Aplicação de sistema de análise de linha de costa (Digital Shoreline Analysis System) para avaliação de mudanças costeiras no delta do Parnaíba
The coastal zone are transitional environments, where continuous changes at different temporal and spatial scales occur, which are related to several processes such as oceanographic, fluvial, climatic and anthropogenic. Continuous monitoring of this environment provides essential information for...
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| Format: | Dissertação |
| Język: | pt_BR |
| Wydane: |
Brasil
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| Hasła przedmiotowe: | |
| Dostęp online: | https://repositorio.ufrn.br/jspui/handle/123456789/28519 |
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| Streszczenie: | The coastal zone are transitional environments, where continuous changes at different
temporal and spatial scales occur, which are related to several processes such as
oceanographic, fluvial, climatic and anthropogenic. Continuous monitoring of this
environment provides essential information for understand the spatial distribution of
erosive/depositional patterns, hence, its development. The main objective of this research
was to investigate the Parnaiba River Delta’s (PRD) shoreline behavior, at short and
intermediate time scale, between 1984 and 2017, through 12 Landsat satellite imagens
and statistical software (Digital Shoreline Analisys System). At intermediate scale, the
results showed that 52 % of PRD’s beaches are under shoreline retreat, while 48%
exhibited progradation. At short intervals, shoreline variations are directly related to the
climatic hydro influence in the drainage basin, specifically with the El Niño and La Niña
effects. On both time scales, major erosion trend occurred away from Parnaiba River
mouth and predominantly on the west side of the delta, while deposition, or stability,
prevailed on the east side. Due to lower anthropogenic impacts, both on coastal zone and
the drainage basin area, the natural factors, mainly river discharge and rainfall trends, are
likely to be main driving forces of shoreline changes between 1984 and 2017. |
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