Use este identificador para citar ou linkar para este item: http://repositorio.inpa.gov.br/handle/123/1962
Título: Do hydroelectric dams mitigate global warming? The case of Brazil's Curuá-Una Dam
Autor(es): Philip Martin Fearnside
Assunto: Carbono
Barragens
Efeito Estufa
ISSN: 1381-2386
Revista: Mitigation and Adaptation Strategies for Global Change
Volume: 10
Resumo: Hydroelectric dams in tropical forest areas emit greenhouse gases, as illustrated by the Curuá-Una Dam in the Amazonian portion of Brazil. Emissions include carbon dioxide from decay of the above-water portions of trees that are left standing in the reservoir and methane from soft vegetation that decays under anaerobic conditions on the bottom of the reservoir, especially macrophytes (water weeds) and vegetation that grows in the drawdown zone and is flooded when the reservoir water level rises. Some methane is released from the reservoir surface through bubbling and diffusion, but larger amounts are released from water passing through the turbines and spillway. Methane concentration in the water increases with depth, and the turbines and spillway draw water from sufficient depth to have substantial methane content. In 1990 (13 years after filling), the Curuá-Una Dam emitted 3.6 times more greenhouse gases than would have been emitted by generating the same amount of electricity from oil.
URI: http://repositorio.inpa.gov.br/handle/123/1962
ISSN: 1381-2386
DOI: https://dx.doi.org/10.1007/s11027-005-7303-7
Aparece nas coleções:Coordenação de Dinâmica Ambiental (CDAM)

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