Extreme floods cause enormous damage in floodplains, which levees cannot prevent. Therefore, it is vital for spatial planning to provide space for water retention in these areas. Land use planners, water management agencies, landowners, and policymakers all agree on this challenge, but attempts to make the space for rivers to provide retention are generally not very successful. Adopting an innovative interdisciplinary approach, this book examines how society can manage the use of the floodplains along rivers in the face of extreme floods, focusing in particular on the relation between social arrangements and the elemental forces of floods. The book firstly analyses why contemporary floodplain management is so often clumsy and ineffective by looking at various real-life situations in Germany, using Cultural Theory to provide a much-needed, but previously neglected social perspective. These analyses show a pattern of activity resulting from different rationalities which dominate the floodplains in different phases. During extreme floods, it is rational to manage floodplains as dangerous areas