Articles | Volume 15, issue 6
https://doi.org/10.5194/bg-15-1775-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/bg-15-1775-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 Mar 2018
Research article |
| 26 Mar 2018
| 26 Mar 2018
Carbon dioxide emissions from the flat bottom and shallow Nam Theun 2 Reservoir: drawdown area as a neglected pathway to the atmosphere
Chandrashekhar Deshmukh
Géosciences Environnement Toulouse (GET),
Université de Toulouse (UPS), 14 Avenue E. Belin, 31400 Toulouse,
France
Laboratoire d'Aérologie, Université de Toulouse,
CNRS UMR 5560, 14 Av. Edouard Belin, 31400, Toulouse,
France
Centre for Regulatory and Policy Research, TERI
University, New Delhi, India
now at: Asia Pacific Resources International Limited
(APRIL), Indonesia
Géosciences Environnement Toulouse (GET),
Université de Toulouse (UPS), 14 Avenue E. Belin, 31400 Toulouse,
France
IRD, UR 234, GET, 14 Avenue E. Belin, 31400, Toulouse,
France
Departamento de Geoquimica, Universidade Federal
Fluminense, Niterói, Brasil
Axay Vongkhamsao
Nam Theun 2 Power Company Limited (NTPC), Environment &
Social Division, Water Quality and Biodiversity Dept., Gnommalath Office,
P.O. Box 5862, Vientiane, Lao PDR
Sylvie Pighini
Nam Theun 2 Power Company Limited (NTPC), Environment &
Social Division, Water Quality and Biodiversity Dept., Gnommalath Office,
P.O. Box 5862, Vientiane, Lao PDR
now at: Innsbruck University, Institute of Ecology, 15
Sternwartestrasse, 6020 Innsbruck, Austria
now at: Foundation Edmund Mach,
FOXLAB-FEM, Via E. Mach 1, 38010 San Michele all'Adige,
Italy
Phetdala Oudone
Nam Theun 2 Power Company Limited (NTPC), Environment &
Social Division, Water Quality and Biodiversity Dept., Gnommalath Office,
P.O. Box 5862, Vientiane, Lao PDR
now at: Department of Environmental Science, Faculty of
Environmental Sciences, National University of Laos, Vientiane, Lao
PDR
Saysoulinthone Sopraseuth
Nam Theun 2 Power Company Limited (NTPC), Environment &
Social Division, Water Quality and Biodiversity Dept., Gnommalath Office,
P.O. Box 5862, Vientiane, Lao PDR
Arnaud Godon
Nam Theun 2 Power Company Limited (NTPC), Environment &
Social Division, Water Quality and Biodiversity Dept., Gnommalath Office,
P.O. Box 5862, Vientiane, Lao PDR
now at: Arnaud Godon Company, 44 Route de Genas, Nomade
Lyon, 69003 Lyon, France
Wanidaporn Rode
Nam Theun 2 Power Company Limited (NTPC), Environment &
Social Division, Water Quality and Biodiversity Dept., Gnommalath Office,
P.O. Box 5862, Vientiane, Lao PDR
Pierre Guédant
Nam Theun 2 Power Company Limited (NTPC), Environment &
Social Division, Water Quality and Biodiversity Dept., Gnommalath Office,
P.O. Box 5862, Vientiane, Lao PDR
Priscia Oliva
Géosciences Environnement Toulouse (GET),
Université de Toulouse (UPS), 14 Avenue E. Belin, 31400 Toulouse,
France
Stéphane Audry
Géosciences Environnement Toulouse (GET),
Université de Toulouse (UPS), 14 Avenue E. Belin, 31400 Toulouse,
France
Cyril Zouiten
Géosciences Environnement Toulouse (GET),
Université de Toulouse (UPS), 14 Avenue E. Belin, 31400 Toulouse,
France
Corinne Galy-Lacaux
Laboratoire d'Aérologie, Université de Toulouse,
CNRS UMR 5560, 14 Av. Edouard Belin, 31400, Toulouse,
France
Henri Robain
IRD, iEES-Paris, Centre IRD France-Nord, 32 avenue Henri
Varagnat, 93143 Bondy CEDEX, France
Olivier Ribolzi
Géosciences Environnement Toulouse (GET),
Université de Toulouse (UPS), 14 Avenue E. Belin, 31400 Toulouse,
France
Arun Kansal
Centre for Regulatory and Policy Research, TERI
University, New Delhi, India
Vincent Chanudet
Electriciteì de France, Hydro Engineering Centre,
Sustainable Development Dpt., Savoie Technolac, 73373 Le Bourget du Lac,
France
Stéphane Descloux
Electriciteì de France, Hydro Engineering Centre,
Sustainable Development Dpt., Savoie Technolac, 73373 Le Bourget du Lac,
France
Dominique Serça
Laboratoire d'Aérologie, Université de Toulouse,
CNRS UMR 5560, 14 Av. Edouard Belin, 31400, Toulouse,
France
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Latest update: 06 Dec 2025
Short summary
Based on an intense monitoring of CO2 concentrations and organic and inorganic carbon in the reservoir, in the rivers upstream and downstream, and of CO2 emissions from the drawdown area, we confirmed the importance of the flooded stock of organic matter as a source of C fueling emissions and we show that the drawdown area contributes, depending on the year, from 50 to 75 % of total annual gross emissions in the flat and shallow Nam Theun 2 Reservoir.
Based on an intense monitoring of CO2 concentrations and organic and inorganic carbon in the...
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