Since the flood in 2002 (above all on the Danube) some measurements in the field of flood risk management were taken in Austria. Evaluation, research and planning as well as legal restructuring are intended to reduce the risk and thus the damage effects of future floods, as stipulated in the EU Flood Directive. After rehabilitation of existing or implementing new protective measures, the affected population usually thinks it is safe. A weakened flood protection measure is only a risk minimization and no elimination. Remaining risk, so-called residual risk, is often excluded. Not least by the flood risk management plan published in 2016, the issue of residual risk was given more attention. The aim of this thesis is to assess the state of the residual risks of flood protection measures in Austria from a spatial planning perspective and to make professional recommendations. The Marchfeld region as a practical example contributes by means of a spatial analysis to the knowledge acquisition.