Tanya Silveira- PhD in Geology
- Portuguese Sea and Atmosphere Institute
Tanya Silveira
- PhD in Geology
- Portuguese Sea and Atmosphere Institute
About
74
Publications
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518
Citations
Introduction
Current institution
Additional affiliations
February 2017 - August 2020
September 2003 - December 2007
IMAR Marine and Environmental Research Centre | FCUL
Position
- Researcher
Description
- Coastal geologist in the Environmental Evaluation and Monitoring project of the Troiaresort (Tróia, Portugal)
September 2016 - present
Position
- Professor (Assistant)
Description
- Oceanografia / Oceanography Licenciatura em Tecnologias do Ambiente e do Mar
Publications
Publications (74)
A rede Argo é uma infraestrutura de observação do oceano que integra, atualmente, aproximadamente 4000 flutuadores autónomos e derivantes dispersos pelo oceano, com o objetivo de medir um conjunto de propriedades da água do mar. Desde 1998, os core Argo medem a temperatura e salinidade ao longo da coluna de água até aos 2000 m de profundidade, tran...
A reconhecida necessidade de aumentar o conhecimento científico sobre o oceano tem vindo a potenciar o investimento no desenvolvimento e instalação de plataformas autónomas de observação que permitam monitorizar e melhor compreender os fenómenos oceanográficos. As novas tecnologias (fontes de energia, meios de comunicação e capacidade de armazename...
The Atlantic dimension of Portugal, with c. 1,700,000 km² maritime area, led to the prioritization of the European Multidisciplinary Seafloor and water column Observatory - Portugal (EMSO-PT) in the national scientific infrastructures’ roadmap. In this work we present the EMSO-PT initiative: a research consortium joining 15 research institutions, w...
Ocean observation has seen a rapid evolution and has become crucial in providing the much needed data and information toward a well-supported and accurate description of ocean processes which influence the environmental, economic, and societal systems. There has been a significant progress in technologies which have enabled the expansion of the sam...
A importância da monitorização costeira é largamente reconhecida pelas entidades competentes pela gestão do litoral e comunidade técnica-científica. O Programa de Monitorização da Faixa Costeira de Portugal Continental (COSMO), foi criado para garantir a aquisição de dados objetivos e sistemáticos sobre a evolução do litoral a uma escala espácio-te...
A Agência Portuguesa do Ambiente, I.P., enquanto entidade gestora do litoral, desenvolveu o projeto CHIMERA com o objetivo de realizar trabalhos de reconhecimento sedimentar, morfológico e de caraterização físico-química de potenciais manchas de empréstimo na plataforma continental. Apresenta-se sumariamente os resultados obtidos, os quais são fund...
No âmbito do desenvolvimento e implementação de um Programa Global de Monitorização Sistemática da Zona Costeira de Portugal Continental, o Núcleo de Monitorização Costeira e Risco (NMCR), procede à coordenação, desenvolvimento e operacionalização da recolha e partilha de dados de monitorização, contribuindo assim para o conhecimento sobre os proce...
The CHIMERA project, contracted by the Portuguese Environment Agency (APA) and co-funded by the European Union Cohesion Fund (Portugal 2020 | POSEUR) intended to characterize the sedimentary record of three 10 km2 areas and one 5 km2 area in the Portuguese inner shelf. Multibeam bathymetry and backscatter, parametric echo-sounder, ultra-high resolu...
This report briefly describes the most important aspects in the planning and execution of
artificial beach nourishment and provides a retrospective of the interventions carried out along the shoreline of mainland Portugal from 1950 until 2017.
The objectives, type of deposition and geographic distribution of this type of interventions are described...
Beaches occur when sediment is available and where accommodation space exists for the sediments to settle and accumulate. Beaches that occur within one coastal cell share the same oceanographic forcing climate, essentially related to waves and tides, and the same distribution and intensity of sources and sinks of sediment. However, contrasting beac...
Public understanding of coastal dynamics and evolution is of vital importance in supporting the implementation of sustainable coastal management. However, successfully delivering scientific information to the general public is a challenging task. Here we describe " The Beaches of Cascais: past and present " science-based exhibition, aimed at upstre...
O presente trabalho visa sintetizar e atualizar a informação atualmente existente neste troço costeiro entre 2007 e 2014, com o objetivo de caraterizar as principais alterações morfológicas, tendências evolutivas e eventuais alterações no balanço sedimentar entretanto ocorridas nesta célula costeira, de modo a contribuir para a tomada de decisão e...
