Papers
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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.
Year: 2025
Author(s): Teixeira, P.; Didier, E.
: 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.
Year: 2024
Author(s): 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.
Year: 2024
Author(s): 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
Year: 2024
Author(s): 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%
Year: 2024
Number Pages:
1-15pp.
Author(s): Garzon, J.L.; Ferreira, Ó.; PLOMARITIS, T.A.; Zózimo, A. C.; Fortes, C. J. E. M.; Pinheiro, L.
: 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%
Year: 2024
Author(s): Garzon, J.L.; Ferreira, O.; PLOMARITIS, T.A.; Zózimo, A. C.; Fortes, C. J. E. M.; Pinheiro, L.
: 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
Year: 2024
Author(s): Abdelwahab, H.S.; Pinheiro, L.; Santos, J. A.; Fortes, C. J. E. M.; Guedes Soares, C.
: 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.
Year: 2024
Number Pages:
16p..
Author(s): Gadelho, J.; REZANEJAD, K.; Guedes Soares, C.; Santos, J. A.; Anastas, G.; Fortes, C. J. E. M.
: 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%.
Year: 2024
Number Pages:
14p..
Author(s): Reis, R.; Fortes, C. J. E. M.; Rodrigues, J.; HU, Z.; Suzuki , T.
: 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
Year: 2024
Author(s): 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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Comunicação
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Modelação física da resposta à agitação incidente de um trecho do quebra-mar do porto da Ericeira
Para caracterizar a resposta de um trecho do quebra-mar de taludes do porto da Ericeira à agitação marítima nele incidente, realizaram-se no canal de ondas irregulares do LNEC um conjunto de ensaios com um modelo reduzido desse mesmo trecho. Nesta comunicação descreve-se a instalação experimental, incluindo os diversos instrumentos utilizados para medir as séries temporais das várias grandezas de interesse e o programa de ensaios, apresentando-se as grandezas medidas num subconjunto dos ensaios considerado mais interessante. Nestas grandezas incluem-se a elevação da superfície livre associada à agitação incidente, o espraiamento ao longo do talude, o volume de água de água galgado, a pressão em vários pontos da superestrutura e a erosão do manto protetor.
Year: 2021
Number Pages:
5p.
Author(s): Santos, J. A.; Lemos, R.; Fortes, C. J. E. M.; Neves, M. G.; Pinheiro, L.; Pinto, M.; Sanches, C.; Gueifão, J.; Zózimo, A. C.
Editor: APRH
Keywords: Dano; Superestrutura; Galgamento; Espraiamento; Agitação marítima
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Modelação numérica: análise dos parâmetros de surfabilidade de um quebra-mar destacado multinfuncional em frente à praia da Vagueira
O presente trabalho enquadra-se no estudo de caracterização e definição de parâmetros de dimensionamento e localização de um quebra-mar destacado (QMD), em frente à Praia da Vagueira (Município de Vagos, distrito de Aveiro) que está a ser desenvolvido para a Agência Portuguesa do Ambiente, I.P.,.Pretende-se que o QMD seja multifuncional contribuindo para reduzir o risco de galgamentos costeiros no aglomerado urbano da Praia da Vagueira; promover o eventual acréscimo do areal da praia emersa em frente à defesa aderente, reforçando a defesa natural contra a erosão e inundação costeira e fomentando o seu maior usufruto pela população e segurança balnear; e ainda criar condições físicas para promover ondas de surf, potenciando a economia associada a esta atividade.Neste âmbito, e para análise das potencialidades do QMD para promover ondas de surf na zona, aplica-se o modelo não-linear de tipo Boussinesq COULWAVE na simulação da propagação de ondas na zona em estudo, para a situação antes e após a implantação do QMD. Este modelo permite reproduzir a maioria dos fenómenos intervenientes na transformação da onda em fundos de profundidade variável e na presença de correntes: dispersão de frequência, dispersão de amplitude, empolamento (linear e não-linear), difração, refração pelo fundo e devida às correntes, geração de harmónicas e dissipação de energia por rebentação da onda.Analisam-se os parâmetros de surfabilidade necessários para verificar se as condições na zona são propícias para a prática do surf, nomeadamente o número de Iribarren, ângulo de rebentação, amplificação da onda e o comprimento da linha de rebentação.
