1000 resultados para Praias - Contaminação


Relevância:

20.00% 20.00%

Publicador:

Resumo:

A qualidade ambiental das praias tem vindo a adquirir uma importância crescente entre os critérios de escolha de destino turístico. Apesar de, nos últimos anos, a legislação ter evoluído no sentido do ordenamento da zona costeira e do tratamento de águas residuais, a qualidade da água balnear é o único indicador da qualidade relacionado com a saúde pública que pode permitir aos utentes uma escolha orientada. Portugal apresenta-se na comunidade internacional como o primeiro país com um programa de monitorização de qualidade de areias, desenvolvendo ainda atividades de investigação a vários níveis que o permitam melhorar. Outros países avaliam técnicas de determinação de fontes de contaminação de águas de recreio, incluindo areias adjacentes e pesquisa de agentes etiológicos não monitorizados pelas legislações em vigor. Assim, há que concertar esforços no sentido de se encontrarem formas de monitorizar o risco para a saúde em tempo tão útil quanto possível, bem como reavaliar indicadores e seus limites de aceitação, mantendo a liderança desta atividade. Na sequência do Microareias 2012, em que foi feita uma reavaliação dos parâmetros interessantes para este tipo de análise, e numa fase em que internacionalmente se programam atividades técnico-científicas concertadas, foi montado um esquema de avaliação inter-laboratorial com laboratórios pioneiros nacionais. Em 2016, será apresentado o programa já implementado aos laboratórios atualmente participantes, aberto a laboratórios candidatos e profissionais interessados onde será feita uma atualização de conhecimentos e situação internacional.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The Cacimbinha and Madeiro beaches are located in the eastern coast of Rio Grande do Norte state, in the municipality of Tibau do Sul. Given the indicative of erosion in the coast of this district and the coastal processes acting on the beaches, the global aim of this project is comprehend the evolution of depositional environment on the Cacimbinha beach, moreover, the project seeks to characterize deposits from the Cacimbinha and Madeiro beaches, according to the geomorphologic compartments identified on these beaches; distinguish the coastal features which possibly interact with the Cacimbinha beach; identify the potential relationship between the sediments from the coastal features and the deposits from Cacimbinha beach; understand which depositional processes that prevail at each facies deposited on the beach; and identify the probable sedimentary environments and its energy of deposition through of the materials recorded on the Cacimbinha beach. This study was based on previous bibliographic and field research, both guided by academic works, laws, concepts and theories concerning the physical geography, geomorphology of the quaternary, sedimentary geology and stratigraphy. Thus, the methodology was divided in three steps: Prefield step: office work was performed; Field step: Sampling of facies of sedimentation; PosField step: analysis and integration of data obtained during the research period. Thus, the results showed deposicional facies with distinguished energy in the relief compartments, beach and terrace. After the sedimentary analysis and its interpretation linked to the architecture of the mounted sections based on drilling, it became possible to trace the evolutionary history of this stretch of beach. Therefore, it can be stated that studies performed on coastal areas are of great importance, as long as, around the world, the most part of urban zones are seated on deposits of quaternary age and, then this work improve the knowledge regarding the sedimentary dynamics of this beach, becoming scientific support for management and planning of this area which focus on, mainly, the foreign tourism

