Artigos de Revista
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Energy rate balance applied to coastal engineering problems by using RANS-VoF models in numerical wave flumes 
Nowadays, the use of RANS-based models for simulating numerical wave flumes and studying coastal engineering structures is common and allows investigating accurately phenomena that occur in current/wavestructure interactions. Comprehension of energy transformations in these processes can support designers tooptimize the system. In this study, a methodology to evaluate the terms of the energy rate balance in coastalengineering problems is developed. The methodology is applied to the propagation of regular waves in numericalwave flumes, onshore oscillating water column wave energy converter integrated into a vertical breakwater, andtwo types of rubble-mound breakwaters. The direct determination of the energy rate due to viscous and urbulencelosses and the porous resistance in rubble-mound breakwaters are carried out by time integration insidethe computational domain. Besides, the reflected and transmitted energy rates in the flume are calculated bymeans of this methodology, instead of the standard gauge methods, commonly used in physical and numericalflumes. Complementary, studies may be carried out for random incident waves and the methodology can beapplied to 3D wave tanks.
Ano: 2025
Autor(es): Teixeira, P.; Didier, E.
Revista: Ocean Engineering
Editor: Elsevier
Keywords: Rubble-mound breakwater; Oscillating water column wave energy converter; Energy rate balance; Coastal engineering; Numerical wave flume; RANS models
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An assessment of 3D scanning methods in physical models
The evaluation of damage progression caused by wave action on physical models of rubble-mound breakwaters can be accomplished through two types of methods: quantifying the movements and falls of the resistant armor elements by visual inspection (the traditional, classical method) or determining the eroded volumes and depths between consecutive surveys of armor layers using sensors and photogrammetric methods (3D scanning methods). Of the latter, one may use techniques such as the so-called "Kinect", "Photogrammetry" and "LiDAR". The end-product of these techniques is, among others, point clouds, which allow obtaining three-dimensional surface models. In this paper, four of the latter techniques (3D scanning methods) are briefly described, and a comparison is made between them regarding their usability in current tests, their advantages and disadvantages, among themselves for a study case of the physical 3D model of the Ericeira breakwater. In evaluating survey quality across the four methods, RMSE (root mean square error) was employed to align obtained point clouds with ground control points (GCP). Notably, Photogrammetry, Kinect, and Azure techniques showed excellent RMSE values. Conversely, the LiDAR-derived-method cloud, using a smartphone with LiDAR sensor and 3dScanner app, fails to yield acceptable and accurate results for the research objectives of this paper.
Ano: 2024
Autor(es): Capitão, R.; Lemos, R.; Fortes, C. J. E. M.; Jónatas, R.
Editor: COSE
Keywords: 3D scans; Reconstruction Techniques; Damage Progression; Breakwater; Physical Modelling
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Analytical and numerical modelling of wave dissipation over rigid and flexible vegetation in a flume: Drag coefficient calibration
Data of wave dissipation over vegetation fields was collected from laboratory flume experiments, fordifferent vegetation and wave conditions. An analytical model and a numerical model are applied to estimatethe wave dissipation obtained in the experiments, through the calibration of the bulk drag coefficient (CD).Results and conclusions will analyse and compare each model behaviour and obtained CD values.
Ano: 2024
Autor(es): Reis, R.; Fortes, C. J. E. M.; Suzuki , T.
Editor: IARH EUROPE CONGRESS
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Deep Neural Network Enhanced Early Warning System for Ports Operations
Downtime of port terminals results in large economic losses and has a major impact on the overallcompetitiveness of ports. EarlyWarning Systems (EWS) are an effective tool to reduce ports
Ano: 2024
Autor(es): Pinheiro, L.; Fortes, C. J. E. M.; Gomes, A.
