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Now showing items 1801-1820 of 8548

Análise da energia de ondas infragravíticas na Baía do Espírito Santo, Brasil

Colaço, G.; Gallo, M.; Parente, C.; Pinheiro, L.; Fortes, C. J. E. M.; Delpuppo, D.; Freitas, T. (Instituto Hidrográfico, 2020-11)

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 ...
Testing storm impact modelling at São Pedro de Moel beach

Cabrita, P.; Ferreira, A. M.; Fortes, C. J. E. M.; Ferreira, Ó.; Freire, P. (Instituto Hidrográfico, 2020-11)

Numerical models are useful tools to predict the effects of storms in coastal areas. The objective of this work was to simulate the effects of storms in São Pedro de Moel beach by using XBeach. The nearshore sea state was ...
Wave energy assessment in Portugal potential locations for OWC installation

Anastas, G.; Pinheiro, L.; Fortes, C. J. E. M.; Santos, J. A. (Instituto Hidrográfico, 2020-11)

This work aims to determine the exploitable wave energy resource at six potential sites, located in the Azores, Madeira and Sines breakwater city harbours. For that purpose, the thirdgeneration wave model SWAN is used to ...
Comparação entre modelos numéricos na avaliação de eventos de galgamento costeiro – Caso de estudo: Costa da Caparica

Ferreira, A. M.; Fortes, C. J. E. M.; Reis, M. T. L. G. V.; Garzon, J.L. (Instituto Hidrográfico, 2020-11)

Este estudo recorre a ferramentas de modelação numérica, XBeach e SWASH, para a avaliação dos eventos de galgamento costeiro devido a tempestades marítimas no troço costeiro urbano da Costa da Caparica, que compreende a ...
Bond behaviour between steel/stainless-steel reinforcing bars and low binder concrete (LBC)

Freitas, E.; Louro, A. S.; Costa, H.; Cavaco, E.; Júlio, E.; Pipa, M. (Elsevier, Ltd., 2020)

Reducing the cement content of concrete is of paramount importance towards sustainability, since its production process is highly energy-consuming and delivers massive CO2 emissions to the atmosphere. In this paper, the ...
Proposta de lei de aderência entre varões de aço e betões com baixa dosagem de ligante com agregados naturais/reciclados

Pereira, T.; Louro, A. S.; Costa, H.; Júlio, E. (LNEC | Divisão de Divulgação Científica e Técnica, 2020-11)

O betão com baixa dosagem de ligante (LBC - low binder concrete na denominação anglo-saxónica) e o betão com baixa dosagem de cimento com agregados reciclados (LCRAC - low cement recycled aggregate concrete ) são alterativas ...
Tensile Fracture Mechanism of Masonry Wallettes Parallel to Bed Joints: A Stochastic Discontinuum Analysis

Pulatsu, B.; Erdogmus, E.; Lourenço, P.; Lemos, J. V. (MDPI, 2020-10)

Nonhomogeneous material characteristics of masonry lead to complex fracture mechanisms, which require substantial analysis regarding the influence of masonry constituents. In this context, this study presents a discontinuum ...
Simulation of hurricane Lorenzo at the port of Lajes das Flores, Azores, by using the HIDRALERTA system

SANTOS, M.I.; Reis, M. T. L. G. V.; Pinheiro, L.; Fortes, C. J. E. M.; Zózimo, A. C.; Serrazina, V.; SALVADOR, M.; Azevedo, E. B.; Reis, F. (Instituto Hidrográfico, 2020-11)

HIDRALERTA is a forecast, early warning and risk assessment system for port and coastal areas that uses measurements and estimates of sea-waves and water levels to evaluate overtopping/flooding events. The calculation of ...
Avaliação do galgamento costeiro sem e com um quebramar destacado na frente da praia da Vagueira

Fortes, C. J. E. M.; Neves, M. G.; Capitão, R.; Pinheiro, L. (Instituto Hidrográfico, 2020-11)

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 ...
Validação do protótipo do sistema To-SEAlert para o porto da Ericeira. Depressões Elsa e Fabien

Zózimo, A. C.; Fortes, C. J. E. M.; Pinheiro, L. (Instituto Hidrográfico, 2020-11)