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The Área de Proteção Ambiental de Jenipabu was created by Decreto 12,620/95, covering the beaches of Redinha Nova, Santa Rita and Jenipabu and Campina communities in the municipality of Extremoz, and Africa community fragment, in Natal. This protected area was created in the context of expansion of tourism in Rio Grande do Norte, in the 1990s, in which PRODETUR investments made possible the installation of infrastructure equipment, mainly in the Via Costeira and Ponta Negra beach in Natal by inserting it in the sun and sea tourism route to Northeast Brazil. In this context the beach Jenipabu in Extremoz, became one of the main attractions for those visiting Natal, due to the natural elements of its landscape, its dune field, which is offered to tourists the buggy ride. In December 1994 the excess buggy rides held in these dunes led to IBAMA ban their access to buggy for carrying out environmental study. This measure resulted in the creation of APAJ in 1995 with the goal of ordering the use and occupation to protect its ecosystems, especially the dunes, the disordered tourism. Given this context, this work aims to analyze the process of creating the APAJ and changes in the geographic space of its beaches, Redinha Nova, Santa Rita and Jenipabu, from the materialization of tourism process, as well as their implications for its residents. To this end, this paper presents a discussion of environmental currents that developed in the western portion of the globe, focusing on the need to regulate small areas of the national territory in protected areas, and an analysis of public policies that enabled the implementation tourism in APAJ as well as the laws and decrees governing the process of creation and management. Using the theory of circuits of urban economy of the Santos (2008) to analyze the territory used by tourism on the beaches of Redinha Nova, Santa Rita and Jenipabu, showing their dependent relationship with the territory used by the upper circuit on the Via Costeira and in the Ponta Negra beach and its influence on the APAJ urbanization process. Ending with the analysis of the influence of the materialization of tourism in the transformation of stocks ways of being-in-space and space-be of the Santa Rita and Jenipabu beaches in each geographical situation of APAJ among the first decades of the twentieth century to the 2014. Fieldwork was conducted between 2012 and 2014, performing actions of qualitative interviews with older residents of Santa Rita and Jenipabu beaches, interviews with structured questionnaire with merchants of APAJ and collecting GPS points trades, identifying and mapping the territory used by the lower circuit in APAJ beaches.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Several studies have been developed regarding health risks associated with the recreational use of beaches contaminated with domestic sewage. These wastes contain various microorganisms, including Candida tropicalis, etiologic agent of both superficial infections such as systemic, as well as indicator of fecal contamination for the environment. In this context, the objective of this study was to characterize C. tropicalis isolates from the sandy beach of Ponta Negra, Natal, Rio Grande do Norte, Brazil, regarding the expression of in vitro virulence factors, adaptation to osmotic stress and susceptibility to antifungal drugs. We analyzed 62 environmental isolates of C. tropicalis and observed a great variation between them for the various virulence factors evaluated. In general, environmental isolates were more adherent to CEBH than C. tropicalis ATCC13803 reference strain, besides the fact they were also highly biofilm producers. In relation to morphogenesis, most isolates presented wrinkled phenotype in Spider medium (34 isolates, 54.8 %). When assessing enzyme activity, most isolates had higher proteinase production than C. tropicalis ATCC13803 reference strain. In addition, 35 isolates (56.4 %) had high hemolytic activity (hemolysis index > 55). With regard to C. tropicalis resistance to osmotic stress, 85.4% of the isolates were able to grow in a liquid medium containing 15% sodium chloride, corroborating to high survival capacity described for this yeast at marine environment. Finally, with regard to sensitivity to antifungal drugs, it was observed high resistance to the azoles tested, with the occurrence of the "Low-high" phenomenon and similar effect to the paradoxical growth which occurs to the echinocandins. For the three azoles tested we verified that 15 strains were resistant (24.2 %). Some strains were also resistant to amphotericin B (14 isolates, 22.6 %), while all of them were sensitive for the echinocandins tested. Therefore, our results demonstrate that C. tropicalis isolated from the sand of northeast of Brazil can fully express virulence attributes and showed a high persistence capacity on the coastal environment, in addition of being significantly resistant to most applied antifungals in current clinical practice. This constitutes a potential health risk to visitors of this environment, especially immunocompromised individuals and those with extreme age range.