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DHA/NRE - Comunicações a congressos e artigos de revista: Recent submissions

Now showing items 61-80 of 458

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 ...
Historical framekwork on dams. General history of ancient dams, largest and historic failures of embankment dams

Amaral, S.; VALENTE, S.; Viseu, T.; Ferreira, R. L. (LNEC, 2020-09)

Dams have practically been around since human civilization. While modern dams are built for hydroelectric purposes, ancient dams were built to flood prevention and water irrigation providing. In the past, the sparse knowledge ...
Transient-Flow Induced Compressed Air Energy Storage (TI-CAES) System towards New Energy Concept

Besharat, M.; Dadfar, A.; Viseu, T.; Brounone, B.; Ramos, H. (MDPI, 2020-02)

In recent years, interest has increased in new renewable energy solutions for climate change mitigation and increasing the efficiency and sustainability of water systems. Hydropower still has the biggest share due to its ...
Risk-based methodology for scour analysis at bridge foundations

Bento, A. M.; Gomes, A.; Viseu, T.; Couto, L. T.; Pêgo, J. P. (Elsevier, 2020-07)

The collapse of bridges inevitably leads to economical losses and may also be responsible for human fatalities. A bridge may fail due to several reasons, with local scouring around its foundation being the most common. ...
Evaluation of the European Legislative Framework in Assessing the Vulnerability of Surface and Groundwater Bodies to Road Runoff

Martins, T.; Leitão, T. E.; Lundy, L. (VTGU Press, 2020-05)

This article presents an overview of the current European practices with regards to protecting surface water and groundwater bodies, in what concerns the application of legislation to protect water resources and to evaluate ...
Large Scale Soil-Aquifer-Treatment (SAT-MAR) Physical Model Experiments to Improve Water Quality

Leitão, T. E.; Martins, T.; Henriques, M. J. A.; Lobo Ferreira, J. P. C. (VGTU Press, 2020-05)

The effluents from agriculture practices usually contain several contaminants creating an environmental concern to downgradient water bodies. The use of SAT systems to improve the effluents water quality, during the transport ...
Assessment of CFD Solvers and Turbulent Models for Water Free Jets in Spillways

Muralha, A.; Melo, J.; Ramos, H. (MDPI, 2020-06)

The capability of two different OpenFOAM® solvers, namely interFoam and twoPhaseEulerFoam, in reproducing the behavior of a free water jet was investigated. Numerical simulations were performed in order to obtain the ...
Experimental methods for local-scale characterization of hydro-morphodynamic dam breach processes. Breach detection, 3D reconstruction, flow kinematics and spatial surface velocimetry

Amaral, S.; Viseu, T.; Ferreira, R. L. (Elsevier, 2019-11)

A set of tests on failure by overtopping of earth dams was performed under hydraulic and geotechnical controlled conditions in a medium-scale facility located at the Portuguese National Laboratory for Civil Engineering. ...
A circular cylinder in the main-channel/floodplain interface of a compound channel: effect of the shear flow on drag and lift

Gymnopoulos, M.; Ricardo, A. M.; Alves, E.; Ferreira, R. L. (Taylor & Francis, 2019-06)

The interface between the main channel and the floodplain of a compound channel is often populated by trees or buildings that normally remain emergent during floods. This study investigates how drag on an emergent cylinder ...
Modelos para previsão de poluição em águas de escorrência de estradas

Galhardo, D.; Fernandes, J. N.; Barbosa, A. E.; Coelho, P. S. (Centro Rodoviário Português, 2019-05)

O presente trabalho está relacionado com a previsão da qualidade das águas de escorrência rodoviárias. Partindo de informação sobre um conjunto de 20 estradas europeias (incluindo configuração da via, tráfego e condições ...
Effects of non-uniform flow in the mixing layer in compound channels

Fernandes, J. N. (European Water Resources Association, 2019-06)

The alluvial valleys of rivers usually have a compound channel cross section during flood events. This configuration leads to much more complex flow mechanisms when compared to a single channel flow namely with the existence ...
Análise de sensibilidade à geometria do canal piloto na rotura de barragens por galgamento

Alvarez, T.; VALENTE, S.; Amaral, S.; Viseu, T.; Ferreira, R. L. (Instituto Superior de Engenharia do Porto, 2019-02)

O presente trabalho consiste na comparação de dois ensaios experimentais de rotura por galgamento de barragens de aterro homogéneas realizados em condições idênticas de composição do solo (mesma curva granulométrica), ...
Técnicas de análise e pós-processamento de imagem aplicada à extração de dados locais de ensaios de rotura de barragens

Amaral, S.; Alvarez, T.; Viseu, T.; Ferreira, R. L. (Instituto Superior de Engenharia do Porto, 2019-02)

balho, de índole experimental, baseia-se na adoção de técnicas de análise e pós-processamento de imagem para a extração de dados de ensaios de rotura por galgamento de barragens de aterro ...
Large scale soil-aquifer-treatment (SAT-MAR) physical model experiments to remove rice paddy field contaminants

Leitão, T. E.; Martins, T.; Henriques, M. J. A.; Lobo Ferreira, J. P. C.; Rogeiro, J.; Ilie, A. M. C. (IAH - International Association of Hydrogeologists, 2019-05)

The effluents from agriculture practices usually contain several contaminants creating an environmental concern to downgradient water bodies. The use of SAT systems to improve the effluents water quality, during the transport ...
Estudos sobre a reutilização de águas residuais tratadas para gestão da recarga de aquíferos

Leitão, T. E.; Martins, T.; Mesquita, E.; Henriques, M. J. A.; Carvalho, T.; Rosa, M. J.; Lobo Ferreira, J. P. C. (APRH, 2019-09)

Os efeitos das alterações climáticas na intensidade e duração da precipitação têm conduzido a eventos extremos cada vez mais recorrentes de escassez de água mas também de inundações. Neste contexto, a adoção de estratégias ...
Influência do teor de humidade na rotura de barragens de aterro por galgamento

Alvarez, T.; VALENTE, S.; Amaral, S.; Viseu, T.; Ferreira, R. L. (APRH, 2019-09)

O presente trabalho consiste na comparação de dois ensaios experimentais de rotura por galgamento de barragens de aterro homogéneas com diferentes teores de humidade. As barragens foram construídas em condições idênticas ...
Impacts of climate change on groundwater – results from the BINGO project

Novo, M. E.; Oliveira, M. M.; Martins, T.; Henriques, M. J. A. (IAH - International Association of Hydrogeologists, 2019-09)

Climate change impacts on groundwater usually take a longer time-lag to occur than in surface water resources, depending on the inertia of the aquifer, which are further enlarged by land use changes, population growth, ...
Experimental flow characterization in a spiral vortex drop shaft

Fernandes, J. N.; Jónatas, R. (IWA Publishing, 2019-07)

Connecting storm-sewers located at rather different elevations may be made with vortex drop shafts in which the energy dissipation is made by the friction between the vertical shaft and the flow and downstream by the ...

Now showing items 61-80 of 458

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