Report on the methodology for ex-port evaluation of measures and instruments

Design, implementation and operation of measures and instruments for effective and sustainable flood risk reduction require knowledge from previous practice. Systematic ex-post evaluation of interventions into the flood risk system and is an important basis for learning in support of future development of strategies and strategic options in flood risk management. Lacking methodological approaches currently prevent from comprehensive ex-post evaluation. As an effect, these remain uncommon, irregular and unsystematic. The report drafts a \u93Methodology for ex-post evaluation of pre-flood measures and instruments\u94 (ex-post EFM) for the investigation of (side-)effects, effectiveness, efficiency, robustness and flexibility of physical measures and policy instruments. The methodology aims at providing a framework for the evaluation of measures and instruments after their implementation. The framework is laid out to be generically applicable with all measures and instruments at project level. By applying the methodology, information about existing measures and instruments shall be made available for the planning of future flood risk reduction. The Methodology addresses pre-flood and flood event measures and instruments at project level aimed at the reduction of flood risk respectively flood damage. Interventions in all elements of the Source-Pathway-Receptor-Consequences model are considers. Interventions of interest for ex-post evaluation are single measures and instruments or strongly connected combinations of those seen in the context of selected natural and societal conditions.Floodsit