- Last updated
- November 5, 2014
- Terms of use
-
- Organization
- Federal Office for the Environment FOEN
- Categories
- Regions and cities, Environment
Description
The flood alert map shows the current flood danger level (1 to 5) for all and for the regions in relation to small and medium-sized rivers. The rivers of national interest are divided into individual stretches of river, each of which has a defined discharge gauging station. The forecast is based on a hydrological model and various weather models. Depending on how the forecasters assess and interpret the models, individual stretches of river and lakes are colour-coded by danger level. If necessary, the FOEN forecasters may request more detailed information on weather developments and the status of snow cover from MeteoSwiss and/or the WSL Institute for Snow and Avalanche Research (SLF). The FOEN also issues alerts and information when a strong increase in discharge is expected locally on small and medium-sized rivers. In such cases – especially during thunderstorms with heavy rainfall – it is not possible to predict precisely which water bodies will be affected. Therefore, the regions likely to be affected are marked on the flood alert map. For small and medium-sized rivers, there are only two possible danger levels in advance of an event: low/no danger (green) and flood danger (yellow, no indication of severity). Red is also used to indicate a very large flood in progress; this is based on current readings and is not issued in advance.
Resources
Additional information
- Identifier
- e1d0c17a-0dbd-4455-bc83-1606e1e04298@bundesamt-fur-umwelt-bafu
- Issued date
- November 5, 2014
- Modified date
- -
- Publisher
- Bundesamt für Umwelt / Abteilung Hydrologie
- Contact points
- hydrologie@bafu.admin.ch
- Languages
-
- English
- German
- French
- Italian
- Further information
- Landing page
- https://www.hydrodaten.admin.ch/de/hochwasserkarte
- Documentation
-
- Temporal coverage
- -
- Spatial coverage
- Schweiz
- Update interval
- -
- Metadata Access
- API (JSON) Download XML
