Articles | Volume 13, issue 6
https://doi.org/10.5194/bg-13-1919-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-13-1919-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
30 Mar 2016
Research article |
| 30 Mar 2016
Low methane (CH4) emissions downstream of a monomictic subtropical hydroelectric reservoir (Nam Theun 2, Lao PDR)
Chandrashekhar Deshmukh
Université de Toulouse, UPS GET, 14 Avenue E. Belin, 31400
Toulouse, France
Laboratoire d'Aérologie, Université de
Toulouse, CNRS UMR5560, 14 Av. Edouard Belin, 31400, Toulouse, France
Centre for Regulatory and Policy Research, TERI University, New
Delhi, India
now at: Nam Theun 2 Power Company Limited
(NTPC), Environment & Social Division, Water Quality and
Biodiversity Dept., Gnommalath Office, PO Box 5862, Vientiane, Lao PDR
Université de Toulouse, UPS GET, 14 Avenue E. Belin, 31400
Toulouse, France
Institut de Recherche pour le Développement (IRD),
UR234, GET; 14 Avenue E. Belin, 31400, Toulouse, France
Departamento de Geoquimica, Universidade Federal Fluminense,
Niteroi-RJ, Brazil
David Labat
Université de Toulouse, UPS GET, 14 Avenue E. Belin, 31400
Toulouse, France
Sylvie Pighini
Nam Theun 2 Power Company Limited (NTPC),
Environment & Social Division, Water Quality and
Biodiversity Dept., Gnommalath Office, PO Box 5862, Vientiane,
Lao PDR
now at: Innsbruck University, Institute of Ecology, 15
Sternwartestrasse, 6020 Innsbruck, Austria and Foundation
Edmund Mach, FOXLAB-FEM, Via E. Mach 1, 38010 San Michele all'Adige, Italy
Axay Vongkhamsao
Nam Theun 2 Power Company Limited (NTPC),
Environment & Social Division, Water Quality and
Biodiversity Dept., Gnommalath Office, PO Box 5862, Vientiane,
Lao PDR
Pierre Guédant
Nam Theun 2 Power Company Limited (NTPC),
Environment & Social Division, Water Quality and
Biodiversity Dept., Gnommalath Office, PO Box 5862, Vientiane,
Lao PDR
Wanidaporn Rode
Nam Theun 2 Power Company Limited (NTPC),
Environment & Social Division, Water Quality and
Biodiversity Dept., Gnommalath Office, PO Box 5862, Vientiane,
Lao PDR
Arnaud Godon
Nam Theun 2 Power Company Limited (NTPC),
Environment & Social Division, Water Quality and
Biodiversity Dept., Gnommalath Office, PO Box 5862, Vientiane,
Lao PDR
now at: Arnaud Godon Company, 44 Route de Genas, Nomade Lyon, 69003
Lyon, France
Vincent Chanudet
Electricité de France, Hydro Engineering Centre,
Sustainable Development Dpt, Savoie Technolac, 73373 Le
Bourget du Lac, France
Stéphane Descloux
Electricité 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 UMR5560, 14 Av. Edouard Belin, 31400, Toulouse, France
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Latest update: 08 Nov 2025
Short summary
Methane (CH4) emissions from hydroelectric reservoirs could represent a significant fraction of global CH4 emissions from inland waters and wetlands. The first quantification of emissions downstream of a subtropical reservoir shows that they contribute only 10 to 30 % of total CH4 emissions from the reservoir. This surprisingly low contribution is due to the seasonal reservoir overturn and the effect of the turbine on re-aerating the reservoir water column.
Methane (CH4) emissions from hydroelectric reservoirs could represent a significant fraction of...
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