For lager water bodies, the federal state Rhineland-Palatinate is operating a flood warning service together with the federal administration for waterways and navigation (Wasser- und Schifffahrtsverwaltung) and concerning the federal navigation lanes of the Rhine, Lahn, Moselle and Saar. Based on administrative agreements with neighbouring federal states and the federal administration for waterways and navigation the Flood Warning Centre Rhine is in charge of forwarding flood announcement for the entire German section of the Rhine. The staff of the Landesamt für Umwelt, Wasserwirtschaft und Gewerbeaufsicht in Rhineland-Palatinate (LUWG) and of the Centre for Hydrology belonging to the Wasser- und Schifffahrtsdirektion Südwest (WSD) is in charge of the flood warning services.
Using a hydrodynamic model developed by the Federal Institute for Hydrology (BfG), the Flood Warning Centre calculates water level forecasts for up to 24 hours and more and estimates up to 48 hours in advance for the most important gauging stations along the Rhine. The forecasts established by the Flood forecasting centre (HVZ) Baden-Württemberg for the gauging stations Maxau/Rhine and Rockenau/Neckar are applied and integrated into this model. The Dutch forecasting centre of the Rijkswaterstaat – Waterdienst (RWS WD) Lelystad uses forecasts established by the HMZ for the Andernach gauging station as input for water level forecasts for the stage of the Rhine at Lobith on the German-Dutch border.
During floods, the HMZ internet site publishes hourly updated water levels from Rheinfelden to Emmerich, water level forecasts and estimates up-dated every 3 hours for the section Maxau to Emmerich and at least one review of the situation per day. Furthermore, a representation of the flood development during the past seven days at all gauging stations and a review of past flood events is published. Websites of the flood warning centres Moselle and Nahe-Lahn-Sieg publish corresponding information for the Rhine tributaries.
During periods without floods, 24-hour forecasts and estimates for the 48 hours to come are published for all gauges. An early flood warning for catchments < 500 km² in Rhineland-Palatinate is updated at least twice daily and completes the weather forecast of Germany's National Meteorological Service (DWD). The early warning classifications include indications on the return period of the expected flood peaks and information on the warning situation. The warning regions correspond to rural and urban districts.
For further information please consult the homepage of the flood warning service: www.hochwasser-rlp.de