Year: 2021
Number Pages:
4p.
Author(s): Mendonça, A. C.; Fortes, C. J. E. M.; Santos, J. A.
Editor: APRH
Keywords: COULWAVE; Modelação numérica; Parâmetros de surfabilidade; Vagueira; Quebra-mar destacado
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Porto de Peniche: ensaios em modelo físico de um trecho do quebra-mar oeste
Nesta comunicação descreve-se o conjunto de ensaios efetuados em modelo reduzido de um perfil do quebra-mar oeste do porto de Peniche. O objetivo destes ensaios é avaliar o impacto no espraiamento, no galgamento, nas pressões na superestrutura e na evolução do dano no talude do perfil, de diferentes condições de agitação marítima extremas designadamente as associadas a cenários de alteração climática.
Year: 2021
Number Pages:
3p.
Author(s): Mendonça, A. C.; Fortes, C. J. E. M.; Lemos, R.; Neves, M. G.; Capitão, R.; Pinheiro, L.; Costa, C.E.B.C.; Reis, R.; Simão, J.; Soares, R. E.
Editor: CNME2020
Keywords: Peniche; Dano; Superestrutura; Galgamento; Espraiamento; Agitação marítima; Modelação física
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Project TO-SEALERT. First developments
The project To-SEAlert aims to develop, implement and validate a set of tools/methodologies for an early warning, forecast and alert, emergency planning and risk management WebGIS system, based on the existing HIDRALERTA system. This updated WebGIS system will help responsible authorities to monitor, prevent and/or manage overtopping and flood emergency events in coastal and port areas and to plan investments on a long-term basis. The new system includes the use of satellite and video images, numerical and physical modelling, and quantitative risk assessment techniques to enhance the reliability and efficiency of the system. It will also establish/implement/monitor emergency plans to help authorities handle these events. The test cases are Costa da Caparica and Ericeira harbour, sites with significant occurrence of wave driven overtopping and flooding with significant consequences for the infrastructures, goods, and people.This paper aims to describe the project, namely its objectives, methodology and main expected results, as well as the achievements attained so far.
Year: 2021
Number Pages:
4p.
Author(s): Fortes, C. J. E. M.; Reis, M. T. L. G. V.; Zózimo, A. C.; Santos, J. A.; Pinheiro, L.; Lemos, R.; Capitão, R.; Fonseca, A. M.; Barateiro, J.; Serrazina, V.; Craveiro, J.; Andriolo, U.; Taborda, R.; Si
Editor: APRH
Keywords: Risk assessement; Early warning; Flooding; Overtopping; To-SEAlert
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Prótotipo do TO-SEALERT para o porto da Ericeira
O projeto de investigação e desenvolvimento To-SEAlert financiado pela Fundação para a Ciência e a Tecnologia e envolvendo o LNEC, a FCiências.ID, a NOVA.ID.FCT e o ISEL tem como objetivo o desenvolvimento de um sistema de previsão, alerta, planeamento de emergência e gestão de risco de galgamentos e inundações em zonas costeiras e portuárias, com base no sistema HIDRALERTA. Partindo das características da agitação marítima ao largo e utilizando modelos numéricos para a propagação e deformação da agitação marítima, o sistema HIDRALERTA estima os parâmetros relevantes da agitação marítima para a avaliação do galgamento e da inundação bem como o risco associado a esses eventos. As funcionalidades que se pretendem melhorar no âmbito do projeto To-SEAlert dizem respeito às metodologias de previsão do galgamento e da delimitação da zona inundada, bem como no apoio à resposta a situações de emergência envolvendo fenómenos de galgamento. A implementação e a validação do protótipo do To-SEAlert estão a ser efetuadas para a zona costeira da Costa da Caparica e para o porto da Ericeira.Esta comunicação apresenta o trabalho desenvolvido até à data na construção e desenvolvimento do protótipo do To-SEAlert para o porto da Ericeira.
Year: 2021
Number Pages:
4p.
Author(s): Zózimo, A. C.; Fortes, C. J. E. M.; Reis, M. T. L. G. V.; Pinheiro, L.; SMITHERS, N; Serrazina, V.