Editor: IARH EUROPE CONGRESS
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Development of a Bayesian network-based early warning system for storm-driven coastal erosion
Coastal hazards such as flooding and erosion can cause large economic and human losses. Under this threat, early warning systems can be very cost-effective solutions for disaster preparation. The goal of this study was to develop, test, and implement an operational coastal erosion early warning system supported by a particular method of machine learning. Thus, the system combines Bayesian Networks, and state-of-the-art numerical models, such as XBeach and SWAN, to predict storm erosion impacts in urbanized areas. This system was developed in two phases. In the development phase, all information required to apply the machine learning method was generated including the definition of hundreds of oceanic synthetic storms, modeling of the erosion caused by these storms, and characterization of the impact levels according to a newly defined eerosion iimpact index. This adimensional index relates the distance from the edge of the dune/beach scarp to buildings and the height of that scarp. Finally, a Bayesian Network that acted as a surrogate of the previously generated information was built. After the training of the network, the conditional probability tables were created. These tables constituted the ground knowledge to make the predictions in the second phase. This methodology was validated (1) by comparing 6-h predictions obtained with the Bayesian Network and with process-based models, the latest considered as the benchmark, and (2) by assessing the predictive skills of the Bayesian Network through the unbiased iterative k-fold cross-validation procedure. Regarding the first comparison, the analysis considered the entire duration of three large storms whose return periods were 10, 16, and 25 years, and it was observed that the Bayesian Network correctly predicted between 64% and 72% of the impacts during the course of the storms, depending on the area analyzed. Importantly, this method was also able to identify when the hazardous conditions disappeared after predicting potential consequences. Regarding the Regarding the second validation approach, second validation approach, the k-fold cross-validation procedure was applied to the peak of a set of varying storms and it demonstrated that the predictive skills were maximized (63%
Ano: 2024
Número Páginas:
1-15pp.
Autor(es): Garzon, J.L.; Ferreira, Ó.; PLOMARITIS, T.A.; Zózimo, A. C.; Fortes, C. J. E. M.; Pinheiro, L.
Revista: Coastal Engineering
Editor: Elsevier
Volume:
Vol 189 (104460).
Keywords: HIDRALERTA; Sandy beaches; Bayesian networks; Numerical modeling; Prediction system
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Development of a Bayesian network-based early warning system for storm-driven coastal erosion
Coastal hazards such as flooding and erosion can cause large economic and human losses. Under this threat, early warning systems can be very cost-effective solutions for disaster preparation. The goal of this study was todevelop, test, and implement an operational coastal erosion early warning system supported by a particularmethod of machine learning. Thus, the system combines Bayesian Networks, and state-of-the-art numericalmodels, such as XBeach and SWAN, to predict storm erosion impacts in urbanized areas. This system wasdeveloped in two phases. In the development phase, all information required to apply the machine learningmethod was generated including the definition of hundreds of oceanic synthetic storms, modeling of the erosioncaused by these storms, and characterization of the impact levels according to a newly defined eerosion iimpactindex. This adimensional index relates the distance from the edge of the dune/beach scarp to buildings and theheight of that scarp. Finally, a Bayesian Network that acted as a surrogate of the previously generated informationwas built. After the training of the network, the conditional probability tables were created. These tablesconstituted the ground knowledge to make the predictions in the second phase. This methodology was validated(1) by comparing 6-h predictions obtained with the Bayesian Network and with process-based models, the latestconsidered as the benchmark, and (2) by assessing the predictive skills of the Bayesian Network through theunbiased iterative k-fold cross-validation procedure. Regarding the first comparison, the analysis considered theentire duration of three large storms whose return periods were 10, 16, and 25 years, and it was observed that theBayesian Network correctly predicted between 64% and 72% of the impacts during the course of the storms,depending on the area analyzed. Importantly, this method was also able to identify when the hazardous conditionsdisappeared after predicting potential consequences. Regarding the Regarding the second validationapproach, second validation approach, the k-fold cross-validation procedure was applied to the peak of a set ofvarying storms and it demonstrated that the predictive skills were maximized (63%
Ano: 2024
Autor(es): Garzon, J.L.; Ferreira, O.; PLOMARITIS, T.A.; Zózimo, A. C.; Fortes, C. J. E. M.; Pinheiro, L.
