Accurate meteorological forcings are a fundamental component for reliable hydrological modeling. Gridded meteorological products offer spatially distributed information facilitating hydrological model applications: they are a convenient alternative to the ad-hoc spatial interpolation of ground measures for the estimation of the spatial fields of precipitation and temperature. In addition, they are often available at large scale (e.g. regional or continental scale), easing the application on large basin samples, and generally enhancing the replicability of the experiments. Nevertheless, the accuracy of these products varies consistently in space and it must be rigorously assessed to ensure the validity of model simulations. This study aims to assess the accuracy of two daily gridded meteorological products, namely E-OBS and ERG5- Eraclito, in a set of catchments within the Emilia-Romagna region, Italy. To evaluate their reliability, we adopt an indirect evaluation method by assessing the performance of a conceptual hydrological model forced with the two gridded meteorological products, over a set of catchments in the region. E-OBS gridded dataset is produced by the European Climate Assessment & Dataset (ECA&D) project, which aims to provide climate data to support various research and policy applications (Cornes et al., 2018). The dataset comprises daily climatic variables at 0.1° x 0.1° over Europe. On the other hand, ERG5-Eraclito is developed and maintained by the Agenzia Regionale per la Prevenzione e l'Ambiente dell'Emilia-Romagna (ARPAE, Antolini et al., 2016). This dataset offers 5 x 5 km daily climatic variables over the hydrological boundaries of the Emilia-Romagna region. For the study catchments, two distinct meteorological forcings including areal mean precipitation, temperature, and potential evapotranspiration (via a simplified radiation approach) were estimated using the two gridded products. The daily streamflow data obtained from ARPAE for the period 2003-2021 has undergone a validation process. The rainfall-runoff model used for the indirect validation is the CemaNeige-GR6J (Coron et al., 2017; Coron et al., 2023): it is a daily lumped and continuously simulating hydrological model. The model combines the CemaNeige snow accounting routine with the GR6J conceptual rainfall-runoff model. We investigate the performances of the model in simulating streamflow, in order to get insights on the reliability of the gridded products, over the different catchments and along the years.
Sarigil, G., Neri, M., Toth, E. (2023). Evaluating the Accuracy of Regional and European Gridded Precipitation Products in Emilia Romagna: An Indirect Assessment Through Rainfall–Runoff Model Application.
Evaluating the Accuracy of Regional and European Gridded Precipitation Products in Emilia Romagna: An Indirect Assessment Through Rainfall–Runoff Model Application
Sarigil G.;Neri M.;Toth E.
2023
Abstract
Accurate meteorological forcings are a fundamental component for reliable hydrological modeling. Gridded meteorological products offer spatially distributed information facilitating hydrological model applications: they are a convenient alternative to the ad-hoc spatial interpolation of ground measures for the estimation of the spatial fields of precipitation and temperature. In addition, they are often available at large scale (e.g. regional or continental scale), easing the application on large basin samples, and generally enhancing the replicability of the experiments. Nevertheless, the accuracy of these products varies consistently in space and it must be rigorously assessed to ensure the validity of model simulations. This study aims to assess the accuracy of two daily gridded meteorological products, namely E-OBS and ERG5- Eraclito, in a set of catchments within the Emilia-Romagna region, Italy. To evaluate their reliability, we adopt an indirect evaluation method by assessing the performance of a conceptual hydrological model forced with the two gridded meteorological products, over a set of catchments in the region. E-OBS gridded dataset is produced by the European Climate Assessment & Dataset (ECA&D) project, which aims to provide climate data to support various research and policy applications (Cornes et al., 2018). The dataset comprises daily climatic variables at 0.1° x 0.1° over Europe. On the other hand, ERG5-Eraclito is developed and maintained by the Agenzia Regionale per la Prevenzione e l'Ambiente dell'Emilia-Romagna (ARPAE, Antolini et al., 2016). This dataset offers 5 x 5 km daily climatic variables over the hydrological boundaries of the Emilia-Romagna region. For the study catchments, two distinct meteorological forcings including areal mean precipitation, temperature, and potential evapotranspiration (via a simplified radiation approach) were estimated using the two gridded products. The daily streamflow data obtained from ARPAE for the period 2003-2021 has undergone a validation process. The rainfall-runoff model used for the indirect validation is the CemaNeige-GR6J (Coron et al., 2017; Coron et al., 2023): it is a daily lumped and continuously simulating hydrological model. The model combines the CemaNeige snow accounting routine with the GR6J conceptual rainfall-runoff model. We investigate the performances of the model in simulating streamflow, in order to get insights on the reliability of the gridded products, over the different catchments and along the years.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
