DSpace JSPUI

O Global Navigation Satellite System (GNSS) tem sido amplamente utilizado, a nível mundial, na monitorização de estruturas de engenharia civil. No caso particular das barragens de betão, em que os seus deslocamentos observados são caraterizados por serem de pequena amplitude e de variação muito lenta, a solução GNSS de frequência diária tem sido mais do que suficiente para a monitorização deste tipo de estruturas. Sobretudo quando se compara com a frequência anual das soluções dadas pelos mét...

Waves generated by the wind in oceans and seas have a significant available quantity of clean and renewable energy. However, harvesting their energy is still a chal lenge. The integration of an oscillating water column (OWC) wave energy converter into a breakwater leads to more viability, since it allows working as both harbor and coastal protection and harvesting wave energy. The main objective of this study is to investigate different configurations of L-shaped duct OWC devices inserted int...

O Projeto Life Garachico - Adaptação das zonas costeiras urbanas da Macaronésia às inundações decorrentes das alterações climáticas (Life20 CCA/ES/001641) - objetiva a criação e implementação de uma estratégia flexível para mitigar o risco de inundações costeiras, promovendo a participação de cidadãos e autoridades públicas. O projeto adota uma abordagem holística de risco e introduz critérios para definir níveis de risco aceitáveis pela população e pelos gestores locais.

Since GNSS is a three-dimensional satellite positioning and navigation system, however, it is unusual to monitor dams in the altimetric component with this system, but only in the two horizontal components. Thus, the third component of three-dimensional positioning guaranteed by GNSS is wasted. There are two main reasons to justify this practice: firstly, because vertical positioning with GNSS is around two to three times less precise than horizontal positioning; and secondly, because spirit ...

The Southern Expansion of the Cerro do Lobo Waste Facility, inserted in the Neves-Corvo Copper and Zinc Mining Concession, is located in Baixo Alentejo, district of Beja, covering the municipalities of Castro Verde and Almodôvar, Portugal. During the operational phase, the mining waste will be deposited vertically, in stages. At the same time, the deposition area will expand approximately 10%. This enlargement includes the southern expansion of the tailings dam. This dam will contain waste up...

The ability to anticipate and avoid failures in concrete dams necessarily includes a detailed analysis of the mechanical/hydraulic properties and monitoring data relating to the dam -foundation system, an in-depth analysis of the geometry of the foundation rock mass, complex numerical analysis of dam behaviour and quantitative interpretation models. This ability to assess the safety of the damfoundation system in an integrated way still needs to be improved, namely by incorporating couple...

For the safety assessment of concrete dam-foundation systems this study uses an explicit time-stepping small displacement algorithm, which simulates the hydromechanical interaction and considers the discrete representation of the foundation discontinuities. The proposed innovative methodology allows the definition of more reliable safety factors and the identification of more realistic failure modes by integrating: i) softening-based constitutive laws that are closer to the real behavior iden...

In concrete dam foundations, failure mechanisms are primarily influenced by natural rock discontinuities, the dam-foundation interface, or weaker strata. Instability can manifest beneath the dam, within the abutments, or along adjacent slopes. For arch dam foundations, particular attention is required for failure scenarios involving sliding along weaker surfaces in areas where the arches are supported (along the valley sides and abutments), as well as issues related to seepage at the valley b...

Visual inspection is a crucial task for the assessment of a dam conservation state. However, these tasks are time consuming and operator dependent, which leads to the aim of developing more objective procedures. Photographs are a way to register the conservation state of a structure at a certain epoch, providing a record that can be later reanalysed and compared to new data. Although they are already used for support of inspection activities, their capture is often limited to accessible areas...

Traditional stone masonry walls are structural elements in most historic build- ings. To preserve them and improve their ability to withstand extreme events, such as earthquakes, it is necessary to implement effective reinforcement solutions. This paper presents the modeling of traditional Portuguese rubble stone masonry walls, reinforced with external steel mesh, sprayed micro-concrete layers and transverse confinement by steel connectors, which were developed and tested experimentally ...

