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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Resolution refinement technique in a smoothed particle hydrodynamics numerical flume for coastal engineering applications
Numerical modeling of the wave interaction with coastal structures is a challengingissue due to the multi-nonlinear phenomena involved, such as, wave propagation, wavetransformation, interaction among incident and reflected waves, run-up / run-down, wavebreaking and wave overtopping. Numerical models based on a Lagrangian formulation, likeSPH (Smoothed Particle Hydrodynamics), allow simulating complex free surface flows. Thiswork presents the new developments on a SPH numerical model for studies on wave-structureinteraction made at the National Civil Engineering Laboratory (LNEC). A new semiautomaticrefinement technique of particles was applied to reduce the CPU time. Simulationswith a specific geometry, a wave flume with a water chamber, were made regarding theapplication of this technique. An analysis was made on (i) convergence with resolution, i.e.particle dimension and (ii) semi-automatic refinement. Results were compared with thesolution obtained with the finer resolution.
Ano: 2013
Número Páginas:
12p.
Autor(es): Neves, D. R.; Didier, E.; Teixeira, P.; Neves, M. G.
Keywords: Maritime structures; Refinement technique; Wave-structure interaction; Sph
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Simulação numerica de propagação de ondas geradas por embarcações sobre um fundo inclinado
Esta comunicação apresenta os resultados da introdução no modelo numérico FUNWAVE deduas distribuições de pressão existentes na literatura para simular a propagação de ondasgeradas por embarcações em regiões de batimetria variável.O modelo FUNWAVE foi adaptado por Nascimento (2007) de forma a incluir uma distribuiçãode pressões móvel nas equações da quantidade de movimento, na posição correspondente aoplano de flutuação do navio, sendo capaz de reproduzir a maioria dos fenómenos envolvidosna propagação da onda em direção à costa. Considerou-se como valores de referência osobtidos com a função de distribuição de Li e Sclavounos (2002) implementada por Nascimento(2007).Os testes foram realizados para um navio a navegar ao longo de uma faixa costeira definidapela intersecção de dois planos, um correspondente a um talude com inclinação de 1:50 e ooutro correspondente a um fundo horizontal. Os resultados mostram que na região do fundoinclinado as cristas de ondas vão-se curvando de forma a ficarem paralelas à linha de costa, ena região com profundidade constante verificam-se padrões de ondas de Kelvin.
Ano: 2013
Número Páginas:
13p.
Autor(es): Rodrigues, S.; Nascimento, M.; Fonseca, N.; Santos, J. A.; Neves, C. F.
Keywords: Modelo numérico funwave; Pressão móvel; Propagação de ondas
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Small overtopping at Albufeira harbour: field measurements and modelling
Overtopping evaluation is often performed by empirical methods that still requirecomplementary validation against field measurements. This study presents the first data set ofovertopping measured at a breakwater in Portugal, including flow depths, velocities anddischarges. Data were collected for small overtopping conditions (lower than 1.24*10-3m3/s/m) and compared with estimated values from empirical methods. The correctedNN_OVERTOPPING2 (corrected) tool proved to give reasonable estimations when the overallanalyzed period was considered, while the uncorrected NN_OVERTOPPING2 and theEurOtop formulas were unable to adequately represent the measured discharges. Pn(normalized wave power) is suggested as a proxy to achieve discharge predictions usingoffshore wave parameters and the sea level (tide and surge).
Ano: 2013
Número Páginas:
10p.
Autor(es): Ferreira, Ó.; Reis, M. T.; Carrasco, A. R.; Neves, M. G.; Neves, D. R.; Didier, E.
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2D analysis of the hydrodynamic behaviour of coastal structures using image processing tools and numerical models
The work here presented is part of the DESTAQ project (Development of advanced techniques to measure the velocities and study the interaction between detached breakwaters and harbour structures) and aims to analyse the hydrodynamic behaviour of a detached structure as a protection element for a main rubble mound breakwater.The hydrodynamic analysis included the use of image processing tools on physical model tests, and the use of the numerical model IH-2VOF. A comparison between the velocity fields obtained with both techniques is presented.
Ano: 2012
Número Páginas:
10p.
Autor(es): Lopes, H. -; Taveira-Pinto, F.; Gomes, F.V.; Pereira, R.; Cabral, J.; Sánchez, R.; Neves, M. G.; Reis, M. T.; Gadelho, J.
