Publicações

The HYDRALAB+ Project is an advanced network of European research organisations that focus on physical modelling of environmental hydraulics. The aim is to develop and improve the experimental facilities for the investigation of expected climate change impacts to ensure that future management and adaptation measures are effective. An important aspect of this work is to identify new or alternative experimental methods and resources to better support future work in modelling climate change impacts and adaptation strategies.

Numerical simulations using the SWAN-VEG model (Simulating WAves Nearshore, with vegetation module) were performed considering the case of Ilha Solteira (SP) reservoir, a navigable stretch of the Tietê

Scour protection is an important component of fixed bottom foundations for offshore wind turbines. Depending on the hydrodynamic conditions, they might be indispensable to avoid the structural collapse of the foundation due to scour phenomena. The design of scour protections is typically deterministic, which often results in overestimated mean diameters of the armour layer.Moreover, the design methodologies currently applied do not provide a measure of safety associated with the proposed design. The present research proposes a novel methodology to assess the safety of the protection and to perform the probabilistic design of static and dynamic scour protections. A case study based on Horns Rev. 3 offshore wind farm is used to show how to select the mean stone diameter according to a pre-defined probability of failure of the protection. The results show that a dynamic scour protection could be safely designed with a reduction of the mean stone diameter up to 15 cm, when compared with the statically stable protection.

The Canary Islands have a long coastline with varying levels of exposure to severe sea conditions. Frequent states of alert and emergency in some parts of their coastline are commonly related to the occurrence of extreme wave conditions. Among the phenomena directly driven by the waves when reaching the shore are the wave run-up and overtopping. Both the study of the flood level, including its variability, and the associated risks are key tools in the planning and management of coastal zones. The aim of this research is to examine the probability of occurrence of run-up events capable of exceeding different topographical levels, for estimating the risk level associated with flooding of the different areas in which the Boca Barranco Beach can be divided, in terms of their nature and use. This beach is located on the island of Gran Canaria, Spain, and is part of the site of scientific interest of Jinámar. A large wave dataset is used as input to a high-resolution numerical model for propagating offshore wave conditions to shallow waters in the study area. Furthermore, the morphology of the study area is reproduced by combining different bathymetric databases. Finally, the probability of occurrence of different levels of run-up and the corresponding levels of consequences are assigned, to assess the flood risk in the different areas of the beach, which are presented in a risk map of flooding in the study area.

Scale-model tests are usually required to evaluate the hydraulic and structural behavior of proposed rubble-mound breakwater designs. In order to speed up and ease the armor layer damage assessment, we developed a technique based on stereo photogrammetry. A key feature of this technique is its ability to compensate for the refraction in the air-water interface, thus producing a survey of the envelope of the armor layer without the need to empty the wave flume or wave basin where the scale model tests are carried out. This article describes this technique and the tests made to establish confidence in it and in the damage evaluation on a breakwater scale model. Results led to an error estimation of only fractions of a centimeter.

O HIDRALERTA é um sistema de previsão, alerta e avaliação do risco de galgamentos/inundação em zonas costeiras e portuárias, partindo da utilização de medições/previsões da agitação marítima para calcular o galgamento/inundação nessas zonas. O cálculo dos caudais médios galgados sobre uma estrutura marítima é efetuado através de ferramentas neuronais e/ou fórmulas empíricas, que não permitem definir a distribuição espacial desse caudal atrás da estrutura.Este artigo apresenta a aplicação ao porto/baía da Praia da Vitória, Açores, de um método expedito para modelar essa distribuição espacial, recorrendo a ferramentas SIG. Foi estabelecida uma relação entre a cota de inundação e o volume galgado de água através da utilização de um modelo digital de terreno. Este trabalho representa um primeiro passo na elaboração de um mapa de risco associado ao galgamento costeiro.

