ISEP - DEC - Comunicações em eventos científicos
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- 1º Ciclo de Palestras de Engenharia CivilPublication . Departamento de Engenharia Civil; Lopes, Duarte Barroso; Fontão, Eunice VilaverdeRealizou-se o I Ciclo de Palestras no Departamento de Engenharia Civil do Instituto Superior de Engenharia do Porto, sobre os seguintes temas: Revestimentos em Edifícios - dia 17 de Outubro de 2001 Zonas Costeiras - dia 14 de Novembro de 2001 Betão Reforçado com Fibras - dia 12 de Dezembro de 201 De que resultaram os textos das comunicações agora compilados. Na escolha dos temas considerou-se a sua actualidade e o facto de completarem os assuntos das aulas do curso de Engenharia Civil. No futuro prevê-se a realização de novos ciclos com temas diversos proporcionando a divulgação de conhecimentos e criando um espaço de diálogo com técnicos e investigadores. Não deve deixar de se referir, que estas palestras reflectem o empenho de docentes do DEC na actualização de conhecimentos em áreas científicas de elevado potencial e interesse para uma escola de engenharia de grandes tradições.
- Morphodynamics of an Embayed Beach in Majorca IslandPublication . Abreu, Tiago; Parreño-Mas, Benjamín; Pinto-Faria, JoséCala Millor Beach is located in Mallorca Island and is a small sandy beach, embedded in a rocky bay. It remained generally in a state of equilibrium but, in the 60s, the urbanistic area began to develop towards the beach, interfering with the natural sediment transport of the bay. The seabed is covered by native vegetation known as Posidonia Oceanica, playing an important role in the morphodynamic system. This vegetation is responsible for the lamination of the waves through energy dissipation. To characterize the local dynamics, the SMC program (System of Coastal Modelling) is employed to study sediment transport trends and to evaluate morphological evolutions in the short term. The results seem to support the observed problem, resulting from an imbalance of sediment transport due to the drift from north to south. Moreover, the results support the idea that the morphological variations can be significantly attenuated in the presence of Posidonia Oceanica. This is of great importance for coastal management since the influence of the vegetation can be assessed, improving our knowledge on the coastal morphology and enabling to identify ways to protect the beach.
- Analysis of Nonlinear Wave Parameters on Ofir Sandy Beach (NW Portugal)Publication . Abreu, Tiago; Silva, Paulo A.; Baptista, Paulo; Pais-Barbosa, Joaquim; Fernández-Fernández, Sandra; Ferreira, Caroline; Matos, JoãoThe characterization of wave transformation processes in the nearshore is of paramount importance when it comes to assessing storm and flooding impacts, sediment transportation and deposition, harbors safety or design of coastal protective structures. This study analyzes nonlinear wave parameters on Ofir sandy beach. This beach is located along the northwest Portuguese coast which is a highly energetic coast exposed to waves generated far away in the Atlantic Ocean. Despite the existence of rocky outcrops in the nearshore and intertidal zones at the study site, reducing the wave energy that reaches the beach, the study site exhibits pronounced erosive processes. Field observations of six near-bottom pressure records collected at the intertidal zone help to characterize the evolution of wave nonlinearities which are directly associated with sediment transport mechanisms. Data results show that there is an interrelation between the characteristics of the waves and the local morphology. It is also possible to ascertain, more clearly, the level of asymmetry present in the waves propagated at different depths, contributing to a better understanding of the local morpho-hydrodynamics.
- Geotechnical Hazards in Rocky Slopes (Northern Portugal): Focused on MethodologyPublication . Trigo, José Filinto; Pacheco, Carlos; Fernandes, João; Ferraz, Pedro; Sousa, Jorge; Machado, Rui; Duarte, Sara; Mendes, Ana; Freitas, Liliana; Teixeira, José; Ramos, Luís; Afonso, Maria José; Chaminé, Helder I.Interdisciplinary studies of rocky slopes stability have been performed on Northern Portugal, that allowed to establish a design methodology. This approach carries together the use of more traditional techniques, with the application of more recent technologies, such as unmanned aerial vehicles. This work presents a set of procedures that have been applied successfully in several case studies, describing the different stages, with an emphasis on the production of a ground three-dimensional model. This model is generated from photographs obtained with successive drone flights, with overlapping. It is the support for the development of subsequent stages, especially for the characterisation of the trajectories of rockfalls and modelling, the development of susceptibility mapping and of rock slope hazard. In this context, the Natural Slope Quality Index (N-SQI ), an adaptation of the Slope Quality Index (SQI), orientated to natural slopes, is presented. The Block Gravity Number (BGN), created in order to hierarchise rock blocks, selecting them for modelling, is also proposed.