IMPACTOS AMBIENTAIS DECORRENTES DE VAZAMENTO DE GÁS NATURAL DE BAIXA E MÉDIA PRESSÕES, NA ÁREA URBANA CENTRAL DO MUNICÍPIO DE SÃO PAULO
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Data
2006
Autores
Moscardi, Jean Prost [UNESP]
Araujo, Neide
Saad, Antônio Roberto
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Resumo
Com a busca por fontes de energia alternativas, o gás natural vem adquirindo posicionamento de destaque por seu relativo baixo custo de aquisição ao consumidor final e por apresentar reduzidos impactos na implantação de dutovias, comparados com outras fontes de energia (hidroelétrica e fissão). O presente trabalho foi direcionado para a verificação de possíveis impactos oriundos de vazamentos em tubulações de gás em sua fase operacional. A área de estudo localiza-se no Município de São Paulo; sua escolha deve-se por apresentar tubulações centenárias que demandam constantes intervenções ou manutenções e pela fácil captação de amostras para análise. Foram amostrados 40 pontos e nestes analisados aspectos dos meios antrópico, biótico e físico-químico. O método adotado fundamentou-se na caracterização dos dutos de gás e sua manutenção, no diagnóstico ambiental, considerados os fatores ambientais solo, ar, flora, fauna, condições de vida da população e paisagem urbana, e posterior identificação de impactos, nas situações de alteração dos impactos ambientais. Os resultados demonstraram que qualquer vazamento de gás gera uma alteração em pelo menos um fator ambiental, denotando um impacto. Novas linhas de estudo são propostas como melhor análise químico-física do material exposto ao contaminante e reações químicas do odorante com o solo que teve contato.
With the search for alternative power plants, the natural gas is acquiring prominence due to its relative low cost of acquisition for the final consumer, and to present reduced impacts in the implantation of pipelines compared with other sources of energy (hydroelectric and fission). The present work was directed to the verification of possible impacts originated from leaks in operational phase of gas piping. The study area is situated in the city of São Paulo, Brazil. It presents centennial gas pipelines, which demand constant interventions or maintenance, and easiness to collect samples for analysis. 40 points were sampled and analyzed in their anthropic, biotic and physical-chemical aspects. The adopted method was based in the characterization of the gas ducts and their maintenance, followed by the environment diagnosis, taking into account the soil, air, flora and fauna, conditions of the population life and urban landscape, with subsequent identification of impacts, in the situations of alteration of the environment impacts. The results had demonstrated that any gas leak generates an alteration in at least one environmental factor, denoting an impact. New study lines are proposed as better chemical-physical analysis of the material exposed to the pollutant and chemical reactions of the odorants with which the soil is in contact.
With the search for alternative power plants, the natural gas is acquiring prominence due to its relative low cost of acquisition for the final consumer, and to present reduced impacts in the implantation of pipelines compared with other sources of energy (hydroelectric and fission). The present work was directed to the verification of possible impacts originated from leaks in operational phase of gas piping. The study area is situated in the city of São Paulo, Brazil. It presents centennial gas pipelines, which demand constant interventions or maintenance, and easiness to collect samples for analysis. 40 points were sampled and analyzed in their anthropic, biotic and physical-chemical aspects. The adopted method was based in the characterization of the gas ducts and their maintenance, followed by the environment diagnosis, taking into account the soil, air, flora and fauna, conditions of the population life and urban landscape, with subsequent identification of impacts, in the situations of alteration of the environment impacts. The results had demonstrated that any gas leak generates an alteration in at least one environmental factor, denoting an impact. New study lines are proposed as better chemical-physical analysis of the material exposed to the pollutant and chemical reactions of the odorants with which the soil is in contact.
Descrição
Palavras-chave
Impactos ambientais, vazamentos de gás natural de baixa e média pressões em áreas urbanas, manutenção em dutovias
Como citar
Geociências, v. 25, n. 4, 2006, p. 417-428.