Non Structural Measures (NSMs) can be considered as a set of mitigation and/or adaptation measures that do not make use of traditional structural flood defence measures. They reduce damage without influencing the current of the flood event. Non-structural flood management measures include all flood management measures that are not based on large-scale defences.
NSMs are part of an integrated approach to risk management in the EU sense that addresses all components of the Source-Pathway-Receptor-Consequence model.
These measures encompasses:
information, education and communication tools (flood maps, public presentations, collaborative platforms etc.)
spatial planning (flood risk adapted landuse)
building regulation and improvement of building flood resistance (wet-proofing and dry-proofing)
flood action plans at a local scale (infrastructure maintenance)
financial preparedness (insurance of residual risk and reserve funds)
emergency response (evacuation and rescue plans, forecasting and warning services)
recovery measures (disaster recovery plans, financial provisions of government).
NSMs can be divided into two broad categories that correspond to different types of opportunities and assessment problems: