Decision support and policy development for strengthening resilience of coastal regions is one of the main activities of PEARL, within which a shift from a reactive decision environment to an interactive one is being undertaken, on the basis of the latest thinking in flood management. Towards that aim, the PEARL Knowledge Base of resilience strategies has been developed which allows end-users to navigate from their observed problem to a selection (screening) of possible options/interventions worth considering (through modelling or other work). Assisting in the navigation from the statement of a problem towards the identification of suitable measures for more detailed examination, the PEARL Knowledge Base has been designed to target a wide audience including the scientific community, civil societies, policy makers and local government. Incorporating also into the knowledge base applications of resilience measures i.e. real case studies, modelled/simulated case studies or even prototypes/lab physical models, lessons learned will be extracted by the alternative and/or combined interventions, as well as knowledge of “suitability” of each measure (or combination of measures) per type problem, taking also into consideration restrictions which might be imposed e.g. by spatial scale or land uses of measures’ implementation.

Apart from a collection of engineering, environmental and operational strategies and solutions for adaptation and mitigation, the knowledge-base also hosts a collection of methods and tools supporting the selection of resilience strategies. Multi-objective optimization algorithms and multi-criteria decision analysis methods are available for the end users to consider, providing them at the same time with the necessary references enabling tools’ identification. Utilising the identified tools, users are qualified to examine alternative interventions options and evaluate strategies and measures alone or in combination against efficiency indicators. Encouraging stakeholders to broaden their consideration against resilience strategies and tools for their selection, the PEARL Knowledge Base concentrates and enriches possible responses that can improve strategic and operational flood risk management, especially for coastal communities, and builds towards the strengthening of risk governance and the role of various actors involved in the preparation of risk reduction plans, such as governing authorities, municipalities and local communities.