Assessment of green measures as coastal defences using numerical models

摘要: Climate change may reduce the performance and design life of “grey” coastal engineering interventions. Green solutions can be combined with present infrastructures providing extra flexibility to adapt our beaches affordable costs. This paper assesses behaviour a typology green (seagrass meadows) via numerical hydro-morphodynamic modelling for an erosive beach prone episodic flooding, under typical Mediterranean conditions. A multivariate method jointly assessing flooding erosion copulas is proposed developed. In considered pilot site, different layouts have been tested by analysing their efficiency limits. It concluded that, moderate SLR rates (RCP 4.5. central trend), these measures could attenuate efficiently expected changes in marine drivers. However, complexity eco-hydraulic interactions on which Nature Based Solutions depend would demand periodic monitoring evaluation maintaining acceptable risk levels, especially case high-end scenarios.