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A contribution to the study of wave propagation and wave breaking: physical and numerical modelling
The knowledge of the wave transformation and breaking characteristics near the coastline is essential for the design of coastal structures. This paper reports the experimental and numerical results of wave shoaling and breaking over a set of different gentle slopes. Two different numerical models are compared: a multi-layered Boussinesq model (COULWAVE) and a RANS model (FLUENT®). From the numerical tests, RANS model shows a better behavior than Boussinesq model and needs less calibration parameters; however computational time is the drawback of RANS models.
Ano: 2012
Número Páginas:
10p.
Autor(es): Conde, J. M.; Fortes, C. J. E. M.; Didier, E.; Neves, D. R.; Endres, L.
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A New Wave Breaking Criterion for a Finite Element Boussinesq Model
This paper describes the implementation and validation of two wave breaking methodologies in the BOUSSWMHnumerical model (BOUSSinesq Wave Modelfor Harbors). BOUSS-WMH is a finite element model forwave propagation based upon the extended Boussinesq equation derived by Nwogu [8].In the present work, two empirical formulations were used: the first one is the well know and widespread usingfree surface elevation acceleration method and the other one is the newly developed that includes RelativeTrough Froude Number. The two will be compared and their main advantages and disadvantages will beevaluated.
Ano: 2012
Número Páginas:
10p.
Autor(es): Pinheiro, L.; Fortes, C. J. E. M.; Santos, J. A.; Fernandes, J. L. M.; Okamoto, T.
Keywords: Finite elements; Boussinesq equations; Wwave propagation; Wave breaking
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Análise do comportamento do navio no mar por um método dos painéis simplificado e pela teoria das faixas
Assumindo a linearidade da interação navios com ondas, é possível, partindo da função resposta em frequênciado navio, determinar o espectro da resposta do navio a partir do espectro de um estado de agitação incidente nonavio.Nesta comunicação, apresentam-se e comparam-se as características do comportamento de um navio a avançarem ondas regulares e irregulares com base em dois métodos que se baseiam na teoria das faixas [1] e na teoriados painéis [2], para determinar a resposta em frequência do navio a um estado de agitação irregular, e avaliasea probabilidade de ocorrência da amplitude do movimento num ponto do navio exceder um determinadocritério. O método dos painéis é baseado na função de Green estacionária (sem velocidade) e os efeitos davelocidade do navio são introduzidos nos coeficientes hidrodinâmicos através da modificação da frequência deoscilação.
Ano: 2012
Número Páginas:
15p.
Autor(es): Rodrigues, S.; Fonseca, N.; Santos, J. A.
Keywords: Teoria das faixas; Método dos painéis; Funções de resposta; Movimentos do navio
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Análise numérica da interação entre escoamentos a baixos números de Reynolds e cilindros apoiados em base elástica
Neste artigo são apresentadas análises numéricas de fenômenos que ocorrem na interação entre escoamentos com baixos números de Reynolds e cilindros apoiados em base elástica. As simulações são realizadas através de um modelo numérico que usa o método semi-implícito de Taylor-Galerkin de dois passos para discretizar as equações de Navier-Stokes e a formulação Lagrangeana-Euleriana Arbitrária (ALE) para seguir o movimento do cilindro. A descrição de movimento do corpo rígido é determinada através do método de Newmark. Primeiramente, são analisadas as características do processo de geração de vórtice para o cilindro fixo. Neste caso, são obtidos os resultados do número de Strouhal e dos coeficientes de arrasto e de sustentação para números de Reynolds variando de 90 a 140. Posteriormente é realizada a análise do cilindro com suporte flexível (com uma mola e um amortecedor) na direção transversal ao escoamento. São estudados o deslocamento do cilindro e as frequências de vibração, assim como o fenômeno de sincronização (lock-in) entre o desprendimento de vórtices e a frequência de vibração. Os resultados numéricos são comparados com os obtidos experimentalmente por outros autores.
Ano: 2012
Número Páginas:
124-131pp.
Autor(es): Gonçalves, R.; Teixeira, P.; Didier, E.
Keywords: Interação fluido-estrutura; Cilindro oscilante; Método dos elementos finitos
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Aplicação do modelo numérico SWAN à geração e propagação de ondas geradas por vento em recintos fechados
Este trabalho trata da aplicação do modelo numérico SWAN - acrónimo de Simulating WAves Nearshore
Ano: 2012
Número Páginas:
7p.