Coastal overwash is one of the most important hazards affecting the coastal zone and therefore has been the focus of several studies related to the establishment of setback lines. However, studies of extreme overwash (EO) events along urban beaches backed by a seawall or structure are scarce, and reveal the difficulties associated with its assessme...
Geoindicators are used to describe reference situations and measure changes and trends in physical environment over time. They provide a simplified form to communicate complex data and information, and constitute a facilitator mechanism in the dialog among stakeholders. In this work, a review on the use of geoindicators in sandy coastal environment...
The ongoing evolution of the coastal zone under the influence of sea-level rise, decreasing sediment supply, and human manipulation has led several Federal agencies to embark on a program of coastal monitoring to track vectors of change within their coastal holdings. Starting two decades ago, the Northeast Region of the National Park Service began...
Resumo: Neste trabalho avaliou-se o sinal e a magnitude da deriva litoral no arco Caparica-Espichel, recorrendo a seis estratégias de modelação. Os resultados mostram a necessidade de adotar estratégias de modelação que considerem explicitamente as relações retroativas entre a evolução da faixa costeira e o forçamento oceanográfico, utilizando um m...
Pinto C, Taborda R, Silveira T, 2014. Alimentação artificial das praias da Costa da Caparica. Síntese dos resultados da monitorização (2007 a 2014). Contributo para o Grupo de Trabalho do Litoral (Anexo VI). pp 213-237.
http://www.apambiente.pt/_zdata/DESTAQUES/2015/GTL_Relatorio%20Final_20150416.pdf
Persistent erosion at Plumb Beach, New York, USA, has been countered by a series of isolated actions to stabilize the shoreline. Sediment placed at the erosion site has quickly been removed and re-deposited in downdrift locations to the detriment of the existing habitats. In a renewed effort to better understand the dimensions of change at Plumb Be...
The understanding of the sedimentary links in headland-bay beaches is a major issue in the assessment of beach sedimentary budget. The present work aims to contribute to the knowledge of this process taking as a case study a rocky coastal stretch of the Portuguese west coast (from Peniche to Raso cape). This study builds on a multidisciplinary appr...
The Tróia Roman ruins, which are located along the Sado estuary’s shoreline, have been experiencing erosion due to the action of the tides, and due to its exposure to local wave action induced by the northerly winds acting on the estuary. Despite small in intensity, the hydrodynamic processes acting upon the beach are persistent and are leading to...
Christina storm hit the Portuguese coast on January 2014 and was characterized by strong winds, high and long sea waves and intense rainfall. This work aims to characterize and evaluate the effects of the Christina storm on the morphology of cross-shore profiles describing the beaches of central western coast of Portugal. The storm lashed the Portu...
In the winter of 2006/2007 approximately 200,000 m3 of high quality sand from the dredging of the local marina were placed at the ocean-side beaches in the vicinity of a tourism development in Tróia, Portugal. The beach-quality sediment provided a source of “sand of opportunity” which was used to increase the dry-beach width of the highly used coas...
The development of coastal monitoring programs is essential to support science-based decision making, and these have been increasingly referenced as useful tools for adequate shoreline management. However, long-term maintenance of these programs is often compromised because they are generally science-oriented, oversized and overlook the more practi...
