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HESS | Articles | Volume 23, issue 9
Hydrol. Earth Syst. Sci., 23, 3823–3841, 2019
https://doi.org/10.5194/hess-23-3823-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: Hydrological cycle in the Mediterranean (ACP/AMT/GMD/HESS/NHESS/OS...

Hydrol. Earth Syst. Sci., 23, 3823–3841, 2019
https://doi.org/10.5194/hess-23-3823-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 18 Sep 2019

Research article | 18 Sep 2019

Using nowcasting technique and data assimilation in a meteorological model to improve very short range hydrological forecasts

Maria Laura Poletti et al.

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Acquaotta, F., Faccini, F., Fratianni, S., Paliaga, G., and Sacchini, A.: Rainfall intensity in the Genoa Metropolitan Area: secular variations and consequences, Weather, 73, 356–362, https://doi.org/10.1002/wea.3208, 2018. 
Antonetti, M., Horat, C., Sideris, I. V., and Zappa, M.: Ensemble flood forecasting considering dominant runoff processes – Part 1: Set-up and application to nested basins (Emme, Switzerland), Nat. Hazards Earth Syst. Sci., 19, 19–40, https://doi.org/10.5194/nhess-19-19-2019, 2019. 
Atencia, A., Rigo, T., Sairouni, A., Moré, J., Bech, J., Vilaclara, E., Cunillera, J., Llasat, M. C., and Garrote, L.: Improving QPF by blending techniques at the Meteorological Service of Catalonia, Nat. Hazards Earth Syst. Sci., 10, 1443–1455, https://doi.org/10.5194/nhess-10-1443-2010, 2010. 
Berenguer, M., Corral, C., Sánchez-Diezma, R., and Sempere-Torres, D.: Hydrological validation of a radar-based nowcasting technique, J. Hydrometeorol., 6, 532–549, https://doi.org/10.1175/JHM433.1 , 2005. 
Berenguer, M., Sempere-Torres, D., and Pegram, G. G.: SBMcast – An ensemble nowcasting technique to assess the uncertainty in rainfall forecasts by Lagrangian extrapolation, J. Hydrol., 404, 226–240, https://doi.org/10.1016/j.jhydrol.2011.04.033 , 2011. 
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In this work a probabilistic rainfall nowcasting model, a non-hydrostatic high-resolution numerical weather prediction (NWP) model corrected with data assimilation, and a distributed hydrological model are used together with radar observations to implement a hydrological nowcasting chain. This chain is used to obtain a useful discharge prediction in small catchments with a time horizon of 2–8 h.
In this work a probabilistic rainfall nowcasting model, a non-hydrostatic high-resolution...
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