flood complexity (IMAGE) Helmholtz Centre for Environmental Research - UFZ Caption The interaction of several factors plays an important role in the development of floods. If in a catchment floods are more extreme the more variables are involved, then this catchment has a high flood complexity. In Germany, the upper reaches of the Elbe, the Saale and the Moselle are examples of catchments with a high flood complexity. In contrast, the Havel and the Zusam (a tributary of the Danube) are examples of catchments with a low flood complexity. Credit UFZ Usage Restrictions none License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.