Quality control, validation and user feedback of the European Flood Alert System (EFAS)

Ad de Roo, Jutta Thielen, Peter Salamon, Konrad Bogner, Sebastien Nobert, Hannah Cloke, David Demeritt, Jalal Younis, Milan Kalas, Katalin Bódis, Davide Muraro, Florian Pappenberger

Research output: Contribution to journalArticle (Academic Journal)peer-review

14 Citations (Scopus)


The quality control, validation and verification of the European Flood Alert System (EFAS) are described. EFAS is designed as a flood early warning system at pan-European scale, to complement national systems and provide flood warnings more than 2 days before a flood. On average 20-30 alerts per year are sent out to the EFAS partner network which consists of 24 National hydrological authorities responsible for transnational river basins. Quality control of the system includes the evaluation of the hits, misses and false alarms, showing that EFAS has more than 50% of the time hits. Furthermore, the skills of both the meteorological as well as the hydrological forecasts are evaluated, and are included here for a 10-year period. Next, end-user needs and feedback are systematically analysed. Suggested improvements, such as real-time river discharge updating, are currently implemented.

Original languageEnglish
Pages (from-to)77-90
Number of pages14
JournalInternational Journal of Digital Earth
Issue numberSUPPL. 1
Publication statusPublished - 1 Nov 2011


  • EFAS
  • Flood
  • Forecasting
  • Probabilistic
  • Skill
  • Warning

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