N/A

O sistema integrado para a simulação da agitação marítima em zonas portuárias e costeiras, GUIOMAR, foi desenvolvido no Laboratório Nacional de Engenharia Civil (LNEC) com base no software comercial de Informação Geográfica, ArcGISTM. Neste trabalho descreve-se a aplicação deste sistema na avaliação do risco para a navegação em zonas portuárias.Criou-se um conjunto de procedimentos automáticos que implementam uma metodologia de avaliação do risco para a navegação, com base na altura do movimento vertical de um navio induzida pela agitação marítima incidente ao longo da sua trajectória. Nesta metodologia considera- -se o grau de risco como o produto do grau atribuído à probabilidade de ocorrência de movimentos verticais que ultrapassam um limiar pré-estabelecido pelo grau atribuído às consequências dessa excedência.A metodologia foi testada no porto da Praia da Vitória, na ilha Terceira, Açores. Assim, partindo das características da agitação marítima previstas no interior do porto com recurso aos modelos numéricos de propagação de ondas (SWAN e DREAMS), para o ano de 2009, determinaram-se as correspondentes alturas significativas dos movimentos verticais do N/M Fernão Gomes, utilizando a função de transferência definida com o modelo WAMIT, para duas trajectórias de entrada ao porto. A aplicação desta nova metodologia considerando as alturas significativas dos movimentos verticais obtidos e um limiar pré-estabelecido (0.5 m) permitiu construir mapas de risco ao longo das duas trajectórias do navio no interior do porto .Este trabalho constitui mais um passo na criação de um sistema de suporte à decisão para a navegação portuária

Sea waves can pose significant problems to port infrastructures and activities. Hence the importanceof correctly predict and characterize the wave field inside ports, more precisely on navigation routesand berthing locations. This paper describes the numerical model BOUSS3W, a finite element model for nonlinearwave propagation near shore and wave penetration in harbors. This model is also able to perform resonancestudies in harbors. It is based upon an extended version of Boussinesq equations. Terms were added togenerate regular or irregular waves inside the numerical domain, absorb outgoing waves, partially reflectwaves at physical boundaries, control numerical instabilities and reproduce energy dissipation due to bottomfriction and wave breaking. Implementation of partial reflection, bottom friction and wave breaking are describedand applications to real and experimental test cases are presented, namely, Vila do Porto Harbor. Resultsare compared with physical model tests and other numerical models.

Wave breaking has different physics from the potential flow wave motion. The roller model introduced by Svendsen [1] illustrates the separation of the wave motion and the roller. The roller propagation speed, therefore, is a very important factor for the energy calculation of the bore.The wave celerity data collected at the wave tank displays that the maximum roller propagation speed occurs when the wave has already decayed due to the breaking. This fact clearly displays that the bore energy cannot be calculated only from the wave height as it is done for non-breaking waves.It is certain that most the energy is dissipated through the roller formation in the outer surfzone, but a certain amount of energy is transferred to the roller at the same time and it accelerates the bore speed. Slow decay of the roller propagation speed indicates that the excess energy left in the roller dissipates in the inner surfzone at much slower rate than in the outer surfzone. Therefore, these two zones have to be clearly separated, but the amount of energy transferred into the roller is unknown.In this paper, we focus on the examination of the peak roller propagation speed that appears at the border of the outer and the inner surfzone by using the experimental data collected at the wave tank. In that way, the initial condition of roller propagation speed can be determined for the inner surfzone. The energy conservation between the wave motion and the roller kinetic energy derives an equation to calculate the roller propagation speed. The energy transfer rate is estimated by adjusting the value given by the full energy conversion with the observed roller propagation speed. It is found that about half of the energy is transferred into the roller. The model successfully illustrates the peak bore propagation speed which existing formulae cannot explain.

This paper describes the in-situ measurements and the application of two wind wave generatednumerical models (SWAN and OndisaCaD) to the reservoir of Ilha Solteira dam in order tosimulate the wind waves generation and propagation in that reservoir. A comparison betweennumerical results for selected wind conditions (highest average wind speed and the highestwind speed) is made and discussed. SWAN is also applied to the wind conditions observedduring a six month period. This work permits to evaluate the performance of the numericalmodels and its adequacy to characterize the wind generated waves at that region.

Nesta comunicação descreve-se uma ferramenta numérica capaz de caracterizar a respostadum navio amarrado no interior dum porto sujeito à acção da agitação marítima.Para este efeito utilizam-se previsões de estados de mar ao largo do porto em questão que sãopropagados para o seu interior com um modelo numérico do tipo Boussinesq capaz de simularefeitos complexos como a refracção, difracção, reflexão parcial, interacções não lineares,dissipação de energia devida ao atrito de fundo e rebentação das ondas. O modelo é o BOUSSWMH(BOUSSinesq Wave Model for Harbours, Pinheiro et al. (2011), e permite uma descriçãoprecisa da evolução de estados de mar reais em zonas abrigadas de profundidade variável.As interacções entre ondas e estruturas flutuantes são modeladas com recurso ao pacoteMOORNAV, Santos 1994 que utiliza dois modelos: WAMIT (Korsemeyer et al., 1988) quedetermina com o método dos painéis a resposta do navio livre sujeito a ondas monocromáticasunidireccionais; e BAS (Mynett et al. 1985) que monta e resolve, no domínio do tempo, asequações de movimento de um navio amarrado no posto de acostagem levando em conta asséries temporais das forças devidas às ondas incidentes no navio, as funções de resposta aimpulso do navio e as relações constitutivas dos elementos do sistema de amarração.Descrevem-se os modelos numéricos BOUSS-WMH, WAMIT e BAS e a forma como osresultados são transferidos entre eles e apresenta-se uma aplicação desta ferramenta integradaa um navio amarrado num porto esquemático sujeito a quatro estados de mar diferentes.

