76 documents found, page 1 of 8
Spectral Unmixing of Coastal Dune Plant Species from Very High Resolution Satel...
Kombiadou, Katerina; Costas, Susana; Gallego-Fernández, Juan Bautista; Yang, Zhicheng; Bon de Sousa, Luísa; Silvestri, SoniaWhile improvements in the spectral and spatial resolution of satellite imagery have opened up new prospects for large-scale environmental monitoring, this potential has remained largely unrealised in dune ecogeomorphology. This is especially true for Mediterranean coastal dunes, where the highly mixed and sparse vegetation requires high resolution satellites and spectral unmixing techniques. To achieve this aim...
Spectral unmixing of coastal dune plant species from very high resolution satel...
Kombiadou, Katerina; Costas, Susana; Gallego-Fernández, Juan Bautista; Yang, Zhicheng; Serrão Bon de Sousa, Maria Luísa; Silvestri, SoniaWhile improvements in the spectral and spatial resolution of satellite imagery have opened up new prospects for large-scale environmental monitoring, this potential has remained largely unrealised in dune ecogeomorphology. This is especially true for Mediterranean coastal dunes, where the highly mixed and sparse vegetation requires high resolution satellites and spectral unmixing techniques. To achieve this aim...
Scanning the horizon: anticipating future changes in Portuguese aquatic ecosystems
Sousa, Ronaldo; Ferreira, Verónica; Costas, Susana; Alves, Celso; Anastácio, Pedro; Chaínho, Paula; Costa, Pedro A.; Duarte, Sofia; Feio, Maria JoãoWe identified 15 emerging and poorly understood topics related to aquatic ecosystems in Portugal (from an initial pool of 43), which were scored and prioritized using a consensus-based Delphi technique. For marine ecosystems, the topics included current and future threats to low-lying sandy coasts, the impacts of the green energy transition, the risks posed by pathogens on floating ocean debris, the strategic i...
The birth of backbarrier marshes in Culatra Island (Ria Formosa, South Portugal)
Kompiadou, Aikaterini; Carrasco, Rita; Costas, Susana; Ramires, Margarida; Matias, AnaThe rapid elongation of Culatra Island, a sandy barrier in the Ria Formosa chain (S. Portugal), since the mid1940s led to the formation of three new embayments in its backbarrier that were gradually colonised by halophytic vegetation. This provided a rare opportunity to collect information and data on the very early stages of backbarrier marsh plant establishment and evolution. Sediment (surface and subsurface)...
Foredune initiation and early development through biophysical interactions
Costas, Susana; Serrão Bon de Sousa, Maria Luísa; Gallego-Fernández, Juan B.; Hesp, Patrick; Kombiadou, KaterinaCoastal dunes result from complex interactions between sand transport, topography and vegetation. However, uncertainty still persists due to limited quantitative analyses, integrating plant distribution and morphologic changes. This study aims to assess the initiation and maintenance of feedback processes by analysing the early development stages of incipient foredunes, combining data on the evolution of the pl...
Review of the quantification of aeolian sediment transport in coastal areas
Husemann, Paul; Romão, Frederico; Lima, Márcia; Costas, Susana; Coelho, CarlosCoastal dunes, formed and shaped by aeolian sediment transport, play a crucial role in ecosystem services and act as natural flood and coastal erosion defenses. This paper delves into theoretical equations and numerical models predicting sediment transport. Numerical models like cellular automata, XBeach-DUNA, the coastal dune model, and others are analyzed for their ability to simulate dune morphology, erosion...
Âmago II: the creative process of an underwater vietnamese self-portrait
Costas, Susana; Mendes da Silva, BrunoThis short paper explores the legacy of video art, challenging conventions of representation and perception while blurring boundaries between physical and virtual realities. It focuses on the digital creation process of the video artwork Amago II, which delves into themes of self-representation, self-narratives, and cultural symbolism of spaces and objects. The video art employs visual metaphors to guide the vi...
Ecogeomorphic response of a coastal dune in southern Portugal regulated by extr...
Costas, Susana; Gallego-Fernández, Juan B.; Bon de Sousa, Luísa; Kombiadou, KaterinaCoastal dunes are complex landforms whose morphology results from various interactions between biotic and abiotic factors. Here, we explore the longshore variability of the morphological features, plant community dis-tribution and accumulation patterns of a dune segment (1.4 km-long) located at the downdrift end of a sandy peninsula in the Ria Formosa, Portugal. To understand the main drivers of the observed va...
Insights from a digital diary: exploring the creative process of the game-insta...
Tavares, Mirian; Mendes da Silva, Bruno; Costas, Susana; Bidarra, JoséThis article proposes an approach to the creative gesture, particularly in digital art, and the methodologies that provide access to the process of creation. It suggests a study on the development of a digital journal to document and reflect on the creative process, with a specific focus on the In[The Hate Booth] project. Through analysing entries in the project's digital journal, the research explores the arti...
Exploring controls on coastal dune growth through a simplified model
Kombiadou, Katerina; Costas, Susana; Roelvink, DanoProcess-based morphodynamic models can be useful in understanding coastal dune responses to disturbances, as well as possible evolutionary patterns. To this aim, we employ Duna, a simplified 1D morphodynamic model, to assess the influence of dune morphology (height and slope) on sand transfer and deposition across the dune profile for different beach widths and wind incidence angles through idealized experiment...