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This dissertation addresses issues considered essential for sustainable development of urban waterfronts and beaches. Many of these spaces, even though they are of public authorities, economic market and general population interests - due to its landscape, its importance for recreation purposes and as a basis of " Sun and beach Tourism " (Turismo de Sol e Praia), among other factors - have shown aesthetic, health and cultural degradation, entailing environmental, economic and social losses and conflicts. Based on this perception, the research aims to understand the main reasons for these negative results for beach spaces. To this end, it was chosen the case study of a typical urban beach, Ponta Negra Beach, located in Natal, RN. Ponta Negra is associated with the "postcard" of the city and it has been deserving of municipal urban planning legislation that legally recognizes the importance of its landscape. Also it has received constant investments by the Government through urban projects, arguing to leave the site attractive to its users. Nevertheless, in the last fifteen years, the beach has lived with the expansion of its problems, such as those related to bathing water, to coastal erosion, and to the mangling of its natural surroundings. Social conflicts have also been frequent in this time frame: conflicts between residents of the waterfront and traders who work on the beach, between the traders themselves, between the managers of space and fishermen, between managers and formal and informal traders. Many of these social and environmental conflicts have taken such grand proportions that became legal matters. Assuming that the problems identified are related to the issue of rationality - understood as a system of values, norms and actions that relate means and ends - and upholding the need for focused research on "environmental rationality" to understand and interpret the dynamics of social and environmental problems encountered on site, the research that guides the study relies on the Mexican economist Enrique Leff's theory on "environmental rationality" which, briefly, can be defined as a system of values, norms, actions and means and ends relations based on the principles of environmental management and sustainable development. Among other aspects, rationality encompasses cross-sectional planning of public administration, the participation of society in the management of environmental resources, interdisciplinary reorganization of knowledge, the clash of opposing interests and the conciliation of common goals of different social actors. The study evaluates the relationship between "environmental rationality", as proposed by Enrique Leff, with the management, urban interventions and uses observed in Ponta Negra Beach. For that, some benchmarks were established and considered in the research as related to sustainable development of the "beachy" atmosphere. Analytical instruments chosen were the urban transformations and the environmental and social problems that have been the target of lawsuits. Also part of the study, the problems that were the subject of civil investigations, which are investigation procedures carried out by the Prosecutor's Office.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This dissertation addresses issues considered essential for sustainable development of urban waterfronts and beaches. Many of these spaces, even though they are of public authorities, economic market and general population interests - due to its landscape, its importance for recreation purposes and as a basis of " Sun and beach Tourism " (Turismo de Sol e Praia), among other factors - have shown aesthetic, health and cultural degradation, entailing environmental, economic and social losses and conflicts. Based on this perception, the research aims to understand the main reasons for these negative results for beach spaces. To this end, it was chosen the case study of a typical urban beach, Ponta Negra Beach, located in Natal, RN. Ponta Negra is associated with the "postcard" of the city and it has been deserving of municipal urban planning legislation that legally recognizes the importance of its landscape. Also it has received constant investments by the Government through urban projects, arguing to leave the site attractive to its users. Nevertheless, in the last fifteen years, the beach has lived with the expansion of its problems, such as those related to bathing water, to coastal erosion, and to the mangling of its natural surroundings. Social conflicts have also been frequent in this time frame: conflicts between residents of the waterfront and traders who work on the beach, between the traders themselves, between the managers of space and fishermen, between managers and formal and informal traders. Many of these social and environmental conflicts have taken such grand proportions that became legal matters. Assuming that the problems identified are related to the issue of rationality - understood as a system of values, norms and actions that relate means and ends - and upholding the need for focused research on "environmental rationality" to understand and interpret the dynamics of social and environmental problems encountered on site, the research that guides the study relies on the Mexican economist Enrique Leff's theory on "environmental rationality" which, briefly, can be defined as a system of values, norms, actions and means and ends relations based on the principles of environmental management and sustainable development. Among other aspects, rationality encompasses cross-sectional planning of public administration, the participation of society in the management of environmental resources, interdisciplinary reorganization of knowledge, the clash of opposing interests and the conciliation of common goals of different social actors. The study evaluates the relationship between "environmental rationality", as proposed by Enrique Leff, with the management, urban interventions and uses observed in Ponta Negra Beach. For that, some benchmarks were established and considered in the research as related to sustainable development of the "beachy" atmosphere. Analytical instruments chosen were the urban transformations and the environmental and social problems that have been the target of lawsuits. Also part of the study, the problems that were the subject of civil investigations, which are investigation procedures carried out by the Prosecutor's Office.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

