Rhine Warning and Alarm Plan After the chemical accident at Sandoz in 1986, the ICPR strengthenedits international Warning and Alarm Plan (WAP). If, despite allpreventive measures, an accident occurs or great amounts ofhazardous substances flow into the Rhine that may detrimentallyimpact the water quality or drinking water supply along the river, themodel-based WAP is activated, which above all warns all usersdownstream. Apart from warnings, which are only issued by theInternational Main Alert Centres (IAC) during huge and serious waterpollution events, the WAP is increasingly used as an instrument forexchanging reliable information on sudden water pollution measuredby monitoring stations along the Rhine, Neckar and Main rivers and smaller tributaries. The warningsand information issued every year are compiled in an annual report available on the ICPR website. # Transboundary Information systems related to flood risk managementThe “Rhine Atlas”is a supra-national sensitization tool comprising aggregated flood hazard and riskmaps of the countries on the river. For the main stream of the Rhine, flood depth and areas as well asobjects at risk are shown for three scenarios (high, medium and low flood probability). Additionalinformation and more detailed national maps are available by clicking on any area of the atlas. TheRhine Atlas, which is available on the ICPR website, raises risk awareness, supports theimplementation of preventive measures in flood-prone areas, and represents a database for riskcalculations (see below, the tool ICPR FloRiAn). # Flood forecasting and flood announcement contribute to reducing damage in case of a flood event.Therefore, the Rhine countries – through national centres along the river - cooperate at internationallevel when exchanging data on discharge and precipitation and using them for flood forecasting. Thequality of information and forecasting is continuously being improved. Today, national mobileapplications like “Meine Pegel” (my gauges) disseminate information and warnings on water levels.# Instrument for assessing the impact of flood risk management measures on risk evolution:The ICPR,supported by the engineering consultant HKV, developed the GIS instrument “ICPR FloRiAn (FloodRisk Analysis)”. Its purpose is to evaluate the effect of measures to reduce flood risk and estimate thefuture evolution of flood risk. Flood maps (e.g. developed under the FD) are the basis for the tool. Inaddition to the quantification of economic flood risk, modules are developed for quantifying theconsequences of risks for human health, the environment and cultural heritage. In short, the maininstrument consists of three interacting calculation modules resulting in an overall damage or riskassessment. The ICPR uses this tool to assess risk reduction and evolution along the Rhine takinginto account the impacts of measures. The instrument is available on demand from the ICPR and isapplicable to other river basins.