Abstract:Resumolocação de limites edificados em praias é importante para projetos de intervenção urbana, por delimitar o domínio privado da vida pública. O muro de contenção tem papel fundamental como limite da área urbanizada, além da função de minimizar os efeitos da erosão e da inundação de áreas ocupadas. Neste artigo são analisados os casos dos projetos de intervenção para a orla da Praia do Amor, na Ilha de Outeiro, que é parte da Região Metropolitana de Belém, e da orla da praia de Marudá, cidade do nordeste do … Show more
“…The illegal and unplanned occupation of coastal areas, associated with the high local hydrodynamic energy has resulted in the destruction of natural environments, together with the infrastructure constructed in the foreshore zone. This problem is accentuated in semi-urban beaches, i.e., Marudá and Murubira (Nascimento and Lima, 2010). Similar problems have been found on other urban and semi-urban beaches on the Amazon coast (Pereira et al, 2014b;Silva et al, 2013).…”
Section: Environmental-social Interactions and Management Concernssupporting
The present study proposes a diagnosis of the conditions and impacts on estuarine beaches of the Amazonian coast based on the application of the DPSIR (Driving Forces, Pressures, State, Impact, Responses) model, which identifies the natural and anthropogenic drivers affecting the environment. Natural drivers are related primarily to the accentuated hydrodynamic processes, high rainfall and fluvial discharge. The anthropogenic driver is related to the lack of planning for beach development. These human pressures result in a reduction in the quality of the beaches through microbiological contamination, the accumulation of garbage on the sand and in the water, sewage outfalls, and overcrowding which, combined with the intense local hydrodynamics and the lack of planning of recreational activities (zoning, warning signs, lifeguard coverage) may increase the risk of accidents for beachgoers, such as drowning, and injuries caused by motorboats, jet skis and stingrays. Despite all the problems identified, no response whatsoever was observed from the local authorities. The results of the DPSIR analysis indicate an urgent need for the implementation of beach management plans to improve the conditions of the beaches and in particular their safety, as well as identifying the obligations of the local authorities responsible for the future development of the Amazon coast.Peer ReviewedPostprint (author's final draft
“…The illegal and unplanned occupation of coastal areas, associated with the high local hydrodynamic energy has resulted in the destruction of natural environments, together with the infrastructure constructed in the foreshore zone. This problem is accentuated in semi-urban beaches, i.e., Marudá and Murubira (Nascimento and Lima, 2010). Similar problems have been found on other urban and semi-urban beaches on the Amazon coast (Pereira et al, 2014b;Silva et al, 2013).…”
Section: Environmental-social Interactions and Management Concernssupporting
The present study proposes a diagnosis of the conditions and impacts on estuarine beaches of the Amazonian coast based on the application of the DPSIR (Driving Forces, Pressures, State, Impact, Responses) model, which identifies the natural and anthropogenic drivers affecting the environment. Natural drivers are related primarily to the accentuated hydrodynamic processes, high rainfall and fluvial discharge. The anthropogenic driver is related to the lack of planning for beach development. These human pressures result in a reduction in the quality of the beaches through microbiological contamination, the accumulation of garbage on the sand and in the water, sewage outfalls, and overcrowding which, combined with the intense local hydrodynamics and the lack of planning of recreational activities (zoning, warning signs, lifeguard coverage) may increase the risk of accidents for beachgoers, such as drowning, and injuries caused by motorboats, jet skis and stingrays. Despite all the problems identified, no response whatsoever was observed from the local authorities. The results of the DPSIR analysis indicate an urgent need for the implementation of beach management plans to improve the conditions of the beaches and in particular their safety, as well as identifying the obligations of the local authorities responsible for the future development of the Amazon coast.Peer ReviewedPostprint (author's final draft
“…Mesmo em regiões mais ocupadas e frequentadas pela população houve processo de acreção costeira a estabilidade. A presença de vegetação em Marudá no setor A favorece a retenção de sedimentos da praia, diminuindo a dinâmica hídrica e aumentando a linha de costa e estabilidade do local (Nascimento & Lima, 2010).…”
A análise de variações na linha de costa através de imagens multitemporais permite a identificação de processos erosivos e acrecionais em uma escala evolutiva. O objetivo desse trabalho foi avaliar as mudanças na linha de costa de praias estuarinas do litoral amazônico (município de Marapanim), entre os anos de 1988 a 2016, por meio de imagens do satélite Landsat. A partir da digitalização de linhas de costa das praias de Santa Maria, Marudá e Crispim, nos referentes anos e, utilizado a extensão Digital Shoreline Analysis (DSAS) no software ArcGis, foi possível realizar cálculos estatísticos de amplitude espacial (m) e taxa de variação anual (m/ano) do posicionamento da linha de costa. Os resultados indicaram que a praia de Santa Maria está em estado de equilíbrio sedimentar a acresção, apresentando variações de 3,89 a -1,23 m/ano ao longo da linha de costa. As praias de Marudá e Crispim estão em processo predominante de acreção costeira, apresentando linearmente variações de 8,87 a -1,61 m/ano, 40,91 a -9,82 m/ano; respectivamente. Contudo, fenômenos climáticos, físicos e impactos antrópicos podem ter sido responsáveis pela diminuição da taxa acrecional da linha de costa em determinados períodos (1994-2008), em setores distintos das praias.
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