Neste trabalho é efetuada a validação do protótipo To-SEAlert para o porto da Ericeira. Para a validação dos resultados do modelo SWAN foram utilizados os dados de duas boias situadas ao largo da Nazaré e para a validação ...
Behaviour of moored ships in Azorean ports during hurricanes Lorenzo and Elsa

Pinheiro, L.; SANTOS, M.I.; Fortes, C. J. E. M.; Zózimo, A. C. (Instituto Hidrográfico, 2020-11)

This work presents the results of numerical simulations of two ferry ships moored inside two ports of Pico’s Island: São Roque and Madalena, during the recent passage of two major storms in the Northern Atlantic in 2019, ...
Three-dimensional survey in scale model tests of rubble-mound breakwaters. Laser scanning and time of flight methodologies

Lemos, R.; Santos, J. A.; Fortes, C. J. E. M.; Kerpen, N.B. (Instituto Hidrográfico, 2020-11)

The assessment of damage evolution in scale model tests of rubble-mound breakwaters can be achieved by comparing eroded depths and volumes between consecutive surveys. This paper focuses on damage evolution of a model of ...
Estudos complementares no âmbito dos processos de reabilitação ambiental relacionados com a utilização da Base das Lajes pelos EUA - Análise dos resultados da monitorização de águas subterrâneas realizada em 2020

Leitão, T. E.; Antunes, M. L. (2020-12)

O LNEC encontra-se a apoiar o Ministério da Defesa Nacional (MDN) num conjunto de questões técnico-ambientais relacionadas com a presença, nos últimos 60 anos, do contingente da Força Aérea Americana (USAFE) na Base das ...
Precipitation pattern changes impact in the groundwater quality at aluviões do Tejo aquifer

Leitão, T. E.; Henriques, M. J. A. (IWRA, 2020-10)

In order to assess the potential impact that climate changes might have in the future groundwater chemistry, the objective of this study was to evaluate how has the past decade 2000-2009 climatic variations affected the ...
Turbulent flow structure in a vegetated non-prismatic compound channel

Mehraban, F. V.; Mohammadi, M. M.; Ayyoubzadeh, S. A.; Fernandes, J. N.; Ferreira, R. L. (wiley online library, 2020-11)

The presence of vegetation on the floodplains of compound channels affects the structure of mean flow, increases flow resistance and turbulence intensity, and impacts sediment transport. In prismatic compound channels, the ...
Designing Experiments to Study Dam Breach Hydraulic Phenomena

Amaral, S.; Caldeira, L.; Viseu, T.; Ferreira, R. L. (ASCE - American Society of Civil Engineers, 2020-04)

The success of experimental studies to investigate hydraulics of dam breaching requires an adequate specification of geotechnical parameters and control over its realization in field or in laboratory conditions. Although ...
Hydrological risk and associated scour risk: case study sensitivity analysis

Bento, A. M.; Gomes, A.; Couto, L. T.; Pêgo, J. P.; Viseu, T. (Universidade de Coimbra, 2020-10)

Bridge collapses have been a severe problem worldwide, leading to socio-economic disruption and human casualties. The knowledge of the causes and consequent collapse modes have drawn much attention from researchers, which ...
RainfTrends over a Small Island Teleconnected to the North Atlantic Oscillation - the Case of Madeira Island, Portugal

Espinosa L. A.; Portela, M. M. (Springer, 2020-09)

For improving sustainable water resources management and planning at local and regional scales, specifically in small islands, long-term and recent rainfall trends due to temporal shifts in major climatic drivers should ...
Significant Extremal Dependence of a Daily North Atlantic Oscillation Index (NAOI) and Weighted Regionalised Rainfall in a Small Island Using the Extremogram

Espinosa L. A.; Portela, M. M.; Rodrigues, R. (MDPI, 2020-10)

Extremal dependence or independence may occur among the components of univariate or bivariate random vectors. Assessing which asymptotic regime occurs and also its extent are crucial tasks when such vectors are used as ...
Assessing Future Use of Autonomous, Shared and Electric Vehicle Technologies To Meet Decarbonisation Goals: a case study in Lisbon

Arsénio, E.; Romão, M.; Gomes, J.; Prata, J. (Finnish Transport and Communications Agency, 2020-04)

Decarbonisation policy goals are expected to drive significant changes in transport and urban mobility markets. However, future city trajectories that could enable multiple societal benefits from low carbon and zero-emissions ...

Now showing items 1801-1820 of 8548

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