Publicação
Innovative nature-based structures for coastal erosion protection
| Resumo: | This research work presents nature-based innovative structures for addressing coastal erosion mitigation, based on the observation of alongshore drift reversal phenomena. Hydro-morphodynamics and wave climate predictions for storm conditions near the Iberian Peninsula shoreline were analysed for defining an optimized maritime structure geometry. Full-scale observation data and numerical modelling using Delft3D, SWAN and XBeach were applied to optimize the geometry of maritime structures. Based on observation of the natural longitudinal drift reversal process, the shape and dimensions of a new structure were defined towards minimizing local erosion problems promoting wave energy dissipation and sediments retention. Additionally, the thermo-mechanical behaviour of innovative armour units composed of recycled steel fibre reinforced concrete (RSFRC) was analysed. The preliminary design and the thermo-mechanical analysis were performed by applying FEMIX software to simulate the concrete maturity, creep, shrinkage and cracking in order to evaluate the cracking risk formation during production of such large elements. Findings indicate that the proposed structure can contribute to the accumulation of sediments downdrift without interrupting longitudinal drift and that the intertidal structure location can create ways to promote biodiversity within the structure, taking into account its special geometric characteristics. Results also demonstrate that RSFRC can significantly increase the armour units’ life cycle by maintaining low crack widths without compromising their functionality. With these innovative approaches, it is possible to create effective and sustainable coastal protection structures, highlighting the beneficial effect of nature based-solutions in promoting wave energy dissipation, sediments retention, biodiversity, and environmental benefits through the use of recycled materials. |
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| Autores principais: | Vieira, Bárbara Filipa Vasquez |
| Outros Autores: | Pinho, José L. S.; Barros, Joaquim A. O.; Ventura-Gouveia, A. |
| Assunto: | Innovative nature-based coastal protection structures hydro-morphodynamics modelling thermo-mechanics modelling longitudinal drift reversal recycled steel fibre reinforced concrete |
| Ano: | 2023 |
| País: | Portugal |
| Tipo de documento: | outro |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | This research work presents nature-based innovative structures for addressing coastal erosion mitigation, based on the observation of alongshore drift reversal phenomena. Hydro-morphodynamics and wave climate predictions for storm conditions near the Iberian Peninsula shoreline were analysed for defining an optimized maritime structure geometry. Full-scale observation data and numerical modelling using Delft3D, SWAN and XBeach were applied to optimize the geometry of maritime structures. Based on observation of the natural longitudinal drift reversal process, the shape and dimensions of a new structure were defined towards minimizing local erosion problems promoting wave energy dissipation and sediments retention. Additionally, the thermo-mechanical behaviour of innovative armour units composed of recycled steel fibre reinforced concrete (RSFRC) was analysed. The preliminary design and the thermo-mechanical analysis were performed by applying FEMIX software to simulate the concrete maturity, creep, shrinkage and cracking in order to evaluate the cracking risk formation during production of such large elements. Findings indicate that the proposed structure can contribute to the accumulation of sediments downdrift without interrupting longitudinal drift and that the intertidal structure location can create ways to promote biodiversity within the structure, taking into account its special geometric characteristics. Results also demonstrate that RSFRC can significantly increase the armour units’ life cycle by maintaining low crack widths without compromising their functionality. With these innovative approaches, it is possible to create effective and sustainable coastal protection structures, highlighting the beneficial effect of nature based-solutions in promoting wave energy dissipation, sediments retention, biodiversity, and environmental benefits through the use of recycled materials. |
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