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CO2 emissions from a tropical hydroelectric reservoir (Balbina, Brazil). Repositório Alice
KEMENES, A.; FORSBERG, B. R.; MELACK, J. M..
Hydroelectric reservoirs can release significant quantities of CO2, but very few results are available from the tropics. The objective of the present study was to estimate the emission of CO2 from the Balbina hydroelectric reservoir in the central Brazilian Amazon. Diffusive and ebullitive emissions were estimated at regular intervals, both above and below the dam, using a combination of static chambers and submerged funnels. Gas releases immediately below the dam were calculated as the difference between gas flux at the entrance and the outflow of the hydroelectric turbines. An inundation model derived from a bathymetric map and daily stage readings was used for spatial and temporal interpolation of reservoir emissions. Annual emissions of CO2, upstream...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Emissão de gás carbônico; CO2.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/handle/doc/896953
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Downstream emissions of CH4 and CO2 from hydroelectric reservoirs (Tucuruí, Samuel, and Curuá-Una) in the Amazon basin. Repositório Alice
KEMENES, A.; FORSBERG, B. R.; MELACK, J. M..
Carbon dioxide (CO2) and methane (CH4) generated in reservoirs are released downstream of dams, and few studies have considered these downstream emissions. Fluxes downstream of 3 Amazon hydroelectric reservoirs (Tucuruí, Samuel, and Curuá-Una) are reported here. Degassing through turbines was calculated as the difference between intake and outflow concentrations. Additional releases along the Tocantins, Jamari, and Curuá rivers were measured at were liberated at the turbine outflow. The total downstream emissions are sufficiently large to require consideration in assessments of greenhouse gas emissions from hydroelectric reservoirs.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Reservatórios Amazônicos; Dióxido de carbono; Hidrelétricas; Metano.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1045950
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