Revista: Coastal Engineering
Editor: Elsevier
Volume:
189 (2024) 104460.
Keywords: HIDRALERTA; Sandy beaches; Bayesian networks; Numerical modeling; Prediction system
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Experimental investigation of wave severity and mooring pretension on the operability of a moored tanker in a port terminal
This paper investigates the influence of sea severity and mooring line pretension configuration on the operabilityof a moored vessel at a modified berthing site inside a port. A physical model was constructed to replicate thenew layout of the port of Leix
Ano: 2024
Autor(es): Abdelwahab, H.S.; Pinheiro, L.; Santos, J. A.; Fortes, C. J. E. M.; Guedes Soares, C.
Revista: Ocean Engineering
Editor: Elsevier
Volume:
291 (2024) 116243.
Keywords: Mooring pretension; Moored ship; Ship motions; Port downtime; Ship operability; Physical modelling
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Experimental study of an onshore dual chamber oscillating water column device
A wave flume is used to study a scaled model of a stepped bottom dual-chamber Oscillating Water Column (OWC) installed onshore. Compared to traditional single-chamber OWCs, the use of dual-chambers is expected to widen the range of sea states in which the OWC is more efficient, and the step, in front of the first chamber, boosts the capturing energy capacity of the device. The Power Take-Off (PTO) system is modelled as an air opening in the pneumatic chambers. Several experiments combining regular incident waves and PTO damping conditions are performed. Results of the amplitudes of the free surface elevations inside the chambers show that the device can amplify the incident wave amplitude up to 1.57 times in chamber 2. Results of the primary efficiency show that the device is highly dependent on the PTO damping characteristics and can reach around 40% for a wide range of wave periods. Results of the reflection analysis show that the reflection coefficient is also dependent on the PTO damping characteristics but remain lower than 0.6 for all the studied cases. Sloshing phenomenon (mostly in the cross-section direction) was observed for a wavelength close to the cross-section dimension, impacting negatively on the device pneumatic performance.
Ano: 2024
Número Páginas:
16p..
Autor(es): Gadelho, J.; REZANEJAD, K.; Guedes Soares, C.; Santos, J. A.; Anastas, G.; Fortes, C. J. E. M.
Revista: Ocean Engineering
Editor: Elsevier
Volume:
Volume 300 (117240).
Keywords: Reflection coefficients; Efficiency improvement; Breakwater; Experiments; Oscillating water column
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Experimental study on drag coefficient of flexible vegetation under non-breaking waves
Laboratory experiments of wave propagation over rigid and flexible vegetation fields, with the same configurations, were conducted to understand the effect of vegetation flexibility on the drag coefficient (CD). The direct method and the least squares method (LSM), based on force and flow measurements, are applied to calculate the CD in the experimental conditions. The formulations of both methods are extended to estimate the CD for flexible vegetation cases. A video analysis was performed to account for the swaying motion. Typically, wave dissipation is lower for flexible than for rigid vegetation of the same configuration, under the same flow condition. Therefore, a proportional effect in the corresponding CD results, obtained from common CD calibration to wave dissipation without considering vegetation motion, is usually observed. However, the present results show that although the wave dissipation was 34% lower for flexible relative to rigid vegetation, the respective CD values were close. CD estimations considering vegetation motion and inertia suggest that CD of flexible vegetation was up to 13% higher relative to rigid vegetation. Accounting for inertia reduced the CD for rigid vegetation up to 7%, while raised the CD for flexible vegetation up to 13%.
Ano: 2024
Número Páginas:
14p..
Autor(es): Reis, R.; Fortes, C. J. E. M.; Rodrigues, J.; HU, Z.; Suzuki , T.
Revista: Ocean Engineering
Editor: Elsevier
Volume:
Volume 296.
