In view of the next major upgrade of the Copernicus Emergency Management Service European Flood Awareness System (CEMS EFAS), a new EFAS v5.0 hydrological reanalysis dataset has been produced. This dataset enables users to analyse past floods or low-flow events, identify hydrological trends and prepare for the upcoming major release of the operational EFAS.
The EFAS v5.0 hydrological reanalysis dataset includes 6-hourly maps of discharge (in m3/s) for the European extended domain at 0.0167 degrees (~1.4 km) grid resolution.
The EFAS v5.0 hydrological reanalysis dataset features several major changes in comparison to the EFAS streamflow Reanalysis v4.0:
The spatial resolution of the dataset was increased from 5 km to ~1.4 km, allowing for a more accurate representation of the river network.
The open-source hydrological model LISFLOOD was developed further including upgrades in the hydrological routines and significant improvements in the management of large input datasets and computational performance.
The latest state-of-the-art satellite-derived datasets, as well as a large number of ground measurements, were used to generate new input maps to LISFLOOD. These entirely revamped input maps describe with higher accuracy the morphological, pedological, vegetation, and land use characteristics of the catchments.
A new model calibration at 1903 gauging stations and subsequently a parameter regionalization for ungauged catchments were performed to ensure the best possible simulation of river flows.
The initial release of the new dataset makes river discharge data available from 1992 onwards. In the last quarter of 2023, this dataset will be widened to other variables, such as soil moisture and snow water equivalent.
More information on the technical documentation of the new EFAS v5.0 hydrological reanalysis can be found on the EFAS Wiki.
The new EFAS v5.0 hydrological reanalysis dataset can be accessed and downloaded from the Climate Data Store of the Copernicus Climate Change Service.