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Erosão e Galgamentos na Costa Portuguesa
| Summary: | This work evaluated the results on the implementation of territorial management instruments in the occupation of coastal space in Portugal, as well as the effectiveness of the proposed measures and their implementations over the past few years, on changes in exposure to erosion risk and coastal gaps. The choice of this study was fundamentally due to the importance on identifying, solving and mitigating the problems of the Portuguese coastal zone, in particular the fact that it assumed an important strategy regarding our country's sustainable development policy, and its integrated and coordinated management of these areas. The work consisted mainly on evaluating the current state of the art on what has been already done, analysing the added value of investments in the measures implemented during the last decades, with a special focus on two case studies considered to be the most representative of the current reality of our coast. The focused studies highlighted these weaknesses, associated with overconfidence in the coastal defences adopted, as well as the vulnerability to which communities are subject. Therefore, it is urgent to ensure the safety of the whole coast in order to mitigate the sea progress towards the land and, for this reason, it is important to analyse and find solutions that allow a balance in the sedimentary dynamics. Thus, it is understood as a priority to create a larger deposit of aggregates in the areas near the coast, allowing the effect of energy loss of the waves in their surfacing, resulting in the reduction of their spreading by the coast. Through the use of new techniques recently developed, instead of those classical ripping techniques from the past, which consist of the use of a mechanical Bypass – a solution not yet tested in Portugal – using permanent pumping systems, it would be possible to transport submerged sands from greater accumulation, to the most deprived areas, thus allowing them to be replenished on the coastal zones that have a strong sedimentary deficit. |
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| Authors: | Oliveira, Ana Paula |
| Subject: | Coastal Erosion, Gouges, Impacts, Mitigation. Erosão Costeira, Galgamentos, Impactes, Mitigação |
| Year: | 2020 |
| Country: | Portugal |
| Document type: | master thesis |
| Identifiers: | ID: 202437787 |
| Access type: | Open |
| Associated institution: | Repositório Comum, Instituto Superior de Ciências Educativas, Repositório Comum, Instituto Superior de Educação e Ciências, Repositório Comum |
| Funded project code: | 202437787 |
| Language: | Portuguese |
| Origin: | Repositório Comum |
| Summary: | This work evaluated the results on the implementation of territorial management instruments in the occupation of coastal space in Portugal, as well as the effectiveness of the proposed measures and their implementations over the past few years, on changes in exposure to erosion risk and coastal gaps. The choice of this study was fundamentally due to the importance on identifying, solving and mitigating the problems of the Portuguese coastal zone, in particular the fact that it assumed an important strategy regarding our country's sustainable development policy, and its integrated and coordinated management of these areas. The work consisted mainly on evaluating the current state of the art on what has been already done, analysing the added value of investments in the measures implemented during the last decades, with a special focus on two case studies considered to be the most representative of the current reality of our coast. The focused studies highlighted these weaknesses, associated with overconfidence in the coastal defences adopted, as well as the vulnerability to which communities are subject. Therefore, it is urgent to ensure the safety of the whole coast in order to mitigate the sea progress towards the land and, for this reason, it is important to analyse and find solutions that allow a balance in the sedimentary dynamics. Thus, it is understood as a priority to create a larger deposit of aggregates in the areas near the coast, allowing the effect of energy loss of the waves in their surfacing, resulting in the reduction of their spreading by the coast. Through the use of new techniques recently developed, instead of those classical ripping techniques from the past, which consist of the use of a mechanical Bypass – a solution not yet tested in Portugal – using permanent pumping systems, it would be possible to transport submerged sands from greater accumulation, to the most deprived areas, thus allowing them to be replenished on the coastal zones that have a strong sedimentary deficit. |
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