Autor(es): Maciel, G.; Vieira, A.; Fortes, C. J. E. M.; Minussi, C.; Cunha, Evandro; Ferreira, Fabiana; Fiorot, Guilherme
Keywords: Ilha solteira; Previsão de ondas; Swan
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Aplicação do modelo SWAN na caracterização a agitação marítima na zona adjacente a Diogo Lopes, Brasil
N/A
Ano: 2012
Número Páginas:
147-150pp.
Autor(es): Ângelo, J.; Pires Silva, A.; Fortes, C. J. E. M.; Matos, M. F.; Scudelari, A. C.; Amaro, V. E.
Keywords: Atrito no fundo; Rebentação parcial; Brasil; Diogo lopes; Swan; Agitação marírtima
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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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D1.1: Analysis of past extreme events, lessons learned ans SoA models V1
C2IMPRESS is a multi-disciplinary project which aims to enhance understanding and public awareness on multi-hazard risk, based on innovative models, methods, frameworks, tools and technologies to develop decision-making platforms with a fine-grained spatio-temporal data to better assess impacts, vulnerability and resilience on natural hazards. This Report is the Deliverable 1.1 and belongs to Work Package 1, which is mainly addressed to identify the past climate and physical processes that underlie natural disaster events and their consequences
Ano: 2023
Autor(es): Moragues, A.; Estrany, J.; Alves, E.; Zózimo, A. C.; Leitão, T. E.; Ruiz, M.; Oliveira, M. M.; Sfetsos, A.; Fernandes, T. F.
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Demonstration and technical tours plan
A major objective of TRA LISBON 2022 Conference is to boost research and innovation capacity for the transport sector, throughout a full innovation cycle, from idea to market. Having this in view, the project
Ano: 2022
Autor(es): Batista, F. A.; Marecos, V.; Antunes, M. L.; Macedo, A. L.; Freire, A. C.; Capitão, R.; Arsénio, E.; Maia, L.
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Demonstration submission and selection guidelines
The demonstration area will be one of the main focus points of TRA LISBON 2022, presenting multifunctional spaces and being prepared to receive a large number of different types of on-site demonstrations (indoor and outdoor). On-line demonstrations will also be an option, allowing for the widest possible coverage of access for all the participants.The dedicated areas will allow for interactive demonstrations of technological innovations to be carried out by and for industry partners, researchers, and other stakeholders. Demonstrations are an excellent opportunity to introduce conference attendees in an engaging way, as well as to promote new contacts and promising business.
Ano: 2022
Autor(es): Freire, A. C.; Arsénio, E.; Macedo, A. L.; Antunes, M. L.; Capitão, R.; Belinha, M.
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Technical tours organization criteria and procedures report
According to the CSA project plan, WP5.2 task objective is to organize technical tours that feature attractive and interactive showcases aiming at engaging participants into novel technologies for all transport modes and enabling stakeholders and their companies to disseminate and even sell their products and applications to all interested parties.
Ano: 2022
Autor(es): Capitão, R.; Macedo, A. L.; Arsénio, E.; Antunes, M. L.; Freire, A. C.
Editor: TRA LISBON 2022
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Data Repository Rules. Deliverable 10.4
This report is part of HYDRALAB+ Work Package 10, which seeks to strengthen the coherence of experimental hydraulic and hydrodynamic research undertaken by the HYDRALAB+ partner organisations. It outlines the work carried out by Samui Design & Management Ltd, supported by HR Wallingford, in relation to the development of a data repository structure that can be adopted by participants of the HYDRALAB+ project.
Ano: 2018
Autor(es): Mendonça, A. C.; Fortes, C. J. E. M.; Neves, M. G.; Capitão, R.; Lemos, R.; Reis, M. T. L. G. V.
