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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 5, issue 5 | Copyright

Special issue: HYDROPTIMET

Nat. Hazards Earth Syst. Sci., 5, 703-710, 2005
https://doi.org/10.5194/nhess-5-703-2005
© Author(s) 2005. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  21 Sep 2005

21 Sep 2005

An operational flash-flood forecasting chain applied to the test cases of the EU project HYDROPTIMET

A. C. Taramasso1,2, S. Gabellani1, and A. Parodi1 A. C. Taramasso et al.
  • 1CIMA, Centro di ricerca, Interuniversitario in Monitoraggio Ambientale, University of Genoa and Basilicata, Savona, Italy
  • 2DIST, Dipartimento di Informatica, Sistemistica e Telematica, University of Genoa, Genoa, Italy

Abstract. The application of a flash-flood prediction chain, developed by CIMA, to some testcases for the Tanaro river basin in the framework of the EU project HYDROPTIMET is presented here. The components of the CIMA chain are: forecast rainfall depths, a stochastic downscaling procedure and a hydrological model.

Different meteorological Limited Area Models (LAMs) provide the rainfall input to the hydrological component. The flash-flood prediction chain is run both in a deterministic and in a probabilistic configuration. The sensitivity of forecasting chain performances to different LAMs providing rainfall forecasts is discussed. The results of the application show how the probabilistic forecasting system can give, especially in the case of convective events, a valuable contribution in addressing the uncertainty at different spatio-temporal scales involved in the flash flood forecasting problem in small and medium basins with complex orography.

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