Abstract
This paper presents the results of gross carbon dioxide and methane emission measurements in several Brazilian hydro reservoirs. The term ‘gross emissions’ means gas flux measurements from the reservoir surface without correcting for natural pre-impoundment emissions by natural bodies such as the river channel, seasonal flooding and terrestrial ecosystems. The net emissions result from estimating pre-existing emissions by the reservoir. Measurements were carried in the Miranda, Barra Bonita, Segredo, Três Marias, Xingó, Samuel and Tucuruí reservoirs, located in two different climatological regimes. Additional data were used here from measurements taken at the Itaipu and Serra da Mesa reservoirs. Emissions of carbon dioxide and methane in each of the reservoirs selected, whether through bubbles or diffusive exchange between water and atmosphere, were assessed by sampling, with subsequent extrapolation of results to obtain a value for the reservoir. A great variability was found in the emissions, linked to the influence of various factors, including temperature, depth at the point of measurement, wind regime, sunlight, physical and chemical parameters of water, the composition of the local vegetation and the operational regime of the reservoir.
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© 2005 Springer-Verlag Berlin Heidelberg
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dos Santos, M.A., Matvienko, B., Rosa, L.P., Sikar, E., dos Santos, E.O. (2005). Gross Greenhouse Gas Emissions from Brazilian Hydro Reservoirs. In: Tremblay, A., Varfalvy, L., Roehm, C., Garneau, M. (eds) Greenhouse Gas Emissions — Fluxes and Processes. Environmental Science. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-26643-3_12
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DOI: https://doi.org/10.1007/978-3-540-26643-3_12
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-23455-5
Online ISBN: 978-3-540-26643-3
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