Greenhouse Gas Emissions from a Hydroelectric Reservoir (Brazil’s Tucuruí Dam) and the Energy Policy Implications

Greenhouse gas emissions from hydroelectric dams are oftenportrayed as nonexistent by the hydropower industry, and havebeen largely ignored in global calculations of emissions fromland-use change. Brazil’s Tucuruí Dam provides an example with important lessons for policy debates on Amazonian development and on how to assess the global warming impact ofdifferent energy options. Tucuruí is better from the pointof view of power density, and hence greenhouse gas emissions per unit of electricity, than both the average for existing dams in Amazonia and the planned dams that, if all built, wouldflood 3% of Brazil’s Amazon forest. Tucuruí’s emission of greenhouse gases in 1990 is equivalent to 7.0–10.1 × 106 tons of CO2-equivalent carbon, an amount substantially greater than the fossil fuel emission of Brazil’s biggest city, São Paulo. Emissions need to beproperly weighed in decisions on dam construction. Althoughmany proposed dams in Amazonia are expected to have positivebalances as compared to fossil fuels, substantial emissionsindicated by the present study reduce the benefits often attributed to the planned dams.

[1]  Marco Aurélio dos Santos,et al.  Are hydroelectric dams in the Brazilian Amazon significant sources of ‘greenhouse’ gases? , 1996, Environmental Conservation.

[2]  Sandrine Richard,et al.  Gaseous emissions and oxygen consumption in hydroelectric dams: A case study in French Guyana , 1997 .

[3]  R. Wassmann,et al.  Spatial and seasonal variation of methane emission from an Amazon floodplain lake , 1996 .

[4]  E. Davidson,et al.  Land use change and biogeochemical controls of nitrogen oxide emissions from soils in eastern Amazonia , 1999 .

[5]  Philip M. Fearnside,et al.  Deforestation and methane release from termites in Amazonia , 1996 .

[6]  Marc Lucotte,et al.  Production of the greenhouse gases CH4 and CO2 by hydroelectric reservoirs of the boreal region , 1995 .

[7]  Marc Lucotte,et al.  Comparison of greenhouse gas emissions from an old tropical reservoir with those from other reservoirs worldwide , 2000 .

[8]  Philip M. Fearnside,et al.  GREENHOUSE GASES FROM DEFORESTATION IN BRAZILIAN AMAZONIA: NET COMMITTED EMISSIONS , 1997 .

[9]  P. Crill,et al.  Methane flux from the Amazon River floodplain: Emissions during rising water , 1990 .

[10]  D. D. Adams,et al.  Cycling of reduced gases in the hydrosphere , 1996 .

[11]  Michael Keller,et al.  Emissions of N2O, CH4 and CO2 from tropical forest soils , 1986 .

[12]  Philip M. Fearnside,et al.  Time preference in global warming calculations: a proposal for a unified index , 2002 .

[13]  K. Shine.  Radiative Forcing of Climate Change , 2000 .

[14]  P. Fearnside.  The Potential of Brazil's Forest Sector for Mitigating Global Warming under the Kyoto Protocol , 2001 .

[15]  N. Polunin,et al.  The Decomposition of Emergent Macrophytes in Fresh Water , 1984 .

[16]  P. Fearnside.  Hydroelectric dams in Brazilian Amazonia: response to Rosa, Schaeffer & dos Santos , 1996, Environmental Conservation.

[17]  I. Walker,et al.  Observations on aquatic Macrophyte Dynamics In the Reservoir Of The Balbina Hydroelectric Powerplant, Amazonas State, Brazil , 1999 .

[18]  Robert F. Stallard,et al.  Methane emission by bubbling from Gatun Lake, Panama , 1994 .

[19]  J. Ometto,et al.  Role of the macrophyte community in CH4 production and emission in the tropical reservoir of Tucuruí, Pará State, Brazil , 2000 .

[20]  J. Houghton,et al.  Climate change 1995: the science of climate change. , 1996 .

[21]  Philip M. Fearnside,et al.  Why a 100-Year Time Horizon should be used for GlobalWarming Mitigation Calculations , 2002 .

[22]  Yadvinder Malhi,et al.  Carbon dioxide transfer over a Central Amazonian rain forest , 1998 .

[23]  E. Novo,et al.  Contribution of remote sensing techniques to the assessment of methane emission from large tropical reservoirs , 1994 .

[24]  P. Fearnside,et al.  Rainforest burning and the global carbon budget: Biomass, combustion efficiency, and charcoal formation in the Brazilian Amazon , 1993 .

[25]  Luiz Antonio Martinelli,et al.  Seasonal dynamics in methane emissions from the Amazon River floodplain to the troposphere , 1990 .

[26]  P. Fearnside.  Greenhouse Gas Emissions from Land-Use Change in Brazil’s Amazon Region , 2019, Global Climate Change and Tropical Ecosystems.

[27]  K. Shine.  Radiative Forcing of Climate Change , 2000 .

[28]  P. Fearnside.  Greenhouse-gas emissions from Amazonian hydroelectric reservoirs: the example of Brazil's Tucuruí Dam as compared to fossil fuel alternatives , 1997, Environmental Conservation.

[29]  P. Fearnside,et al.  Environmental Impacts of Brazil's Tucuruí Dam: Unlearned Lessons for Hydroelectric Development in Amazonia , 2001, Environmental management.

[30]  P. Fearnside.  Brazil's Balbina Dam: Environment versus the legacy of the Pharaohs in Amazonia , 1989 .

[31]  W. J. Junk,et al.  Investigações limnológicas e ictiológicas em Curuá-Una, a primeira represa hidrelétrica na Amazônia Central , 1981 .

[32]  H. Tian,et al.  Effect of interannual climate variability on carbon storage in Amazonian ecosystems , 1998, Nature.

[33]  John Moncrieff,et al.  Carbon Dioxide Uptake by an Undisturbed Tropical Rain Forest in Southwest Amazonia, 1992 to 1993 , 1995, Science.

[34]  Philip M. Fearnside,et al.  Social Impacts of Brazil's Tucuruí Dam , 1999, Environmental management.

[35]  Philip M. Fearnside,et al.  Accounting for time in Mitigating Global Warming through land-use change and forestry , 2000 .

[36]  Sandrine Richard,et al.  Long‐term greenhouse gas emissions from hydroelectric reservoirs in tropical forest regions , 1999 .

[37]  Philip M. Fearnside,et al.  Hydroelectric Dams in the Brazilian Amazon as Sources of ‘Greenhouse’ Gases , 1995, Environmental Conservation.

[38]  Roberto Schaeffer,et al.  Global warming potentials: The case of emissions from dams , 1995 .