INFFEWS Benefit-Cost Analysis Tool Guidelines (2020) provides a practical framework for evaluating water infrastructure and flood risk management projects using standardized economic appraisal methods. The guidelines introduce a digital tool that helps quantify project costs, benefits, and net social value over the lifecycle of interventions.
The framework emphasizes identifying all relevant impacts, including direct financial costs, avoided damages, environmental and social benefits, and improvements in water security or resilience. It incorporates techniques for discounting future flows, performing sensitivity analysis, and addressing uncertainty in climate, hydrology, and socio-economic scenarios.
Overall, the guidelines enable consistent, transparent, and evidence-based decision-making, allowing policymakers and practitioners to prioritize water and flood management investments that deliver maximum net social benefits while ensuring sustainability and resilience.