Editor: APRH
Keywords: Emergência; Previsão e alerta; Galgamento; HIDRALERTA; To-SEAlert; Ericeira
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Run-up measurements under very oblique wave incidence
Under the scope of the HYDRALAB+ transnational access project, the so-called RODBreak was conducted in the directional wave basin at the Marienwerden facilities of the Leibniz UniversityHannover (LUH).A stretch of a rubble-mound breakwaterwas built in the wave basinwith a very gentle slope and an armour layer made of Antifer cubes, at the roundhead and adjoining trunk, and rock, at the rest of the trunk.Aset of scale-model tests wascarried out to extend the range of wave steepness values analysedin wave run-up, overtopping and armour layer stability studies, focusing on oblique extreme wave conditions,with incident wave angles from 40º to 90º.The present study focuses on the analysisof measured wave run-up values obtained ina physical model and on its variability with wave parameters and wave obliquity.
Year: 2021
Number Pages:
4p.
Author(s): Lemos, R.; PINA, V.; Santos, J. A.; Fortes, C. J. E. M.; Reis, M. T. L. G. V.
Editor: APRH
Keywords: RODbreak; Physical modelling; Oblique waves; Run-up; Rubble-mound breakwaters
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Simulation of hurricane Lorenzo at the port of Madalena do Pico, Azores, by using the HIDRALERTA system
HIDRALERTA is a forecast, early warning and risk assessment system of port and coastal areas that uses measurements/estimates of sea-waves and water levels to evaluate overtopping/flooding. The calculation of the mean overtopping discharge over a maritime structure is performed through artificial neural network-based tools and/or empirical formulae. The system is composed of four modules developed in open source Web technology, mainly using the Python language. This paper presents its application to reproduce the hurricane Lorenzo conditions and impacts at Madalena do Pico port, Azores, on October 2 2019. This hurricane was regarded as the strongest storm to hit Azores in 20 years. The application of HIDRALERTA focus mainly on the second and fourth modules: wave run-up/overtopping and warning system.
Year: 2021
Number Pages:
4p.
Author(s): SANTOS, M.I.; Fortes, C. J. E. M.; Reis, M. T. L. G. V.; Pinheiro, L.; Serrazina, V.; SALVADOR, M.; Reis, F.; Azevedo, E. B.
Editor: APRH
Keywords: Madalena do Pico; Risk assessment; Overtopping; Warning system; HIDRALERTA
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Análise da energia de ondas infragravíticas na Baía do Espírito Santo, Brasil
A energia das ondas infragravíticas na Baía do Espírito Santo foi investigada através de duas campanhas de medição de ondas em três locais distintos. A variação da energia infragravítica ao longo do tempo foi analisada em conjunto com a evolução do espectro direcional das ondas gravíticas, com o propósito de identificar uma possível relação entre as características das ondas longas e curtas. Quatro faixas de frequência foram utilizadas para particionar o espectro direcional de energia das ondas gravíticas, para observar a evolução destas ao longo do tempo. Nos eventos energéticos de ondas gravíticas medidos ao largo da baía, o aumento da energia na faixa infragravítica só ocorreu em ambos os pontos internos, de forma similar, quando as duas faixas de períodos dominantes do espectro gravítico eram maiores que 9s. Nas outras ocasiões, a região central apresentou maiores amplificações que o ponto nas imediações do Porto de Tubarão.
Year: 2020
Number Pages:
219-222pp.
Author(s): Colaço, G.; Gallo, M.; Parente, C.; Pinheiro, L.; Fortes, C. J. E. M.; Delpuppo, D.; Freitas, T.
