22 documents found, page 1 of 3
Influence of sulphide mine tailings on drainage water quality, 60 years after i...
Fonseca Araújo, Joana; Fonseca, Rita; Albuquerque, Maria Teresa; Silva, Natália; da Silva, RobertoABSTRACT: The GeoMatRe project aims to find low-cost solutions for water and sediment rehabilitation using raw geomaterials, in abandoned mines of the Iberian Pyritic Belt. One of our case studies is the Caveira mine in southwestern Portugal, where large piles of mining waste, containing significant amounts of metals, record the long history of its exploitation for gold (Au) and silver (Ag). After the exhaustio...
Avaliação do nível de contaminação nos sedimentos de cursos de água do Sistema ...
da Silva, Roberto; Fonseca, Rita; Fonseca Araújo, Joana; Silva, Natália; Albuquerque, Maria TeresaRESUMO: O presente trabalho, inserido no Projeto GeoMatRe, visa o levantamento das condições mais atualizadas no que toca aos parâmetros físico-químicos numa mina de drenagem ácida. Uma situação crítica que ocorre na área mineira de Caveira, em Grândola, Portugal, abandonada desde a década de 60 do século passado. O objetivo passa por analisar as condições de contaminação de Elementos Potencialmente Tóxicos (EP...
Relations between river sediments and dissolved matter
Egozcue, Juan José; Pawlowsky-Glahn, Vera; Fonseca, Rita; Albuquerque, Maria TeresaA typical but actually unsolved problem is relating dissolved ions in water and the chemical composition of the corresponding sediments. Our first assumption is that botH ion concentrations and the sediments are compositional in nature. Data from the 2022 and 2023 campaigns in the Trimpancho river (Mining System) (Huelva, Spain) are used to illustrate the possibilities and the challenges of such an analysis. Th...
Remote sensing for water quality monitoring: a reservoir case study
Albuquerque, Maria Teresa; Alegria, Cristina MariaContinuous monitoring of water resources is crucial for ensuring sustainable urban water supply. Remote sensing techniques have proven to be valuable in monitoring various water quality parameters with optical characteristics. The study focused on the Marateca reservoir located in central inland Portugal. The objectives were as follows: (1) to investigate the water quality parameters at different monitoring poi...
The Portuguese musical heritage: A methodology for enhanced knowledge, preserva...
Albuquerque, Maria João; Albuquerque, Maria Teresa; Teixeira da Costa, Mónica Isabel; Gonçalves, JoanaThe musical heritage preserved by Portuguese Memory Institutions stands as a tangible testimony to the rich landscape of musical creation and practices in our cultural history. Preserving and scholarly examining this legacy are imperative for building a robust cultural identity. Regrettably, in Portugal, a substantial portion of this heritage remains undiscovered or overlooked by the institutions responsible. I...
Investigating contamination indexes and mobility processes in mine-stream sedim...
antunes, Isabel Margarida; Carvalho, Paula; Albuquerque, Maria Teresa; Santos, AntónioThe mining industry plays a crucial role in today’s society due to the growing demand for strategic materials. Nevertheless, it is essential to acknowledge the signi cant threats posed to the environment by mining operations. Striking a delicate balance between resource needs and environmental protection is imperative.
Compositional signature of trace elements in stream sediments along the Babahoy...
Cabrera, Marlon; Pazo, Maria; Gerassis Davite, Saki; Albuquerque, Maria Teresa; Sierra, C.; Boente, CarlosThe high concentration of potencially toxic elements (PTEs) in stream sediments may pose a significant threat since the pollutants may travel long distances to the sea, affecting aquatic environments and public health. When rivers cross large cities, minning, or cultivated areas, it is usually observing an increasing concentration of PTEs downstream, reachiong hazardeous levels due to the ability and persistenc...
A global dataset of near-natural basins for climate change detection
Turner, Steve; Hannaford; Berker, Lucy; Dixon, Harry; Griffin, Adam; Kumar, Amit; Suman, Gayatri; Goula, Albert Bi Tié; Watson, AndrewAs hydrological extremes become more severe in the warming world, impacts to livelihoods, infrastructure, and economies worsen. To attribute emerging trends to climate change, we need to remove the signal of anthropogenic activities, such as, the presence of dams, land-cover change, channelisation and the abstraction of water for public water supplies, industry and agriculture. These human disturbances can obsc...
Global hydrological dataset of daily streamflow data from the Reference Observa...
Turner, S.; Hannaford, J.; Barker, L.J.; Suman, G.; Armitage, R.; Killeen, A.; Griffin, A.; Davies, H.; Kumar, A.; Dixon, H.; Albuquerque, Maria TeresaData were provided by national measuring agencies following a selection process from their wider networks. Following submission of data and metadata to the ROBIN Network, a quality control process was conducted centrally to assess the quality and suitability of the station's inclusion in the dataset. Daily streamflow records were visually screened for change points, visually anomalous conditions indicating meth...
How will climate change impact maritime pine forest distribution and productivi...
Alegria, Cristina Maria; Almeida, Alice M.; Ribeiro, Maria Margarida; Martins Roque, Natália; Fernandez, Paulo; Gerassis, SakiPortuguese maritime pine forests are severely affected by forest fires. The study aimed at modelling: (1) species’ current distribution and productivity; and (2) species’ distribution for projected future climate change scenarios. The land cover, national forest inventory, and environmental data were used. A Bayesian Machine Learning (ML) analysis allowed exploring the most influential environmental variables. ...