Keywords: Wave dissipation; Inertia; Vegetation motion; Flexible vegetation; Drag coefficient
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Exploring Wave
Aquatic vegetation in the littoral zone plays a crucial role in attenuating wave energy andprotecting coastal communities from hazardous events. This study contributes to the developmentof numerical models aimed at designing nature-based coastal defense systems. Specifically, a novelnumerical application for simulating wave
Ano: 2024
Autor(es): El Rahi, J.; Martinez-Estevez, I.; Reis, R.; Tagliafierro, B.; Dominguez, J.M.; Crespo, A.J.C.; Stratigaki, V.; Suzuki, T.; Troch, P.
Editor: MDPI
Keywords: Project chrono; DualSPHysics; SPH-FEA coupling; Fluid
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Comunicações
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Aplicação de um método Lagrangiano para a modelação de escoamento com superfície livre e de interacção onda-estrutura costeira
Diferentes modelos e métodos foram desenvolvidos, tendo como base a abordagem Lagrangiana, e sãogeralmente conhecidos genericamente como modelos SPH (Smoothed Particle Hydrodynamics). Neste artigoapresentam-se as potencialidades de um método Lagrangiano na modelação de escoamentos com superfícielivre, o modelo SPHysics, através da sua aplicação a diferentes casos de interacção entre ondas e estruturascosteiras.
Ano: 2009
Número Páginas:
10p.
Autor(es): Didier, E.; Neves, M. G.
Keywords: Estruturas marítimas; Smoothed particle hydrodynamics; Método lagrangiano; Cfd
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Coastal flow simulation using SPH: Wave overtopping on an impermeable coastal structure
Wave overtopping is a violent natural event thatinvolves highly complex phenomenon such as large deformationof free surface, turbulence and eddy vortices, strong interactionbetween the wave and the structure. Models based on SmoothedParticle Hydrodynamics (SPH), that used a mesh-free technique,are an option to address wave overtopping and other phenomenainvolved on the interaction between waves and coastal structures.In the present paper, SPHysics model is validated and applied forwave propagation and wave overtopping of an impermeableseawall. Validation and convergence study is carried outconsidering several parameters such as the initial particle densityand the eXSPH parameter. Free surface elevation in several gaugesand overtopping discharge over the structure are analyzed andcompared to experimental data and other numerical results. Avery satisfactory agreement is obtained with experimentalmeasurements. Finally, the numerical model is applied formodelling wave propagation with breaking and overtopping ofan impermeable sea wall coastal defence structure, a commonstructure employed at the Portuguese coast. Numerical resultsare compared with experimental data from model scale testscarried at the National Civil Engineering Laboratory (LNEC).Good agreement is obtained for both free surface elevation andovertopping discharge over the structure.
Ano: 2009
Número Páginas:
8p.
Autor(es): Didier, E.; Neves, M. G.
Keywords: Numerical models; Coulwave; Wave overtopping
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Colmatação de falhas em dados de agitação marítima. O caso de Faro.
Considera-se um conjunto de 10 anos de dados de parâmetros de agitação marítima provenientes da bóia de Faro, do Instituto Hidrográfico. Mau grado, esta colecção apresenta um razoável número de falhas ao longo desses dez anos, com variadas extensões, que se pretendem colmatar. Adoptaram-se duas formas distintas de tratamento do problema, uma mediante utilização de uma metodologia de colmatação com base em valores adjacentes dasérie existente (pequenas falhas), e outra mediante substituição dos valores em falta com observações colhidas em bóia-ondógrafo próxima (bóia-ondógrafo de Cádiz, dos Puertos del Estado, à cota -450 m Z.H.), após adequada validação dessas observações.Nesta comunicação dá-se conta da análise e processamento das séries temporais iniciais edescrevem-se os métodos utilizados para a colmatação dos registos em falha. Assim, faz-se uma descrição estatística dos dados brutos, constituída pelas séries temporais e histogramas dos parâmetros mais relevantes, procede-se à identificação dos registos em falha e descrevem-se e comparam-se métodos de colmatação de falhas das séries temporais.Para o presente conjunto de dados, conclui-se que a metodologia mais apropriada para acolmatação de falhas superiores a um dia é a que resulta da utilização de dados de uma bóia próxima.
