5, revealing a spatial pattern of stronger decreases, especially in the northern and eastern part of Germany, emphasizing already existing decreasing trends in these regions. We can further show an increased variability and longer periods of low groundwater levels during the annual cycle towards the end of the century.

Date: 2022
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DOI: 10.1038/s41467-022-28770-2

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