Articles | Volume 27, issue 2
Research article
18 Jan 2023
Research article |  | 18 Jan 2023

Intercomparison of global reanalysis precipitation for flood risk modelling

Fergus McClean, Richard Dawson, and Chris Kilsby

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Cited articles

Addy, S. and Wilkinson, M. E.: Embankment lowering and natural self-recovery improves river-floodplain hydro-geomorphic connectivity of a gravel bed river, Sci. Total Environ., 770, 144626,, 2021. 
Albergel, C., Dutra, E., Munier, S., Calvet, J.-C., Munoz-Sabater, J., de Rosnay, P., and Balsamo, G.: ERA-5 and ERA-Interim driven ISBA land surface model simulations: which one performs better?, Hydrol. Earth Syst. Sci., 22, 3515–3532,, 2018. 
Alfieri, L., Burek, P., Dutra, E., Krzeminski, B., Muraro, D., Thielen, J., and Pappenberger, F.: GloFAS – global ensemble streamflow forecasting and flood early warning, Hydrol. Earth Syst. Sci., 17, 1161–1175,, 2013. 
Andreadis, K. M., Schumann, G. J.-P., Stampoulis, D., Bates, P. D., Brakenridge, G. R., and Kettner, A. J.: Can Atmospheric Reanalysis Data Sets Be Used to Reproduce Flooding Over Large Scales?, Geophys. Res. Lett., 44, 10369-10377,, 2017. 
Arshad, M., Ma, X., Yin, J., Ullah, W., Liu, M., and Ullah, I.: Performance evaluation of ERA-5, JRA-55, MERRA-2, and CFS-2 reanalysis datasets, over diverse climate regions of Pakistan, Weather Clim. Extrem., 33, 100373,, 2021. 
Short summary
Reanalysis datasets are increasingly used to drive flood models, especially for continental and global analysis. We investigate the impact of using four reanalysis products on simulations of past flood events. All reanalysis products underestimated the number of buildings inundated, compared to a benchmark national dataset. These findings show that while global reanalyses provide a useful resource for flood modelling where no other data are available, they may underestimate impact in some cases.