Ano: 2009
Número Páginas:
12p.
Autor(es): Capitão, R.; Sancho, F. E.; Alenquer, N.; Proença, B.
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Desenvolvimento do modelo numérico AMAZON para o cálculo do galgamento de estruturas marítimas porosas
N/A
Ano: 2009
Número Páginas:
formato electrónico.
Autor(es): Reis, M. T.; Neves, M. G.; Silva, L. G.
Keywords: Cálculo do galgamento; Modelos numéricos; Amazon
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Estudio de la solución para la mejoría de la reflexión en el interior del puerto de Vila do Porto, Azores
En esta ponencia se ha presentado la solución de proyecto para la corrección delmuelle de atraque de los ferries del puerto de Vila do Porto. La estructura, que tienecomo principal objetivo disminuir la agitación y el rebase en la dársena sin ocupardemasiado espacio, está compuesta de una plataforma horizontal asentada enpilares rectangulares por encima de un talud de escollera. Se presentan los resultadosde ensayos en modelo físico 3D y los obtenidos con dos modelos numéricos RANS en lo que se refiere a presiones en la plataforma y reducción de la reflexión: el modeloCOBRAS-UC y el FLUENT.El modelado físico permitió verificar el comportamiento de la estructura: la agitación yel rebase son ahora menores en toda la dársena, o sea, entre el muelle comercial y lazona de atraque del Ferry, y las presiones máximas y la estabilidad han sidoverificadas. En cuanto al modelado numérico, el modelo FLUENT (2D), que seencuentra todavía en validación para aplicaciones de estudios de interacción olaestructura,se ha comparado con los resultados del modelo COBRAS-UC y se haverificado que presenta problemas de convergencia cuando se usa un esquema deintegración en el tiempo de segundo orden y difusión numérica de la fracción devolumen cuando se usa un esquema de primer orden (aunque resuelva los problemasde divergencia). El FLUENT 3D presenta, además, un elevado tiempo de cálculo,particularmente en 3D.
Ano: 2009
Número Páginas:
11p.
Autor(es): Neves, M. G.; Didier, E.; Robert, M.; Losada, I.
Keywords: Fluent; Cobras-uc
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Estudo numérico não linear da interacção onda cilindro
Neste trabalho estuda-se a interacção de ondas regulares com cilindros verticais fixos aofundo. Na simulação numérica deste problema tridimensional viscoso e com superfície livreutiliza-se o código FLUENT que resolve as equações de Navier-Stokes em valor médio(equações de Reynolds) e utiliza uma técnica VoF (Volume of Fluid) na identificação dasuperfície livre.Apresentam-se os parâmetros relativos à discretização e valida-se o modelo numérico porcomparação com resultados analítico-experimentais e obtidos com o código WAMITamplamente validado.As diferenças entre resultados são correlacionadas com os efeitos não lineares ligados àamplitude relativa (irrotacionalidade do escoamento) e à relação entre o diâmetro do cilindro e ocomprimento da onda.
Ano: 2009
Número Páginas:
12p.
Autor(es): Gil, L.; Barreiro, T.; Didier, E.; Alves, M.
Keywords: Vof; Fluent; Interacção de ondas regulares com cilindros
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Interacção não linear de grupos de ondas curtas
Neste trabalho testa-se a capacidade do código numérico COBRAS-UC,baseado nas equação RANS e utilizando uma técnica VOF, na simulação dos efeitos nãolineares resultantes da interacção de dois grupos de ondas. O caso de teste consiste napropagação, em sentidos opostos (interacção fraca) de dois grupos de ondas emcondições de água profunda. Estudos analíticos, experimentais e numéricos anteriorespermitiram identificar a variação da velocidade de fase como a única consequência dainteracção não linear. A comparação de anteriores resultados com os obtidos no âmbitodeste trabalho permitem concluir sobre a precisão e potencialidades do códigoCOBRAS-UC na simulação de fenómenos não lineares exigentes do ponto numérico.