Abstract: This paper presents an innovative service for river flow forecasting and its demonstration in two dam-controlled rivers in Portugal, Tejo, and Mondego rivers, based on using Multilayer Perceptron (MLP) models to predict and forecast river flow. The main goal is to create and improve AI models that operate as remote services, providing precise and timely river flow predictions for the next 3 days. This paper examines the use of MLP architectures to predict river discharge using com...

O Projeto “Forte das Memórias” (financiado pelo Programa Europeu EEA Grants) objetiva a revitalização do património (material e imaterial) através da salvaguarda do Forte de Nossa Senhora dos Anjos de Paimogo, Lourinhã (Portugal). Este visa incrementar a cultura comunitária local através da recuperação do conhecimento tecnológico tradicional e da história do lugar. A investigação que está a ser levada a cabo assenta numa dinâmica de interação comunitária que possibilitará dar a conhecer, em c...

The Forte das Memórias (Coastal Memory Fort) project aims to revitalise tangible and intangible heritage through the safeguarding of the 17th century fort of Nossa Senhora dos Anjos de Paimogo, Lourinhã (Portugal). Located on the cliffs of Paimogo Beach – a place marked by the historical landing of the Duke of Wellington’s forces during the Napoleonic Wars – the fort stands as a prime example that brings together the best of Portuguese military architecture of former eras. The project endeavo...

In the digital age, preserving intangible cultural heritage holds paramount importance. This proposal delves into the synergy of cultural preservation and digital innovation, focusing on the coastal region's intangible heritage. We present a pioneering approach to curate and disseminate untold stories through immersive digital narratives. Our project integrates interactive multimedia elements within a proposed coastal memory fort, fostering engagement and learning. The narrative design encaps...

The Barbarie spit (Langue de Barbarie) is a 100–400 m-wide West-Africa coastal barrier that has fluctuated in length between 10 and 30 km over the last century (Anthony, 2015). The changes in length reflect the variable position of the Senegal river mouth, where rates of spit growth vary greatly (100 to 700 m/year), depending on variations in wave characteristics, river discharge and river mouth dynamics, combined with barrier-breaching events (Bergsma et al., 2020). The Barbarie sandy barr...

ShorelineS is a recent coastline evolution model allowing for extreme coastline curvatures and spit formation at high-angle wave incidence. This paper investigates ShorelineS’s capabilities in reproducing longshore sediment rates, spit elongation and inlet migration, such as those observed at Langue de Barbarie, in Senegal. Moreover, it addresses the influence of the sediment transport formulation and other model parameters on the representation of shoreline instabilities downdrift of the Sen...

Road pavements are vital for transportation infrastructure, yet they deteriorate over time due to traffic loads and environmental factors, resulting in cracks and damage. This paper introduces an innovative method for crack detection on road pavements using digital imagery. Our approach incorporates geo-localization, annotates, characterizes, and quantifies crack severity. This empowers experts to monitor crack progression, a critical element in pavement management. The methodology allows for...

The concept of 15-min cities has recently received a lot of attention in recent research. However, the clear definition of a measurement for this concept has not yet been done at a neighborhood and city level across all continents and encompassing topological constraints. Yielding the question if 15 min is even the right indicator. In this study, we propose a method for determining how closely a city adheres to this concept using Open Data. We also propose an optimized method for generating c...

Rivers are among the most endangered ecosystems in the world, although they play a fundamental role in the urban environment, for public health and wellbeing. The role of rivers in the production of urban spaces is one of the research strands within the scope of the Ibero-American Network RUN | Naturalized Urban Rivers (CYTED - www.run.ulusofona.pt). RUN combines knowledge and experiences about the regeneration processes of rivers under strong pressure in urban areas with nature-based solut...