Abstract
This paper presents the results of a case study in which a simple one‐dimensional lumped hydro‐ecological model, OxbowSim, is developed in order to predict the hydro logical, nutrient and ecological impact of different management scenarios on a floodplain oxbow in the River Tisza basin, Hungary. The impact of the various lake managements on the value of the Tisza oxbows as local fisheries, areas of biodiversity, possible flood retention reservoirs and their threat from pollution incidents in the River Tisza is considered. This case study also highlights the problems of limited data availability and lack of shallow lake research in this region especially now that EU environmental legislation, such as the Water Framework Directive 2000/60/EC, has to be met.