Ano: 2009
Número Páginas:
16p.
Autor(es): Gil, L.; Neves, M. G.; Didier, E.
Editor: Congreso de Métodos Numéricos en Ingeniería 2009
Keywords: Interacção ressonante; Efeitos não lineares; Rans vof
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Método Lagrangiano para a modelação numérica da interacção entre uma onda e uma estrutura costeira
A análise da eficiência das estruturas costeiras em termos de galgamento, é classicamenterealizada através de estudos em modelo físico. No entanto, a modelação numérica podecomplementar estes estudos experimentais.A aplicação de dois tipos de modelos numéricos na simulação do galgamento de estruturacosteiras impermeáveis, cada modelo com as suas vantagens e limitações, é analisada nesteartigo: um modelo Eulariano, COBRAS-UC, e um modelo Lagrangiano, SPHysics.Os resultados de elevação de superfície livre e de caudal médio galgado obtido pelos doismodelos são comparados com dados de ensaios obtidos em modelo físico à escala 1:10, parao estudo do galgamento numa estrutura de protecção marginal impermeável.
Ano: 2009
Número Páginas:
14p.
Autor(es): Didier, E.; Neves, M. G.
Keywords: Estruturas costeiras; Sphysics; Cobras-uc
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Metodologia de cálculo do espraiamento e inundação em zonas costeiras recorrendo ao sistema Guiomar: Aplicação à praia de Vale do Lobo
N/A
Ano: 2009
Número Páginas:
formato electrónico.
Autor(es): Raposeiro, P.; Fortes, C. J. E. M.; Reis, M. T.; Neves, D. R.; Ferreira, J.
Keywords: Loulé; Espraiamento; Risco e vulnerabilidade; Ordenamento do território; Zona costeira; Modelos numéricos; Sistemas de informação geográfica
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Numerical investigation of steady flow past an elliptic cylinder at various aspect ratios
The effect of aspect ratio on steady laminarfluid flow past an elliptical cylinder is investigatednumerically at two low Reynolds numbers, 20 and40. The two-dimensional Navier-Stokes equationsare solved using an original fully coupled resolutionmethod, without any transformation of continuityequation. The wake
Ano: 2009
Número Páginas:
8p.
Autor(es): Didier, E.
Editor: The 14th International Conference on Fluid Flow Technologies
Keywords: Fully coupled resolution method; Finite volume; Elliptic cylinder; Cfd
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Capítulos de Livros
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Multi-functional artificial reefs for coastal protection
N/A
Ano: 2009
Número Páginas:
153-210 pp.
Autor(es): Voorde, M.; Antunes do Carmo, J.; Neves, M. G.
Editor: Ch. A. Hudspeth, T. E. Reeve
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Teses de Doutoramento
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Trapped-mode propagation along irregular coasts
N/A
Ano: 1999
Número Páginas:
159 p.
Autor(es): Santos, J. A.
Editor: ******
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Probabilistic Assessment of the Safety of Coastal Structures
N/A
Ano: 1998
Número Páginas:
594 p.
Autor(es): Reis, M. T.
Editor: ******
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Unsteady Nearshore Currents on Longshore Varying Topographies
N/A
Ano: 1998
Número Páginas:
346 p.
Autor(es): Sancho, F. E.
Editor: ******
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Simulação da agitação irregular. Técnicas matemáticas
N/A
Ano: 1973
Autor(es): Carvalho, M. M.
Editor: ******
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Relatórios
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Estudo da agitação da doca de Pedrouços.
N/A
Ano: 1965
Autor(es): Vera-Cruz, D.
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Study of groyne sistems against coast erosion. Progress report until December 1964
N/A
Ano: 1965
Número Páginas:
41.
Autor(es): Barceló, J. P.
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Estudo de sistemas de esporões para combater a erosão costeira. 6º Relatório semestral Julho-Dezembro de 1963
N/A
Ano: 1964
Número Páginas:
6 pp.
Autor(es): Barceló, J. P.
