Integrated Methodology for Physical and Economic Assessment of Coastal Interventions Impacts

Due to economic, environmental, and social interest of coastal areas, together with their erosion problems, different management strategies can be considered, physical (shoreline evolution) economic (net present value, ratio benefit-cost, break-even point) consequences impacts. Therefore, this work presents an integrated methodology that aims compare discuss the most promising intervention scenarios mitigate problems climate change effects, considering costs benefits related each intervention. The proposed takes a step forward in assessing mitigation strategies, incorporating three well-defined sequential stages: shoreline evolution medium-term perspective; structures pre-design; cost-benefit assessment. To show relevance methodology, hypothetic case study several were assessed. In order costal two situations analyzed: reference scenario scenarios. 34 evaluated verified. Depending on parameter considered (reduce protect full extension urban waterfronts, improve performance by increasing net benefit-cost or decreasing time), best results are obtained for definition option is complex depends main goal defined conclusion, analysis demanded it allows choosing better options future interventions, helping decision-making processes management.