Departamento de Hidráulica e Ambiente: Recent submissions

Now showing items 101-120 of 4446

Guiding principles for geospatial MAR feasibility mapping

Stefan, C.; Martins, T.; Chkirbene, A.; Khemiri, K.; Panagiotou, C.F.; S. Ghannem; Bergillos, R.; Ebrahim, G.Y. (ASCE, 2025-04-30)

An abundance of studies is published on regular basis on mapping the spatial suitability of managed aquifer recharge (MAR) using a GIS-based multi-criteria decision analysis (MCDA). Such studies are apparently easy to ...
A CFD Account of the Mean Flow and Turbulence over Breached Embankment Dam

Ferreira, R.; Alvarez, T.; Viseu, T.; Martins, N.M. (LNEC, 2025-04-13)

We measure and compute the flow over a breached dam, identifying the main topological features of the mean flow (separation and stagnation surfaces, attached vortexes), secondary currents and boundary layer development. The ...
Sustainable Reservoir Operation: Balancing Power Generation and Downstream Environmental Maintenance - The Case of the Cahora Bassa Dam

Guale, R.; Carvalho, E.; Alves, E. (LNEC, 2025-04-14)

The Cahora Bassa dam is one of the largest hydropower plants in the Southern Africa region, under the Zambezi River Basin, in Mozambique territory. The independent and standalone operation of the Cahora Bassa reservoir ...
Analysis of the Influence of Manning's Coefficient in Dam Failure Flood Simulations Using Remote Sensing Data

Salgado, S.R.; Carvalho, E.; Viseu, T.; Oliveira, O.F. (LNEC, 2025-04-14)

Dam failures pose significant risks to both life and infrastructure, making precise flood simulations essential to mitigate their impacts. This study investigates the influence of Manning's roughness coefficient on dam ...
Flow Interaction at Multistage Floodplains of Open Channel during High Flow: A Study of Mixing Length and Flow Structures

Singh, P.K.; Tang, X. (ASCE, 2025-08-12)

Understanding compound open channels with separate shallow floodplains and different bankfull heights around the deep main channel is of paramount mportance. A practical design of channels and rivers in urban environments, ...
A semi-analytical model for the velocity profile in an open channel with suspended rigid vegetation

Tang, X.; Singh, P.K.; Rahimi, H. (Elsevier, 2025-07-07)

Aquatic suspended vegetation increases a significant flow resistance at the water surface, resulting in a hyperbolic-type velocity distribution in the gap between the vegetation and bed, similar to the flow in a channel ...
A Detailed Safety and Risk Assessment of Massingir Dam

Sardinha, R.; Melo, J.; Pimenta, L.; Duarte, A.; Freitas, R.M.; Juízo, D.; Martins, A.; Miguel, F.; Cuna, I.; Mabunda, L. (LNEC, 2025-04-15)

At the request of the Mozambican Directorate of Water Program (DNGRH) and as part of the National Climate Resilience Program, a study aimed to evaluate the current safety of the Massingir dam and downstream valley was ...
A Detailed Safety and Risk Assessment of Pequenos Libombos Dam

Melo, J.; Sardinha, R.; Pimenta, L.; Duarte, A.; Freitas, R.M.; Juízo, D.; Martins, A.; Sengo, D.; Timba, J.; Mabunda, L. (LNEC, 2025-04-16)

At the request of the Mozambican National Directorate of Water Program (DNGRH) and as part of the National Climate Resilience Program, a study aimed to evaluate the current safety of the Pequenos Libombos dam and downstream ...
Utilização de lodo de ETE: licenciamento como oportunidade, simplificação como desafio

Santos, M. R. R.; Barbosa, A. E.; Cruz, L.M.O (Associação Brasileira de Avaliação de Impacto – ABAI, 2025-10-23)

As estações de tratamento de esgoto (ETE), fundamentais para a manutenção e promoção da qualidade do meio ambiente e da saúde humana, geram em seus processos o chamado lodo. Este subproduto corresponde a uma mistura que ...
Development of the combined fish pass of Fratel’s dam using numerical and physical modelling

Melo, J.; Mendes, L. S.; Muralha, A.; Pinto , P.; Oliveira, J.M.; Carvalho, L.B.; Almeida, P.R.; Quintella, B.; Alexandre, C.M.; Rato, A.S. (LNEC, 2025-04-13)