Esta comunicação descreve a implementação da formulação da dissipação deenergia por rebentação da onda no modelo de elementos finitos BOUSS3W e respectivavalidação. Este modelo de elementos finitos é baseado nas equações de Boussinesqestendidas deduzidas por Nwogu válidas desde águas de profundidade intermédia a águaspouco profundas. O modelo permite simular a propagação não linear e dispersiva deondas regulares ou irregulares tendo em conta alguns dos fenómenos mais importantespresentes nas regiões costeiras. A implementação da rebentação da onda no modeloBOUSS3W é efectuada através da inclusão de termos de viscosidade turbulenta nasequações de conservação da quantidade de movimento, que é dependente de um conjuntode parâmetros relacionados com o início, fim e duração da rebentação, que têm de sercalibrados para cada caso de estudo. A validação da implementação da rebentação foiefectuada recorrendo a casos de propagação e rebentação de ondas regulares embatimetrias de complexidade diferente (perfis de praia de inclinação constante e do tipobarra-fossa). Para estes casos, existem resultados experimentais, considerando diferentescondições de agitação. É realizada uma análise estatística de modo a caracterizar odesempenho do modelo e a sua capacidade na simulação da rebentação e dos efeitos nãolineares.

Desde 2007, o modelo SPHysics tem vindo a ser estudado, desenvolvido e utilizado noLaboratório Nacional de Engenharia Civil (LNEC), com o objectivo de verificar a suaaplicabilidade a estudos de interacção onda-estrutura. Para continuar o seu desenvolvimento, omodelo necessita de ser validado de forma a se dispor de uma ferramenta útil.Para tal, iniciou-se recentemente o projecto de investigação

The present paper gives a general overview of the large-scale physicalmodel experiments performed at the LIM/UPC in Barcelona, within the EU-HydralabIII Integrated Infrastructure Initiative. The model tests have been carried out in a flumewith a sandy dune exposed to a combination of water levels and wave conditions. Differentregimes of wave attacks on the sandy beach/dune system have been investigated.In particular, the study provides a unique set of large-scale physical data concerningthe wave-induced dune overwash. Measurements of hydrodynamics, sediment concentrationsand beach-dune profile evolution have been carried out. Profile measurementshave been used to calibrate and validate a numerical model (Kobayashi et al. 2007) topredict beach-dune profile modifications over the near-shore region. The numericalmodel is shown to be in agreement with the experimental data.

As equações não lineares de declive suave dependente do tempo são estendidasde forma a incluírem dissipação de energia por rebentação, através da consideração dastensões de Reynolds na equação da conservação da quantidade de movimento e dadedução de uma nova equação não linear de declive suave dependente do tempo. Omodelo apresentado neste trabalho é aplicado a um conjunto de ensaios em modelo físico,referentes à propagação e rebentação das ondas em praias de declive constante Os testesefectuados permitiram seleccionar o critério de rebentação e definir regras para adeterminação dos valores para as condições críticas de início e de fim da rebentação,calibrar o valor a atribuir à constante dos termos dissipativos e definir regras para a suadefinição, assim como para avaliar o desempenho do modelo. Foram obtidos bonsresultados, embora o empolamento da onda tenha sido subestimado. Verificou-se umaestreita relação entre o valor a utilizar para a condição crítica de início da rebentação ea declividade da onda à entrada do domínio de cálculo, e entre o valor da constante dostermos dissipativos e o número de Ursell à entrada do domínio

N/A

N/A

N/A

N/A

N/A

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

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

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.

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.

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.

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.

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

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

This deliverable is related to task 8.2

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.

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.

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

Realização de ensaios em modelo físico reduzido 3D para a avaliação da estabilidade do quebra-mar destacado do Porto Inlgês, Maio, Cabo-Verde

N/A

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.

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

N/A

N/A

N/A