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Estudo de sistemas de esporões para combater a erosão costeira. Actividade até Dezembro de 1964
N/A
Ano: 1964
Número Páginas:
42.
Autor(es): Barceló, J. P.
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Estudo em modelo das obras do porto de Leixões. Ensaios de agitação. 3º Relatório
N/A
Ano: 1964
Autor(es): Vera-Cruz, D.
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Estudo em modelo de obras do porto de Leixões. Ensaios de Agitação. 1º Relatório
N/A
Ano: 1964
Autor(es): Vera-Cruz, D.
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Estudo em modelo de obras do porto de Leixões. Ensaios de agitação. 2º Relatório
N/A
Ano: 1964
Autor(es): Vera-Cruz, D.
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Estudo hidráulico da obra marítima do aterro Glória-Botafogo. Características da agitação na enseada da Glória. Nota informativa
N/A
Ano: 1964
Autor(es): Elias, N.
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Study of groin sistems against coast erosion. 7th Semestrial report. January-June 1964
N/A
Ano: 1964
Autor(es): Barceló, J. P.
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Ensaio em modelo reduzido do porto de Angra do Heroísmo. Obra destinada a evitar as reflexões da ondulação ao longo da muralha da estrada 28 de Maio.
N/A
Ano: 1963
Autor(es): Barroco, E. M.
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Outros
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Risk Perception of Coastal Flooding in Praia da Vitória, Azores
The project LIFEGARACHICO (LIFE20 CCA/ES/001641) proposes the creation of an effective flexible adaptation framework for the coastal unicipalities of Macaronesia, making specific local interventions to increase their resilience against extreme coastal events resulting from climate change. Social surveys were applied in Praia da Vitória, Terceira, Azores, to understand the civilians perception of coastal flooding events.
Ano: 2024
Autor(es): Lima, L.; Fortes, C. J. E. M.; Zózimo, A. C.; Pinheiro, L.
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Social Surveys Indicating the Resilience of Urban Coastal Localities in Macaronesia to Coastal Flooding
The project LIFE-GARACHICO (LIFE20 CCA/ES/001641) proposes the creation of an effective flexible adaptation framework for the coastal municipalities of Macaronesia, making specific local interventions to increase their resilience against extreme coastal events resulting from climate change. Social surveys were applied in both localities in order to understand the civilians perception of coastal flooding events
Ano: 2024
Autor(es): Fortes, C. J. E. M.; Lima, L.; Zózimo, A. C.; Pinheiro, L.; Modino, R.; Barroso, J. G.; Cruz, C. G.; Comes, L.
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Avaliação da Estabilidade do Quebra-Mar Destacado do Porto Inglês (Ilha do Maio
Realização de ensaios em modelo físico reduzido 3D para a avaliação da estabilidade do quebra-mar destacado do Porto Inlgês, Maio, Cabo-Verde
Ano: 2023
Autor(es): Soares, R. E.; Fortes, C. J. E. M.; Lemos, R.; Costa, C.E.B.C.; Silva, L. G.; Pinheiro, L.; Neves, M. G.
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Physical modelling of wave-induced plant drag coefficient
N/A
Ano: 2019
Autor(es): Reis, R.; Suzuki , T.; LUBBERS, B.; Fortes, C. J. E. M.; Pires Silva, A.
