IMPREX - IMproving PRedictions and management of hydrological EXtremes

Future hydrological extremes may be very different from today's reality and difficult to predict. The objective of IMPREX is to support the reduction of Europe’s vulnerability to hydrological extremes through improved understanding of the intensity and frequency of future disrupting events.


Recent hydrological extreme events demonstrate the vulnerability of European society to water-related natural hazards, and there is strong evidence that climate change will worsen these events in the coming years. Changed water-related extremes will have important implications on the water sector and the design of water management practices. We do not only want to know what's going on with our climate, we also need to know how to respond and act. Enhancing our forecasting capability will increase the resilience of the European society as a whole, while reducing costs for strategic sectors and regions. IMPREX is built upon a strong team of experts from public and private sectors as well as universities and research institutes with complementary skills and experiences. The direct involvement of a broad range of users from key economic sectors will ensure the relevance of the project outputs.


Role of SMHI

The role of SMHI is threefold; first to provide date from dynamical downscaling with non-hydrostatic regional climate models in very high resolution, second to improve of short-term (days) prediction of extreme precipitation events by assimilating surface remote sensing data regarding snow and soil moisture in the Harmonie NWP model, and third to improve hydrological (E-HYPE) forecast skills of extreme events through data assimilation and multi-model combination across time scales. The forecasts will be evaluated in a number of case studies.

Funding and project period

This project will be carried out during 2015-2019 and received funding from the European Union's Horizon 2020 Programme under grant agreement No 641811.

Project partners

Koninklijk Nederlands Meteorologisch Instituut (KNMI)
Adelphi Research GmbH
Arctik - Environmental communication
Barcelona Supercomputing Centre - Centro Nacional de Supercomputación
Bundesanstalt für Gewässerkunde
Centro Internazionale in Monitoraggio Ambientale - Fondazione CIMA
Cetaqua, Centro Tecnológico del Agua, Fundación Privada
European Centre for Medium-Range Weather Forecasts
Helmholtz-Zentrum Geesthacht - Zentrum für Material- und Küstenforschung GmbH
Deutsches GeoForschungsZentrum
HKV Consultants
Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture
Met Office
Politecnico di Milano
Potsdam-Institut für Klimafolgenforschung
Stichting Deltares
Stichting Vu-VUmc
Stichting Water Footprint Network
Sveriges Meteorologiska och Hydrologiska Institut
The Research Committee of the Technical University of Crete
The University of Reading
Universitat Politecnica de Valencia

Contact person at SMHI: Erik Kjellström.