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Optimizing coastal protection: nature-based engineering for longitudinal drift reversal and erosion reduction

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Resumo:Traditional hard engineering solutions have shown weaknesses in mitigating erosion processes in vulnerable coastal areas, contributing in some cases to their aggravation, which makes it necessary to study innovative nature-based engineering solutions to address these processes. This research deals with an in-depth analysis of hydro-morphodynamic modelling results for optimizing the geometry of maritime structures under longitudinal drift reversal conditions by mimicking and manipulating natural processes to promote wave energy dissipation and sediment retention through wave deformation due to obstacle interposition. The solutions draw inspiration from the full-scale observation data of two examples of longitudinal drift reversal considering the geometric jetty characteristics in Leixões harbour and the sedimentary conditions near the Cávado estuary. Additionally, numerical simulations for predicting wave climate near the Iberian Peninsula shoreline under different scenarios were developed. Hydrodynamics and morphodynamics modelling results are discussed based on the impact of a specific storm, considering different characteristics of protection structures, followed by a parametric analysis and comparative studies performed with an optimized solution. Results indicated that near shoreline, this solution contributed to sediment accumulation downdrift, as there is no interruption of the longitudinal drift compared to traditional protection structures. Furthermore, there is a positive effect to help promoting biodiversity whenever the structure is located in an intertidal zone. Despite the enormous computational effort required in the hydromorphodynamic modelling process, this study shows that it is possible to create innovative engineering coastal solutions to induce longitudinal drift reversal and reduce erosion near the shoreline.
Autores principais:Vieira, Bárbara Filipa Vasquez
Outros Autores:Pinho, José L. S.; Barros, Joaquim A. O.; Carmo, José Antunes do
Assunto:Coastal erosion protection Hydro-morphodynamics modelling Innovative engineering solutions Longitudinal drift reversing Sediment transport Engenharia e Tecnologia::Engenharia Civil
Ano:2023
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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