Keywords: Flume experiments; Wave propagation; Plant flexibility; Vegetation
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Evaluation of wave overtopping consequences for risk assessment using ANP methodology
Adverse sea conditions can cause emergency situations associated to wave overtopping, which endanger the safety of people and goods, with negative impacts for society, the economy and the environment. Therefore, a methodology to assess the overtopping risk in port and coastal areas is essential for a proper planning and management of these areas.The Portuguese National Laboratory for Civil Engineering (LNEC) has been developing the HIDRALERTA system, an integrated decision-support tool for port and coastal management, which focus in preventing and supporting the management of emergency situations and the long-term planning of interventions in the study areas. It enables the user to calculate the risk for various port and coastal activities, starting with the characterization of sea-waves, wind field and tide levels at the study regions.HIDRALERTA was already tested at different places in Portugal: Costa da Caparica beach, in Almada, and port of Praia da Vitória, in the Azores. However, in both cases, the evaluation of wave overtopping / flooding consequences was carried out using a quite simple approach. In fact, such consequences were assessed only at a global and qualitative level, based on information provided by the responsible authorities.This paper aims at testing a quantitative methodology to evaluate overtopping consequences: the Analytic Network Process (ANP). This methodology was proposed to solve complex decision-making problems and its objective is to calculate the priorities among decision elements which will define their final weights on the consequences. The ANP approach can produce interdependencies between criteria and compute the respective weight of each criterion. Such a network model with dependence and feedback improves the priorities derived from judgements and makes prediction more accurate. So, the ANP allows comparison among clusters of elements. Furthermore, in this methodology we take into account the impacts of alternatives on the importance of criteria, by normalizing the comparison matrix. Thus, the given alternatives can influence the ranking of criteria.Application of the ANP methodology to the case study of Praia da Vitória port is presented and a consequences level map is obtained.
Ano: 2016
Autor(es): Lourenço, I.; Santos, J. A.; Fortes, C. J. E. M.; Reis, M. T. L. G. V.; Poseiro, P.; Craveiro, J.
Keywords: Praia da Vitória port; Analytic Network Process (ANP); Risk; Wave overtopping
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Sistema de alerta para a navegação em portos
Apresenta-se um novo sistema de alerta para navios amarrados em portos que se encontra em desenvolvimento no Laboratório Nacional de Engenharia Civil. O sistema SWAMS_ALERTA é um sistema de previsão e alerta baseado na avaliação do risco associado ao comportamento de navios amarrados em zonas portuárias.Os riscos associados a navios amarrados decorrem de movimentos excessivos, quer no plano horizontal, quer no plano vertical. Estes movimentos podem condicionar as atividades portuárias, nomeadamente cargas e descargas, mas em casos extremos podem levar à ocorrência de situações de emergência, tais como rotura de cabos, rotura de cabeços de amarração ou até colisões com o cais. As consequências deste tipo de situações envolvem sempre grandes prejuízos materiais e por vezes humanos.O sistema SWAMS_ALERTA utiliza as medições e previsões de agitação marítima para a determinação dos seus efeitos em termos de movimentos nos seis graus de liberdade e forças nas amarras e defensas quando o navio se encontra estacionado no cais. Para tal, o sistema recorre a uma série de modelos numéricos, interligados entre si. A comparação destes valores com valores máximos admissíveis pré-estabelecidos permite a avaliação, em tempo real, de situações de emergência e a emissão de alertas dirigidos às entidades portuárias.O sistema é constituído por 4 módulos:I
Ano: 2016
Autor(es): Pinheiro, L.; Lopes, P.; Fortes, C. J. E. M.; Santos, J. A.
Keywords: Navios amarrados; Riscos; Sistema de previsão e alerta
CONSTRUÇÃO DA EXPANSÃO DO PORTO DE SAL-REI 1ª FASE (ILHA DA BOAVISTA CABO VERDE) Ensaios bidimensionais em modelo reduzido Parecer Técnico
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Definição da Geometria para um Recife Artificial Multifuncional em Leirosa (Poster)
N/A
Ano: 2010
Número Páginas:
1.
Autor(es): Neves, M. G.; Antunes do Carmo, J.
Editor: Gestão Costeira: Vulnerabilidades e Riscos na Região Centro
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Probabilistic Assessment of Hazards from Overtopping of Seawalls in Urban Environments: Annual Report of pOST-dOCTORAL rESEARCH
N/A
Ano: 2005
Autor(es): Reis, M. T. L. G. V.
Editor: ******
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Guidelines and Recommendations for River Information Services - PIANC
N/A
Ano: 2004
Autor(es): J.A Covas
Editor: ******
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Departamento de Hidráulica e Ambiente
