20.500.12556/RUL-148005 Validation of precipitation reanalysis products for rainfall-runoff modelling in Slovenia Observational data scarcity often limits the potential of rainfall-runoff modelling around the globe. In ungauged catchments, earth observations or reanalysis products could be used to replace missing ground-based station data. However, performance of different datasets needs to be thoroughly tested, especially at finer temporal resolutions such as hourly time steps. This study evaluates the performance of ERA5-Land and COSMO-REA6 precipitation reanalysis products (PRPs) using 16 meso-scale catchments (41–460 km$^2$) located in Slovenia, Europe. These two PRPs are firstly compared with a gridded precipitation dataset that was constructed based on ground observational data. Secondly, a comparison of the temperature data of these reanalysis products with station-based air temperature data is conducted. Thirdly, several data combinations are defined and used as input for the rainfall-runoff modelling using the GR4H model. A special focus is on the application of an additional snow module. Both tested PRPs underestimate, for at least 20 %, extreme rainfall events that are the driving force of natural hazards such as floods. In terms of air temperature, both tested reanalysis products show similar deviations from the observational dataset. Additionally, air temperature deviations are smaller in winter compared to summer. In terms of rainfall-runoff modelling, the ERA5-Land yields slightly better performance than COSMO-REA6. If a recalibration with PRP has been carried out, the performance is similar compared to the simulations where station-based data were used as input. Model recalibration proves to be essential in providing relatively sufficient rainfall-runoff modelling results. Hence, tested PRPs could be used as an alternative to the station-based data in case precipitation or air temperature data are lacking, but model calibration using discharge data would be needed to improve the performance. hydrology precipitation surface runoff modelling reanalysis hidrologija padavine površinski odtok modeliranje reanalize true false true Angleški jezik Slovenski jezik Članek v reviji 2023-07-18 10:36:40 2023-07-18 10:36:49 2023-11-22 09:43:15 0000-00-00 00:00:00 2023 0 0 Str. 2559-2578 iss. 13 Vol. 27 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 004.4:556.12(497.4) 1607-7938 10.5194/hess-27-2559-2023 159084291 nbezak@fgg.uni-lj.si-hess-27-2559-2023.pdf nbezak@fgg.uni-lj.si-hess-27-2559-2023.pdf 1 F2B7B8ADA116A89F51079E1CE68ADEE2 6cecc69c82044725d101e2dbb5d461da2e62d6baa886d453c0690cc5dfe8a46e 5b7e37ee-2546-11ee-aeaf-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=171923 https://hess.copernicus.org/articles/27/2559/2023/ 1 3c3a72ce-2546-11ee-aeaf-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=171921 Fakulteta za gradbeništvo in geodezijo 0 0 0