In 2025, EDP, Portugal’s leading energy production and distribution company, will carry out intervention at the Fratel Hydroelectric Scheme on Tagus River, to improve the power production efficiency and to provide migratory ...
Influence of land use and land cover datasets on dam-break modeling in the semiarid region of Brazil

Salgado, S.R.; Carvalho, E.; Viseu, T.; Oliveira, O.F. (Springer, 2025-07-10)

Accurate estimation of Manning’s roughness coefficient is critical for reliable hydraulic modeling of dam-break floods. However, for this type of accident, the lack of historical flood data makes the definition of Manning’s ...
Behaviour of 22 Emerging Organic Compounds from Secondary Treated Wastewater Effluent in Soil Aquifer Treatment – Assessing the Attenuation Potential of Biochar and Compost Reactive Layers in a Large-Scale Sand Tank Experiment

Horovitz, M.; Muñoz-Vega, E.; Abdighahroudi, M.S.; Leitão, T. E.; Schüth, C.; Schulz, S. (EGU, 2025-08-07)

Soil aquifer treatment (SAT) using secondary treated wastewater effluent (STWW) as infiltration feedwater is an increasingly discussed measure to mitigate groundwater level decline. It may also act as an additional treatment ...
From ML2 to ML2+: Integrating Time Series Forecasting in Model-Driven Engineering of smart IoT Applications

Korani, Z.; Challenger, M.; Moin, A.; Ferreira, J.; Silva, A.; Jesus, G.; Alves, E.; Correia, R. (SCITEPRESS, 2025-02-26)

Time-series forecasting is essential for anomaly detection, predictive maintenance, and real-time optimization in IoT environments, where sensor data is sequential. However, most model-driven engineering (MDE) frameworks ...
Obtenção automática da relação entre cota-área inundada-volume armazenado de albufeiras

Pimenta, J.; Fernandes, J. N. (APRH, 2025-04-10)

A qualidade da gestão dos recursos hídricos está diretamente relacionada com a capacidade de monitorizar e estimar o volume de albufeiras. As suas características geométricas desempenham um papel fundamental neste processo, ...
A comunicação como ferramenta multidisciplinar na promoção da resiliência da sociedade a eventos extremos de precipitação

Barbosa, A. E. (APRH, 2025-05-27)

Para aumentar a resiliência das comunidades a eventos extremos de precipitação é necessário ter conhecimentos sólidos e consistentes sobre os cenários de precipitação e as vulnerabilidades. Todavia, este conhecimento de ...
Pathways to Sustainability Require Collaboration and Innovation. Arguments for the Inclusion of Communication Competences in Environmental Sciences and Related Higher Education

Barbosa, A. E. (Bentham Open - Bentham Science, 2025-07-29)

Introduction: Steps towards sustainability require an evaluation of the interconnections among environmental, social, and economic factors. To address global societal and environmental challenges, distinct actors employ ...
Developing a remote sensing tool for reservoir volume evaluation

Pimenta, J.; Fernandes, J. N.; Azevedo, A. (LNEC, 2025-04-16)

The efficient management of water reservoirs is crucial for ensuring water security, flood control, and hydroelectric power generation. Accurate reservoir volume measurements are essential for optimizing these functions. ...
Numerical Analysis of the Performance of a Dual-Chamber OWC Wave Energy Converter Integrated into a Vertical Breakwater

Didier, E.; Teixeira, P. (IJOPE, 2025-12-04)

Performance of a novel dual-chamber Oscillating Water Column (OWC) wave energy converter device, composed of two separated chambers, with independent entrance and a Wells turbine, is analyzed for incident regular waves. ...
Da tradição à inovação: a revolução da modelação física e CFD na engenharia hidráulica

Mendes, L. S.; Muralha, A.; Melo, J.; Alves, E.; Viseu, T. (APRH, 2025-04-09)

O núcleo de Recursos Hídricos e Estruturas Hidráulicas do Laboratório Nacional de Engenharia Civil (LNEC) modernizou o procedimento de avaliação do desempenho de estruturas hidráulicas. A nova metodologia, denominada ...
Modelação numérica da interação onda–estrutura usando modelos rans: a importância dos modelos de turbulência

Didier, E.; Teixeira, P. (Pianc, 2025-11-06)

Os modelos de turbulência usados em modelos do tipo Reynolds-Averaged Navier-Stokes (RANS) aplicados em problemas de interação onda-estrutura necessitam modelar os escoamentos turbulentos complexos que se desenvolvem ...

Now showing items 101-120 of 4446

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