Disponível em:
http://www.apambiente.pt/_zdata/Politicas/Agua/Ordenamento/SistemaMonitorizacaoLitoral/E_1.4.2.1.a%20CapacidadeDeOcupacao.pdf
Disponível em:
http://www.apambiente.pt/_zdata/Politicas/Agua/Ordenamento/SistemaMonitorizacaoLitoral/E_2.4.a_Galgamento_oceanico.pdf
Disponível em:
http://www.apambiente.pt/_zdata/Politicas/Agua/Ordenamento/SistemaMonitorizacaoLitoral/E_1.1.7.d_Deriva_litoral.pdf
Disponível em:
http://www.apambiente.pt/_zdata/Politicas/Agua/Ordenamento/SistemaMonitorizacaoLitoral/E_1.2.2.2.b_Linha%20de%20costa_CC.pdf
Disponível em:
http://www.apambiente.pt/_zdata/Politicas/Agua/Ordenamento/SistemaMonitorizacaoLitoral/E_1.2.3.c_Ferramentas%20de%20monitorizaao.pdf
Disponível em:
http://www.apambiente.pt/_zdata/Politicas/Agua/Ordenamento/SistemaMonitorizacaoLitoral/E_1.3.2.a_Galgamento_oceanico.pdf
Disponível em:
http://www.apambiente.pt/_zdata/Politicas/Agua/Ordenamento/SistemaMonitorizacaoLitoral/E_1.4.2.2.c_Estudo_LMPMAVE.pdf
Disponível em:
http://www.apambiente.pt/_zdata/Politicas/Agua/Ordenamento/SistemaMonitorizacaoLitoral/E_2.2.c_Morfodinamica%20sazonal.pdf
The development of coastal monitoring programs is essential to support science-based decision making, and these have been increasingly referenced as useful tools for adequate shoreline management. However, long-term maintenance of these programs is often compromised because they are generally science-oriented, oversized and overlook the more practi...
1. Introdução O POOC Sintra-Sado, em vigor desde 2003, inclui o troço costeiro de São João da Caparica (SJC) (Costa da Caparica – Portugal), com 1.3km de extensão no qual foi considerada uma faixa de risco (FRLBA) projetada a 50 anos, cartografada sobre levantamento de 1999, com o objetivo de absorver a erosão expectável no horizonte temporal defin...
The basic geomorphological model of processes acting upon sediment to produce a morphological response is the foundation for restoration of the coastal foredune. Conceptionally, the provision of sediment to the site of foredune development is at the core of foredune restoration. Other approaches to foredune development incorporate rehabilitation of...
In any study design, the surveying approach should match the objectives, thereby limiting the effort to focus on the purpose of the inquiry. Often, in beach geomorphological research, study design is based on expert judgment, that does not assure the optimization of the field surveys. In this study, several dimensions of survey strategies were eval...
É consensual que a gestão da zona costeira deve ser suportada no conhecimento científico. No entanto, a integração deste conhecimento no processo de gestão é geralmente efetuada de forma casuística e, frequentemente, em contextos reativos. Esta situação deve-se, entre outros aspetos, à dificuldade de comunicação entre os gestores e os investigadore...
Resumo As entidades gestoras do litoral reconhecem, cada vez mais, a necessidade de integrar o conhecimento científico nos planos de ordenamento e gestão do território. No entanto, este conhecimento é subaproveitado sendo geralmente utilizado de forma casuística e pouco consistente. Para tal, concorrem, entre outros fatores, falhas de comunicação e...
Coastal Topography was ranked as one of the top variables for monitoring following a review of
Vital Signs in the coastal parks of the Northeast Coastal and Barrier Network. Changes in coastal
topography, whether caused by erosion or accretion, vary both spatially and temporally.
Understanding these variations is key to early recognition of potenti...
Resumo: Está em curso, desde o início de 2011, um programa de amostragem de alta frequência em praias representativas do troço litoral sob jurisdição da Administração da Região Hidrográfica do Tejo, no âmbito do projecto para a criação e implementação de um sistema de monitorização no litoral na área de jurisdição daquela entidade. A aquisição de d...
The human interference within the coastal zone is usually associated with negative impacts, such as promoting or accelerating coastal erosion. This perception results from the innumerous cases worldwide where the arti-ficialization of large stretches of coastline, with the loss of irreplaceable natural values, was unable to solve the background ero...
Complex dynamism of the coastal landscape results
from the interaction between aquatic and terrestrial
ecosystems. Here we show an example of a complex
landscape in La Mancha coastal lagoon in the central
region of the State of Veracruz, Mexico. The inlet of
this lagoon closes periodically because of the alongshore
transport of sediment. When it is...
The human interference within the coastal zone is usually associated with negative impacts, such as promoting or accelerating coastal erosion. This perception results from the innumerous cases worldwide where the arti-ficialization of large stretches of coastline, with the loss of irreplaceable natural values, was unable to solve the background ero...
adjacent communities in identifying natural and cultural resources at risk and adaptation strategies to address the concerns. In the first meeting of its kind in the Northeast, the Gateway National Recreation Area of the National Park Service and NOAA’s Jacques Cousteau National Estuarine Research Reserve involved seven communities in a workshop on...
