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- Improving the response to operational pollution in the South Iberian coast A Super-Ensemble backtracking approachPublication . Janeiro, João; Sepp Neves, Antonio Augusto; Martins, Flávio; Campuzano, FranciscoAlthough for the general public marine oil pollution happens when an oil tanker sinks in the ocean or an accident occurs in an oil platform, most of the oil entering the world ocean does it along less obvious paths. This research work focus on operational spills. It provides a first indication of the uncertainty associated to backtracking simulations using solutions from several operational models available on the internet for the South Iberia region. The suitability of using a Super-Ensemble approach as a way of minimizing the uncertainty was also investigated. The methodology was validated using drifting buoys available for the region. Results show the advantages of using the Super-Ensemble while pointing out for the importance of the atmospheric forcing in this region due to its characteristic mesoscale activity. The absence of more trajectories sparse in time and geographic coverage was a limitation found.
- Development of an operational tool for oil spill forecast: application to oil exposed regionsPublication . Janeiro, João Miguel Leitão; Martins, Flávio; Relvas, PauloThe objective of the following thesis is to present a modelling methodology, based on the MOHID system, which allows the development of coastal operational models by taking advantage of already implemented regional operational models using a downscaling approach. This increase in resolution allows studying the influence of coastal scale processes in the dynamics of oil spills, while contributing to more accurate forecasts. The methodology was used to forecast the evolution of oil spills in two distinct areas both prone to oil pollution events: Southwest Portuguese Coast and the Tuscany Archipelago (Italy). In both regions an operational model was developed and validated to a good level, using several types of oceanographic data available in European and global databases. The method was tested during the Costa Concordia accident, where operational forecasts aided the Italian authorities during the fuel removal operations. Also considered in this work are the interaction between waves/currents/wind in the dynamics of oil spills at sea, the identification of mesoscale circulation patterns and their influence on the risk to accidents as well as the integration of these numeric methods with early detection and monitoring systems.
- Integrating technologies for oil spill response in the SW Iberian coastPublication . Janeiro, João; Sepp Neves, Antonio Augusto; Martins, Flávio; Relvas, PauloAn operational oil spill modelling system developed for the SW Iberia Coast is used to investigate the relative importance of the different components and technologies integrating an oil spill monitoring and response structure. A backtrack of a CleanSeaNet oil detection in the region is used to demonstrate the concept. Taking advantage of regional operational products available, the system provides the necessary resolution to go from regional to coastal scales using a downscalling approach, while a multi-grid methodology allows the based oil spill model to span across model domains taking full advantage of the increasing resolution between the model grids. An extensive validation procedure using a multiplicity of sensors, with good spatial and temporal coverage, strengthens the operational system ability to accurately solve coastal scale processes. The model is validated using available trajectories from satellite-tracked drifters. Finally, a methodology is proposed to identifying potential origins for the CleanSeaNet oil detection, by combining model backtrack results with ship trajectories supplied by AIS was developed, including the error estimations found in the backtrack validation. (C) 2017 Elsevier B.V. All rights reserved.
- Relatório setor zonas costeiras e mar: vulnerabilidades atuais e futurasPublication . Moura, Delminda; Garel, Erwan; Martins, Flávio; Mendes, Isabel; Janeiro, João; de Oliveira Júnior, Luciano; Carrasco, A. Rita; Sampath, Ruwan; Costas, Susana; C. Veiga-Pires, C.O litoral algarvio estende-se desde a foz da Ribeira de Odeceixe na Costa Oeste (37° 26’ 38,35’’ N; 008° 48’ 50,00’’ O) à foz do Rio Guadiana na costa Sul (37° 10’ 02,10’’ N; 007° 24’ 07’’ O) num total de cerca de 210 km. Este extenso litoral é constituído por morfologias costeiras muito diversas e talhado em formações com idades e litologias muito variadas. De um modo geral, a costa do Algarve pode ser dividida em i) litoral de arribas rochosas, ii) litoral de arribas arenosas e iii) litoral baixo, que se diferenciam entre si pelo substrato físico que os suporta e pelos processos dinâmicos responsáveis pela sua evolução.
- The role of Ria Formosa as a waste water receiverPublication . Veríssimo, Filipe; Martins, Flávio; Janeiro, JoãoRia Formosa is a system of barrier islands that communicates with the sea through six inlets, situated in the Algarve, the most southern region of Portugal which encompasses the municipalities of Loulé, Faro, Olhão, Tavira and Vila Real de Santo António, covering an area of about 18,400 hectares along a 60 km stretch from the Ancão beach to Manta Rota beach (Figure 4.1). It is an area protected by the status of Natural Park, granted by Law n. º 373/87 of December 9th and its classified as a sensible area according to the law n.º 152/97 of June 19th concerning urban waste water discharges, in order to assure water quality standards for shellfish aquaculture. This ecosystem is very important from the socio-economic point of view, being responsible for 41% of the Portuguese national production of bivalve shellfish, with a small finfish production (IMAR, 2012).