Keywords: Data from physical modeling; Zenodo; Data repository structure
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Data Storage Report. RECIPE Task 8.2: Overtopping events in breakwaters under climate change scenarios
Reliable prediction of wave run-up/overtopping and structure damage is a key task in the design and safety assessment of coastal and harbor structures. Run-up/overtopping and damage must be below acceptable limits, both in extreme and in normal operating conditions, to guarantee the stability of the structure and the safety of people and assets on and behind the structure. The mean-sea-level rise caused by climate change and its effects on wave climate may increase the number and intensity of run-up/overtopping events and make the existing coastal/harbor structures more vulnerable to damage.Accurate estimates, through physical modelling, of the statistics of overtopping waves for a set of climate change conditions, are needed. The research project HYDRALAB+ (H2020-INFRAIA-2014-2015) gathers an advanced network of environmental hydraulic institutes in Europe, which provides access to a suite of environmental hydraulic facilities. They play a vital role in the development of climate change adaptation strategies, by allowing the direct testing of adaptation measures and by providing data for numerical model calibration and validation. The use of physical (scale) models allows the simulation of extreme events as they are now, and as they are projected to be under different climate change scenarios.The enclosed dataset refers to the experimental work developed at LNEC within HYDRALAB+ and considers 2D damage and overtopping tests for a rock armor slope, with four different approaches to represent storms. Data of free surface elevation, overtopping and damage is presented.
Ano: 2018
Autor(es): Fortes, C. J. E. M.; Mendonça, A. C.; Lemos, R.; Neves, M. G.; Reis, M. T. L. G. V.; Capitão, R.
Keywords: Climate change; Overtopping; Data repository
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Facilitating the re-use and exchange of experimental data. Task 10.1 Critical review. D10.2 Critical Review of data flux between laboratory models, numerical models and field case studies
The HYDRALAB+ project is aimed at strengthening the coherence of experimental hydraulic and hydrodynamic research undertaken across its partner organisations. This report is D10.2 of the HYDRALAB+ project, entitled
Ano: 2018
Autor(es): Mendonça, A. C.; Fortes, C. J. E. M.; Neves, M. G.; Capitão, R.; Lemos, R.; Reis, M. T. L. G. V.
Keywords: Field data; Numerical modeling data; Physical modeling data; Data flux
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Facilitating the re-use and exchange of experimental data. Task 10.2 Data Standards and Licenses. D 10.3 Data Standards Report
The HYDRALAB+ project is aimed at strengthening the coherence of experimental hydraulic and hydrodynamic research undertaken across its partner organisations. This report is D10.3 of the HYDRALAB+ project, entitled
Ano: 2018
Autor(es): Mendonça, A. C.; Fortes, C. J. E. M.; Neves, M. G.; Capitão, R.; Lemos, R.; Reis, M. T. L. G. V.
Keywords: Data management options; Experimental data; Data formats
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Protocols for representing variability and unsteadiness in flume facilities. Deliverable Number 8.2
This deliverable is related to task 8.2
Ano: 2018
Autor(es): Mendonça, A. C.; Fortes, C. J. E. M.; Lemos, R.; Capitão, R.; Neves, M. G.; Reis, M. T. L. G. V.
Keywords: Extreme events; Climate change; Variability in flume facilities
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Sistema de previsão, alerta e gestão de riscos causados pela agitação marítima - Relatório inicial Arquitetura e características gerais do sistema para os portos de Madalena do Pico, São Roque do Pi
Neste relatório inicial são apresentadas a arquitetura e as caraterísticas gerais dos protótipos do sistema de previsão, alerta e gestão de riscos causados pela agitação marítima para os portos de Madalena do Pico, São Roque do Pico e Praia da Vitória. Os três protótipos em desenvolvimento têm por base uma arquitetura semelhante, com características distintas, nomeadamente no que respeita à localização dos dados de base, às malhas computacionais utilizadas e às características físicas das fronteiras, tanto no plano horizontal (interface terra-mar), como no vertical (batimetria dos fundos). Caracteriza-se o layout geral dos portos, bem como a sua morfologia e operabilidade.
Ano: 2018
Autor(es): Pinheiro, L.; Fortes, C. J. E. M.; Reis, M. T.; Poseiro, P.
Keywords: Porto de Praia da Vitória; Porto de São Roque do Pico; Porto de Madalena do Pico; Agitação marítima; Alerta e gestão de riscos; Sistema de previsão
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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
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Ano: 2005
Autor(es): Reis, M. T. L. G. V.
Editor: ******
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Guidelines and Recommendations for River Information Services - PIANC
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Ano: 2004
Autor(es): J.A Covas
Editor: ******
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Departamento de Hidráulica e Ambiente