Tróia peninsula, located on the western coast of Portugal, is undergoing tourism development, including construction of a marina. The marina basin was created by dredging a coastal stretch on the northern terminus of the peninsula on the estuarine side, making available beach-quality sediment for nourishment. A study was carried out to identify pot...
The application of rigorous protocols to conduct shoreline surveys in the Assateague Island National Seashore of the Northeast Coastal and Barrier Network of the National Park Service has generated a dataset that permits comparisons of shoreline positions at seasonal, annual, and long-term scales. The end product of the comparisons provides insight...
The US National Park Service and the US Fish & Wildlife Service have joined forces in monitoring the
geotemporal elements of their coastal land holdings. They have adopted a common protocol for tracking the
position of the shoreline, 1-D, in and adjacent to their lands, as well as adopting a common method for collecting profiles, 2-D, and 3-D eleva...
All coasts are undergoing change and the challenge is to establish
dimensions of the change and to use the information to create informed
decision-making. In the northeastern region of the US, the National Park
Service (NPS) and the US Fish & Wildlife Service (FWS) have
undertaken a monitoring program to rigorously gather coastal
geomorphological d...
The predictions for coastal change under the scenario of global sea-level rise offer impending disaster for the variety of
coastal morphologies, their associated habitats, and the accompanying infrastructure. However, the predictions tend to ignore
the role of sediment budget in the maintenance of coastal morphology and the dynamics of sediment tra...
Following a review of Vital Signs in the coastal parks of the Northeast Coastal and Barrier
Network, knowledge of shoreline change was ranked as the top variable for monitoring.
Shoreline change is a basic element in the management of any coastal system because it
contributes to the understanding of the functioning of the natural resources and to t...
The habitats of La Mancha Lagoon, located midway along the coast of Veracruz, Mexico, are responding to the change of sediment
supply reaching its primary inlet at the Gulf of Mexico. Until several decades ago, an abundant alongshore supply of sediment
created a periodic opening and closing of the La Mancha inlet. The hydrologic regime of the lagoo...
The foredune crestline is a geomorphological feature that shifts in response to sediment budget. Its position in the beach-dune profile is much more conservative than the variation in shoreline position or any other element in the response signature. A comparison of foredune crestline position covering a span of 29 years reveals spatial variation i...
The coastal geomorphological processes of alongshore transport and tidal currents are interacting with
the attendant influences of sea-level rise and sediment supply to generate morpho-sedimentary units in selected estuarine systems. Constrained by the conditions promoted by microtidal situations in barrier island settings, vectors of sediment tran...
Beaches in fetch-restricted estuarine settings are often aligned orthogonal to the direction of greatest fetch and they function as systems that have little alongshore transport or exchange. This situation is tested in a portion of the bayside of Sandy Hook, New Jersey, on a 1.4 km stretch of beach. The beach is divided into segments by engineering...
A part of the preparation for a new General Management Plan (GMP) to guide the Fire Island National Seashore is to identify and address significant issues and changes facing the park. This paper has been prepared to provide the GMP planning team with relevant natural resource information in a professionally-synthesized format addressing the current...
The relative abundance of the different heavy mineral species may be used as a tool to deduce the provenance signal
of the sediment and the dominant transport mode that occurred just prior to sedimentation. In this work, the
sedimentary infilling of the Douro estuary was analysed using Principal Components Analysis (PCA) in order to
characterize th...
A study on the stratigraphic succession of
the sedimentary record of Douro estuary is being
carried out aiming at the recognition and distinction of
the environmental changes, which have occurred
during the Late Quaternary. Some results obtained on
the sedimentology, carbonates, organic matter,
mineralogy, foraminifera, nannoplankton and pollen
ass...
The multidisciplinary study (sedimentology: texture, carbonates, organic matter, elemental composition, mineralogy of sand and clay; micropaleontology: foraminifera, calcareous nannoplankton and pollen -and radiocarbon dating) of three cores recovered from the Douro estuary infill has allowed to reconstruct the paleoenvironmental guidelines of this...
RESUMO Palavras-chave: foraminíferos bênticos; Actual; salinidade; estuário Minho/Coura; Portugal. O estudo da evolução do estuário do rio Minho, desde o Último Máximo Glaciário, (projecto ENVICHANGES-FCT) iniciou-se pela análise das associações de Foraminíferos bênticos actuais, para apoiar a posterior interpretação de sondagens. A realização de p...
