Changes in water quality and ecological status are considered likely, but have not been investigated. Current practical information needs — as demonstrated by the case of the Tisza — include the quantification of the predicted impacts on water resources and a better knowledge about their spatial distribution. A number of research projects, funded in particular by the EU, aim at strengthening the knowledge base. The necessity of strengthening interdisciplinary research of climate change impacts on water-related sectors of the economy requires coordination between different sectors and agencies.