Gross greenhouse gas fluxes from hydro-power reservoir compared to thermo-power plants

Santos, Marco Aurélio dos; Rosa, Luiz Pinguelli; Sikar, Bohdan; Sikar, Elizabeth; Santos, Ednaldo Oliveira dos

doi:10.1016/j.enpol.2004.06.015

Cited by 172 publications

(118 citation statements)

References 9 publications

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“…Thus, the highest emissions that we found in the present study were higher than those found by Santos et al (2006) in the previous study, with the exception of CH 4 emissions in Serra da Mesa, which in this study had lower values.…”

Section: Discussioncontrasting

confidence: 56%

“…In 1998 and 1999, Santos et al (2006) measured diffusive emission at Serra da Mesa (range from -6,048 to 10,178 mg.m -2 .d -1 to CH 4 and -5,360 to 5,903 mg.m -2 .d -1 to CO 2 ) and Três Marias Reservoir (range from 0.660 to 241 mg.m -2 .d -1 to CH 4 and -10,060 to 7,346 mg.m -2 .d -1 to CO 2 ). Thus, the highest emissions that we found in the present study were higher than those found by Santos et al (2006) in the previous study, with the exception of CH 4 emissions in Serra da Mesa, which in this study had lower values.…”

Section: Discussionmentioning

confidence: 99%

“…Research conducted by national and international teams has given successive contributions to the understanding of greenhouse gases emissions from Brazilian hydroelectric reservoirs (Rosa et al, 1994(Rosa et al, , 2003Guerin et al, 2006;Santos et al, 2006;Roland et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Diffusive emission of methane and carbon dioxide from two hydropower reservoirs in Brazil

Marcelino

Santos²,

Xavier³

et al. 2015

Braz. J. Biol.

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The role of greenhouse gas emissions from freshwater reservoirs and their contribution to increase greenhouse gas concentrations in the atmosphere is currently under discussion in many parts of the world. We studied CO 2 and CH 4 diffusive fluxes from two large neotropical hydropower reservoirs with different climate conditions. We used floating closed-chambers to estimate diffusive fluxes of these gaseous species. Sampling campaigns showed that the reservoirs studied were sources of greenhouse gases to the atmosphere. In the Serra da Mesa Reservoir, the CH 4 emissions ranged from 0.530 to 396.96 mg.m -2 .d -1 and CO 2 emissions ranged from -1,738.33 to 11,166.61 mg.m -2 .d -1 and in Três Marias Reservoir the CH 4 fluxes ranged 0.720 to 2,578.03 mg.m -2 .d -1 and CO 2 emission ranged from -3,037.80 to 11,516.64 to mg.m -2 .d -1 . There were no statistically significant differences of CH 4 fluxes between the reservoirs, but CO 2 fluxes from the two reservoirs studied were significantly different. The CO 2 emissions measured over the periods studied in Serra da Mesa showed some seasonality with distinctions between the wet and dry transition season. In Três Marias Reservoir the CO 2 fluxes showed no seasonal variability. In both reservoirs, CH 4 emissions showed a tendency to increase during the study periods but this was not statistically significant. These results contributed to increase knowledge about the magnitude of CO 2 and CH 4 emission in hydroelectric reservoirs, however due to natural variability of the data future sampling campaigns will be needed to better elucidate the seasonal influences on the fluxes of greenhouse gases.Keywords: hydropower, dissolved organic carbon, greenhouse gas effect, lakes, reservoirs, CO 2 emissions. Emissões difusivas de metano

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Section: Discussioncontrasting

confidence: 56%

Section: Discussionmentioning

confidence: 99%

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Diffusive emission of methane and carbon dioxide from two hydropower reservoirs in Brazil

Marcelino

Santos²,

Xavier³

et al. 2015

Braz. J. Biol.

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“…However, algal blooms hardly occurred in the summer because of high water velocity in the mainstream of the TGR then (Xin et al, 2011). Negative CO 2 flux was often reported in other reservoirs in the world, such as the Três Marias Reservoir in Brazil (dos Santos et al, 2006), Petit Saut Reservoir in French Guiana (Abril et al, 2005), and F. D. Roosevelt, Dworshak, Wallula, and New Melones Reservoirs in the western United States (Soumis et al, 2004). These negative fluxes were possibly related to high phytoplankton activity.…”

Section: Temporal Variation In Co 2 Fluxmentioning

confidence: 99%

Spatial and seasonal variability of CO2 flux at the air-water interface of the Three Gorges Reservoir

Yang¹,

Lu²,

Wang³

et al. 2013

Journal of Environmental Sciences

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Diffusive carbon dioxide (CO 2 ) emissions from the water surface of the Three Gorges Reservoir, currently the largest hydroelectric reservoir in the world, were measured using floating static chambers over the course of a yearlong survey. The results showed that the average annual CO 2 flux was (163.3 ± 117.4) mg CO 2 /(m 2 ·hr) at the reservoir surface, which was larger than the CO 2 flux in most boreal and temperate reservoirs but lower than that in tropical reservoirs. Significant spatial variations in CO 2 flux were observed at four measured sites, with the largest flux measured at Wushan (221.9 mg CO 2 /(m 2 ·hr)) and the smallest flux measured at Zigui (88.6 mg CO 2 /(m 2 ·hr)); these differences were probably related to the average water velocities at different sites. Seasonal variations in CO 2 flux were also observed at four sites, starting to increase in January, continuously rising until peaking in the summer (JuneAugust) and gradually decreasing thereafter. Seasonal variations in CO 2 flux could reflect seasonal dynamics in pH, water velocity, and temperature. Since the spatial and temporal variations in CO 2 flux were significant and dependent on multiple physical, chemical, and hydrological factors, it is suggested that long-term measurements should be made on a large spatial scale to assess the climatic influence of hydropower in China, as well as the rest of the world.

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“…Later, Brazilian hydroelectric reservoirs were shown to emit less carbon per energy production than thermonuclear power plants, with the exception of some cases of low power density, i.e. low energy production/flooded area ratio (Dos Santos et al, 2006). Finally, a recent inventory including several Brazilian reservoirs located both in the Amazon and in other biomes showed that the GHG emissions per energy produced (GHG/MWh) are lower in most reservoirs, regardless of their age (Ometto et al, submitted).…”

Section: Ghg Emissions -Hydropower Versus Other Electricity Sourcesmentioning

confidence: 99%

Greenhouse Gas Emissions from Hydroelectric Reservoirs: What Knowledge Do We Have and What is Lacking?

Mendonça¹,

Barros²,

Vidal³

et al. 2012

Greenhouse Gases - Emission, Measurement and Management

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Gross greenhouse gas fluxes from hydro-power reservoir compared to thermo-power plants

Cited by 172 publications

References 9 publications

Diffusive emission of methane and carbon dioxide from two hydropower reservoirs in Brazil

Diffusive emission of methane and carbon dioxide from two hydropower reservoirs in Brazil

Spatial and seasonal variability of CO2 flux at the air-water interface of the Three Gorges Reservoir

Greenhouse Gas Emissions from Hydroelectric Reservoirs: What Knowledge Do We Have and What is Lacking?

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