This is a description of EFAS v4.0. For an overview of other EFAS releases, please see: EFAS versioning system
Summary
EFAS 4.0 follows a complete upgrade of EFAS hydrological modelling system, with effect on all EFAS flood forecast products except ERICHA nowcasting; it also includes a number of new products and some changes in the way the flood alerts are calculated, as well as some minor changes in the web interface and general bug fixes.
Here is a a summary of the main changes:
- Hydrological modelling upgraded to 6-hourly time step for all EFAS products
- Upgrade of some static fields used in the hydrological modelling
- Recalibration of the hydrological model using 1137 river stations across the EFAS domain
- Upgrade of the statistical post-processing layer with new calibration and availability for over 1000 stations
- Medium-range return periods thresholds updated across the EFAS domain
- Forecasts weights for total probability updated (same weights for all forecasts)
- Three new static layers describing some hydrological modelling features (drainage network, location of lakes and reservoirs, location of fixed reporting points)
- Upgraded reporting points pop-up window graphics and tables:
- Plots accommodated to 6-hourly time step and show the initial conditions
- Modelled discharge hydrograph plots now available (with return period axis)
- Persistence table showing most recent forecasts on top
- New medium-range forecast performance layer
- Improved hydrological modelling performance layer
- Re-organisation of the layers menu for a more intuitive navigation
- One-click icon to access the EFAS wiki
- EFAS medium-range reforecasts available through MARS and CDS
- EFAS real-time seasonal forecasts and seasonal reforecasts available through MARS and CDS (from 10 November 2020)
- Added support for flash floods feedback, through simplified "yes/no" feedback form.
EFAS 4.0 Evaluation Results
- EFAS v4.0 hydrological modelling upgrade
- EFAS v4.0 calibration discharge data
- EFAS v4.0 calibration stations
- EFAS v4.0 calibration implementation
- EFAS v4.0 calibration parameters
- EFAS v4.0 hydrological model performance
- EFAS v4.0 medium range forecast skill
- EFAS v4.0 ERIC flash flood forecast skill
Technical details
| Release date | 2020-10-14 12UTC |
|---|---|
| In test suite | 2020-07-08 12 UTC |
EFAS internal release | 019 |
| Archiving of data | ECFS, MARS, CDS |
| Reference climatology (for thresholds/ anomalies) | 1991-01-01 to 2017-12-31 |
| EFAS Historical | 1991-01-01 to near present |
| Horizontal projection | ETRS89 Lambert Azimuthal Equal Area Coordinate Reference System (ETRS-LAEA) |
| Horizontal resolution | 5 x 5 km |
| Temporal resolution | 6-hourly for medium range-monthly products, 24-hourly for seasonal |