153 documents found, page 1 of 16

Fortnightly variability of the lateral structure of residual flows along non-ro...

Residual circulation in estuaries plays a crucial role in controlling salt intrusion, material transport, and ecosystem functioning, making its understanding essential for coastal management worldwide. Despite its importance, the mechanisms driving the transverse structure of residual flows remain insufficiently explored, particularly in relation to the fortnightly tidal variability. This study shows how the ma...

Mosaic.pt flood risk framework to support management in coastal zones

Operational forecast framework applied to extreme sea levels 1 at regional and ...

The design, implementation and demonstration of a novel and generic computational forecast framework for multi-scale prediction of extreme sea levels and associated flooding is presented. Denoted Water Information Forecast Framework (WIFF), it integrates process-based models for waves, tides and surges from regional to local scales, predicting the flooding of coastal areas, and supporting the routine and emerge...

Online monitoring in the Tagus estuary: Parque das Nações station - Installatio...

This report describes the design and installation of the Parque das Nações online monitoring station and the procedures relative to its maintenance and data verification undertaken between January 2016 and February 2017. This station is equipped with a SEBA MPS D3 multiparameter probe, which measures water levels, conductivity and water temperature, and a SEBA Slimcom2 data logger, for data acquisition and tran...

An oil risk management system based on high-resolution hazard and vulnerability...

A new oil risk management system is proposed herein. Risk is computed in a quantitative way, combining a detailed hazard maps generated with a process-based oil spill model over an unstructured computational grid, and a spatially detailed methodology for vulnerability analysis. The system has a web interface that serves as a single point of access to both emergency-driven and risk-management products. The syste...

Storm-induced marine flooding: lessons from a multidisciplinary approach

There is a growing interest for marine flooding related to recent catastrophic events and their unintended consequences in terms of casualties and damages, and to the increasing population and issues along the coasts in a context of changing climate. Consequently, the knowledge on marine flooding has progressed significantly for the last years and this review, focused on storm-induced marine submersions, respon...

Análise de sensibilidade à incerteza dos forçamentos na previsão da qualidade d...

Os sistemas de previsão e monitorização em tempo real constituem ferramentas inovadoras para a gestão otimizada da água em meios estuarinos e costeiros. O LNEC desenvolveu uma plataforma para a gestão em tempo real dos meios aquáticos, baseada na WIFF – Water Information and Forecast Framework. Esta plataforma foi recentemente alargada para a previsão da qualidade da água no estuário do Tejo. O sistema de previ...

Salinity evolution in the Tagus estuary relative to climate change

Climate change represents a potential threat for estuaries, via potential landward intrusion of saltwater, inundation of low-lying areas, acceleration in the nutrients cycling and disruption of aquatic ecosystems. The Tagus estuary, one of the largest estuaries in Europe, holds a major natural reserve and supports diverse activities, some of which may be negatively affected by the landward intrusion of saltwate...

Non-linear infra-gravity and sea-swell wave-wave interactions at S. Jacinto beach

Non-linear wave-wave interactions between sea-swell waves (0.5 < f < 0.04 Hz) and infragravity waves (0.04 < f < 0.004 Hz) are studied in detail from field data using bispectral analysis. This methodology allowed to understand the direction and magnitude of the non-linear energy transfers within the spectrum. Field measurements of pressure data were collected at S. Jacinto beach during a full tidal cycle on a c...

Project Molines: Modelling floods in estuaries. From the hazard to the critical...

The final technical report of the project “MOLINES - Modelling floods in estuaries. From the hazard to the critical management” (ref. PTDC/AAG-MAA/2811/2012) is presented. The project was funded by the Portuguese Foundation for Science and Technology (FCT - Fundação para a Ciência e a Tecnologia) and took place between 2013 and 2016. The MOLINES project aims at improving knowledge on estuarine margins inundatio...