: Atas das 6.as Jornadas de Engenharia Hidrográfica / 1.as Jornadas Luso-Espanholas de Hidrografia
Editor: Instituto Hidrográfico
Keywords: Ondas longas; Ondas infragravíticas; Ondas gravíticas
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Avaliação do galgamento costeiro sem e com um quebramar destacado na frente da praia da Vagueira
Um dos aspetos a analisar na caracterização e viabilidade de um quebra-mar destacado (QMD) multifuncional em frente à praia da Vagueira é a redução de galgamentos, consequência desejável que a implementação deste tipo de estrutura marítima terá nessa zona. Para isso, foi efetuada a caracterização da agitação na zona em estudo e a avaliação dos galgamentos, para a situação atual (sem estrutura) e para várias alternativas de QMD.Com base em dados estimados ao largo, a caracterização da agitação marítima local foi obtida mediante a transferência desses dados para pontos junto à costa, utilizando, nesta ordem, os modelos de propagação de ondas marítimas SWAN e DREAMS. O período de dados ao largo considerado foi de 39 anos (1979-2018), com intervalo de 6 em 6 horas. Seguidamente, recorrendo à fórmula de Mase et al. (2013), calculou-se o caudal médio galgado na estrutura de defesa aderente aí existente, sem e com as diferentes alternativas de QMD. Finalmente, a comparação dos resultados obtidos permitiu avaliar o desempenho do QMD na redução dos galgamentos costeiros na sua zona de influência.
Year: 2020
Number Pages:
187-190pp.
Author(s): Fortes, C. J. E. M.; Neves, M. G.; Capitão, R.; Pinheiro, L.
: Atas das 6.as Jornadas de Engenharia Hidrográfica / 1.as Jornadas Luso-Espanholas de Hidrografia
Editor: Instituto Hidrográfico
Keywords: QMD; Praia da Vagueira; Galgamentos; Erosão costeira; Agitação marítima
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Behaviour of moored ships in Azorean ports during hurricanes Lorenzo and Elsa
This work presents the results of numerical simulations of two ferry ships moored inside two ports of Pico
Year: 2020
Number Pages:
129-132pp.
Author(s): Pinheiro, L.; SANTOS, M.I.; Fortes, C. J. E. M.; Zózimo, A. C.
: Atas das 6.as Jornadas de Engenharia Hidrográfica / 1.as Jornadas Luso-Espanholas de Hidrografia
Editor: Instituto Hidrográfico
Keywords: Warning system; Overtopping; Lorenzo; Lajes das Flores; Hidralerta
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Capítulo de Livro
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Multi-functional artificial reefs for coastal protection
N/A
Year: 2009
Number Pages:
153-210 pp.
Author(s): Voorde, M.; Antunes do Carmo, J.; Neves, M. G.
Editor: Ch. A. Hudspeth, T. E. Reeve
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Tese de Doutoramento
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Trapped-mode propagation along irregular coasts
N/A
Year: 1999
Number Pages:
159 p.
Author(s): Santos, J. A.
Editor: ******
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Probabilistic Assessment of the Safety of Coastal Structures
N/A
Year: 1998
Number Pages:
594 p.
Author(s): Reis, M. T.
Editor: ******
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Unsteady Nearshore Currents on Longshore Varying Topographies
N/A
Year: 1998
Number Pages:
346 p.
Author(s): Sancho, F. E.
Editor: ******
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Simulação da agitação irregular. Técnicas matemáticas
N/A
Year: 1973
Author(s): Carvalho, M. M.
Editor: ******
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Relatório Científico
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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
Year: 2023
Author(s): 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
Year: 2022
Author(s): 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.
Year: 2022
Author(s): 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.
Year: 2022
Author(s): Capitão, R.; Macedo, A. L.; Arsénio, E.; Antunes, M. L.; Freire, A. C.
Editor: TRA LISBON 2022
Info
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.
Year: 2018
Author(s): 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
Info
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.
Year: 2018
Author(s): 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
Year: 2018
Author(s): 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
Year: 2018
Author(s): 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
Year: 2018
Author(s): 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
Info
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.
Year: 2018
Author(s): 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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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.
Year: 2024
Author(s): 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
Year: 2024
Author(s): 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
Year: 2023
Author(s): 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
Year: 2019
Author(s): 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.
Year: 2016
Author(s): 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
Year: 2016
Author(s): 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
Year: 2010
Number Pages:
1.
Author(s): 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
Year: 2005
Author(s): Reis, M. T. L. G. V.
Editor: ******
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Guidelines and Recommendations for River Information Services - PIANC
N/A
Year: 2004
Author(s): J.A Covas
Editor: ******
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Hydraulics and Environment Department