A literatura para a infância tem oscilado entre o tradicional da fantasia e a contaminação de tipos que a pós-modernidade quase impõe. Importa saber se esta contaminação de fronteiras atinge o público leitor, motivando-o a tornar-se leitor, como sempre o fez.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

O mundo atual passa por uma crise ambiental sem precedentes na história, o que resulta em conseqüências ambientais perceptíveis e preocupantes. Governos e organizações internacionais têm dado maior relevância à variável ambiental como um dos principais eixos de definição das políticas de crescimento/desenvolvimento econômico, como o intuito de adequar as demandas sociais aos limites naturais. Como consequências dessa forma perdulária de produção e consumo da sociedade global temos a contaminação ambiental ampliada e diversificada. O presente artigo discute a acumulação capitalista no setor dos resíduos sólidos, partindo da hipótese da impossibilidade de se diminuir a geração ampliada dos resíduos, sendo necessário que se crie estratégias de gestão e tratamento para os resíduos baseados na atividade da reciclagem dos materiais. A parte final expõe os paradigmas da questão dos resíduos sólidos na sociedade global.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

As areias das praias contêm por vezes microrganismos nocivos para a saúde humana, frequentemente em superiores às que existem na água. Atualmente (Brandão et al. 2002; Sabino et al. 2012; Solo-Gabriele et al. 2015) não existe regulamentação para a amostragem, análise e apreciação da qualidade microbiológica de areias. O Programa Nacional de Avaliação Externa da Qualidade (PNAEQ), inserido no Departamento de Epidemiologia do Instituto Nacional de Saúde Dr. Ricardo Jorge, Portugal, implementou em 2015 um ensaio piloto no âmbito da avaliação externa da qualidade microbiológica de areias. Um dos principais objetivos é a harmonização da metodologia utilizada nos laboratórios, para avaliar a quantificação e identificação de microrganismos indicadores, quer bacterianos quer fúngicos, nas areias de praias, através da avaliação do desempenho dos resultados interlaboratoriais.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

O mundo atual passa por uma crise ambiental sem precedentes na história, o que resulta em conseqüências ambientais perceptíveis e preocupantes. Governos e organizações internacionais têm dado maior relevância à variável ambiental como um dos principais eixos de definição das políticas de crescimento/desenvolvimento econômico, como o intuito de adequar as demandas sociais aos limites naturais. Como consequências dessa forma perdulária de produção e consumo da sociedade global temos a contaminação ambiental ampliada e diversificada. O presente artigo discute a acumulação capitalista no setor dos resíduos sólidos, partindo da hipótese da impossibilidade de se diminuir a geração ampliada dos resíduos, sendo necessário que se crie estratégias de gestão e tratamento para os resíduos baseados na atividade da reciclagem dos materiais. A parte final expõe os paradigmas da questão dos resíduos sólidos na sociedade global.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

O imposex em gastrópodes (Acanthina monodon, Oliva peruviana e Xanthochroid Cassidyformis) e os níveis de butilestânicos (BTs) em sedimentos superficiais e tecidos foram avaliados em três áreas sob a influência das atividades marítimas ao longo da costa central do Chile. As concentrações mais elevadas de TBT foram observadas na baia de São Vicente (Concepción), atingindo 122,3 ng Sn g-1 em sedimentos superficiais e 59,7 ng Sn g-1 em tecidos de gastrópodes, enquanto em Valparaiso variou de 7,4 a 15,8 ng Sn g-1 em biota. As menores concentrações de TBT em sedimentos foram detectadas em Coquimbo (<2 ng Sn g- 1 ), que pode ser atribuída a um menor tráfego de embarcações (provavelmente usando produtos livres de TBT) associado à dinâmica local. Apesar de DBT e MBT serem os analitos predominantes, aportes recentes de TBT foram evidentes em algumas áreas. Na verdade, os barcos de pesca pode ser uma fonte relevante, uma vez que estes predominaram nos locais mais contaminados. Além disso, a ausência de diferenças significativas entre os níveis BTs de ambos os sexos de A. monodon sugere que os tecidos de sexos distintos podem ser indistintamente utilizados para estudos futuros de contaminação. A incidência de Imposex foi detectada em 11 dos 15 locais amostrados, indicando que os níveis ambientais de TBT tem sido suficiente para induzir efeitos deletérios sobre os organismos expostos. Assim, os impactos causados pelo TBT nas zonas costeiras do Chile foram detectáveis e consistentes com outros estudos realizados na América do Sul. Este problema ambiental pode ser, provavelmente, devido a falta de regulamentação proibindo o uso de tintas antiincrustantes a base de TBT, indicando que esta pode ser a realidade das demais áreas do Chile sob influência de atividades marítimas.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Dissertação (mestrado)—Universidade de Brasília, Faculdade de Ciências da Saúde, Programa de Pós-Graduação em Ciências da Saúde, 2015.