Articles | Volume 383
Post-conference publication
16 Sep 2020
Post-conference publication |  | 16 Sep 2020

The Groundwater Drought Initiative (GDI): Analysing and understanding groundwater drought across Europe

Bentje Brauns, Daniela Cuba, John P. Bloomfield, David M. Hannah, Christopher Jackson, Ben P. Marchant, Benedikt Heudorfer, Anne F. Van Loon, Hélène Bessière, Bo Thunholm, and Gerhard Schubert

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Cited articles

Bloomfield, J. P. and Marchant, B. P.: Analysis of groundwater drought building on the standardised precipitation index approach, Hydrol. Earth Syst. Sci., 17, 4769–4787,, 2013. 
Bloomfield, J. P., Marchant, B. P., Bricker, S. H., and Morgan, R. B.: Regional analysis of groundwater droughts using hydrograph classification, Hydrol. Earth Syst. Sci., 19, 4327–4344,, 2015. 
Changnon, S. A.: Detecting drought conditions in Illinois, Illinois State Water Survey, Champaign, USA, available at: (last access: 24 July 2020), Circular, 169, 1987. 
European Environment Agency (EEA): Groundwater quality and quantity in Europe, European Environment Agency, Copenhagen, Denmark, 123 pp., 1999. 
Haylock, M. R., Hofstra, N., Klein Tank, A. M. G., Klok, E. J., Jones, P. D., and New, M.: A European daily high-resolution gridded dataset of surface temperature and precipitation, J. Geophys. Res., 113, D20119,, 2008. 
Short summary
In Europe, ca. 65% of drinking water is groundwater. Its replenishment depends on rainfall, but droughts may cause groundwater levels to fall below normal. These groundwater droughts can limit supply, making it crucial to understand their regional connection. The Groundwater Drought Initiative (GDI) assesses spatial patterns in historic—recent groundwater droughts across Europe for the first time. Using an example dataset, we describe the background to the GDI and its methodological approach.