Carbon dioxide emissions from the flat bottom and shallow Nam Theun 2 Reservoir: drawdown area as a neglected pathway to the atmosphere

Deshmukh, Chandrashekhar; Guérin, Frédéric; Vongkhamsao, Axay; Pighini, Sylvie; Oudone, Phetdala; Sopraseuth, Saysoulinthone; Godon, Arnaud; Rode, Wanidaporn; Guédant, Pierre; Oliva, Priscia; Audry, Stéphane; Zouiten, Cyril; Galy-Lacaux, Corinne; Robain, Henri; Ribolzi, Olivier; Kansal, Arun; Chanudet, Vincent; Descloux, Stéphane; Serça, Dominique

doi:https://doi.org/10.5194/bg-15-1775-2018

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.

Special issue:

Human impacts on carbon fluxes in Asian river systems

https://doi.org/10.5194/bg-15-1775-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 6

Research article

|

26 Mar 2018

Research article |

| 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, Frédéric Guérin, Axay Vongkhamsao, Sylvie Pighini, Phetdala Oudone, Saysoulinthone Sopraseuth, Arnaud Godon, Wanidaporn Rode, Pierre Guédant, Priscia Oliva, Stéphane Audry, Cyril Zouiten, Corinne Galy-Lacaux, Henri Robain, Olivier Ribolzi, Arun Kansal, Vincent Chanudet, Stéphane Descloux, and Dominique Serça

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Final revised paper (published on 26 Mar 2018)
Preprint (discussion started on 22 Sep 2017)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Biogeochemistry of river esrvoir systems', Anonymous Referee #1, 02 Nov 2017
- AC1: 'reply to reviewer 1', Frédéric Guérin, 13 Jan 2018
RC2: 'Reviewer Comments', Nittala Sarma, 07 Nov 2017
- AC2: 'Reply to reviewer 2', Frédéric Guérin, 13 Jan 2018

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Publish subject to minor revisions (review by editor) (30 Jan 2018) by V. V. S. S. Sarma

AR by Frédéric Guérin on behalf of the Authors (30 Jan 2018) Author's response Manuscript

ED: Publish as is (09 Feb 2018) by V. V. S. S. Sarma

AR by Frédéric Guérin on behalf of the Authors (09 Feb 2018) Manuscript

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.