Sediment Trapping by Dams Creates Methane Emission Hot Spots

Andreas Maeck, Tonya DelSontro, Daniel F. McGinnis, Helmut Fischer, Sabine Flury, Mark Schmidt, Peer Fietzek, Andreas Lorke

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Inland waters transport and transform substantial amounts of carbon and account for similar to 18% of global methane emissions. Large reservoirs with higher areal methane release rates than natural waters contribute significantly to freshwater emissions. However, there are millions of small dams worldwide that receive and trap high loads of organic carbon and can therefore potentially emit significant amounts of methane to the atmosphere. We evaluated the effect of damming on methane emissions in a central European impounded river. Direct comparison of riverine and reservoir reaches, where sedimentation in the latter is increased due to trapping by dams, revealed that the reservoir reaches are the major source of methane emissions (similar to 0.23 mmol CH4 m(-2) d(-1) vs similar to 19.7 mmol CH4 m(-2) d(-1), respectively) and that areal emission rates far exceed previous estimates for temperate reservoirs or rivers. We show that sediment accumulation correlates with methane production and subsequent ebullitive release rates and may therefore be an excellent proxy for estimating methane emissions from small reservoirs. Our results suggest that sedimentation-driven methane emissions from dammed river hot spot sites can potentially increase global freshwater emissions by up to 7%.
OriginalsprogEngelsk
TidsskriftEnvironmental Science & Technology (Washington)
Vol/bind47
Udgave nummer15
Sider (fra-til)8130-8137
ISSN0013-936X
DOI
StatusUdgivet - 6. aug. 2013

Citer dette

Maeck, A., DelSontro, T., McGinnis, D. F., Fischer, H., Flury, S., Schmidt, M., ... Lorke, A. (2013). Sediment Trapping by Dams Creates Methane Emission Hot Spots. Environmental Science & Technology (Washington), 47(15), 8130-8137. https://doi.org/10.1021/es4003907
Maeck, Andreas ; DelSontro, Tonya ; McGinnis, Daniel F. ; Fischer, Helmut ; Flury, Sabine ; Schmidt, Mark ; Fietzek, Peer ; Lorke, Andreas. / Sediment Trapping by Dams Creates Methane Emission Hot Spots. I: Environmental Science & Technology (Washington). 2013 ; Bind 47, Nr. 15. s. 8130-8137.
@article{96157749101242cbb8066bf55972157e,
title = "Sediment Trapping by Dams Creates Methane Emission Hot Spots",
abstract = "Inland waters transport and transform substantial amounts of carbon and account for similar to 18{\%} of global methane emissions. Large reservoirs with higher areal methane release rates than natural waters contribute significantly to freshwater emissions. However, there are millions of small dams worldwide that receive and trap high loads of organic carbon and can therefore potentially emit significant amounts of methane to the atmosphere. We evaluated the effect of damming on methane emissions in a central European impounded river. Direct comparison of riverine and reservoir reaches, where sedimentation in the latter is increased due to trapping by dams, revealed that the reservoir reaches are the major source of methane emissions (similar to 0.23 mmol CH4 m(-2) d(-1) vs similar to 19.7 mmol CH4 m(-2) d(-1), respectively) and that areal emission rates far exceed previous estimates for temperate reservoirs or rivers. We show that sediment accumulation correlates with methane production and subsequent ebullitive release rates and may therefore be an excellent proxy for estimating methane emissions from small reservoirs. Our results suggest that sedimentation-driven methane emissions from dammed river hot spot sites can potentially increase global freshwater emissions by up to 7{\%}.",
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Maeck, A, DelSontro, T, McGinnis, DF, Fischer, H, Flury, S, Schmidt, M, Fietzek, P & Lorke, A 2013, 'Sediment Trapping by Dams Creates Methane Emission Hot Spots', Environmental Science & Technology (Washington), bind 47, nr. 15, s. 8130-8137. https://doi.org/10.1021/es4003907

Sediment Trapping by Dams Creates Methane Emission Hot Spots. / Maeck, Andreas; DelSontro, Tonya; McGinnis, Daniel F.; Fischer, Helmut; Flury, Sabine ; Schmidt, Mark; Fietzek, Peer; Lorke, Andreas.

I: Environmental Science & Technology (Washington), Bind 47, Nr. 15, 06.08.2013, s. 8130-8137.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Sediment Trapping by Dams Creates Methane Emission Hot Spots

AU - Maeck, Andreas

AU - DelSontro, Tonya

AU - McGinnis, Daniel F.

AU - Fischer, Helmut

AU - Flury, Sabine

AU - Schmidt, Mark

AU - Fietzek, Peer

AU - Lorke, Andreas

PY - 2013/8/6

Y1 - 2013/8/6

N2 - Inland waters transport and transform substantial amounts of carbon and account for similar to 18% of global methane emissions. Large reservoirs with higher areal methane release rates than natural waters contribute significantly to freshwater emissions. However, there are millions of small dams worldwide that receive and trap high loads of organic carbon and can therefore potentially emit significant amounts of methane to the atmosphere. We evaluated the effect of damming on methane emissions in a central European impounded river. Direct comparison of riverine and reservoir reaches, where sedimentation in the latter is increased due to trapping by dams, revealed that the reservoir reaches are the major source of methane emissions (similar to 0.23 mmol CH4 m(-2) d(-1) vs similar to 19.7 mmol CH4 m(-2) d(-1), respectively) and that areal emission rates far exceed previous estimates for temperate reservoirs or rivers. We show that sediment accumulation correlates with methane production and subsequent ebullitive release rates and may therefore be an excellent proxy for estimating methane emissions from small reservoirs. Our results suggest that sedimentation-driven methane emissions from dammed river hot spot sites can potentially increase global freshwater emissions by up to 7%.

AB - Inland waters transport and transform substantial amounts of carbon and account for similar to 18% of global methane emissions. Large reservoirs with higher areal methane release rates than natural waters contribute significantly to freshwater emissions. However, there are millions of small dams worldwide that receive and trap high loads of organic carbon and can therefore potentially emit significant amounts of methane to the atmosphere. We evaluated the effect of damming on methane emissions in a central European impounded river. Direct comparison of riverine and reservoir reaches, where sedimentation in the latter is increased due to trapping by dams, revealed that the reservoir reaches are the major source of methane emissions (similar to 0.23 mmol CH4 m(-2) d(-1) vs similar to 19.7 mmol CH4 m(-2) d(-1), respectively) and that areal emission rates far exceed previous estimates for temperate reservoirs or rivers. We show that sediment accumulation correlates with methane production and subsequent ebullitive release rates and may therefore be an excellent proxy for estimating methane emissions from small reservoirs. Our results suggest that sedimentation-driven methane emissions from dammed river hot spot sites can potentially increase global freshwater emissions by up to 7%.

U2 - 10.1021/es4003907

DO - 10.1021/es4003907

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VL - 47

SP - 8130

EP - 8137

JO - Environmental Science & Technology (Washington)

JF - Environmental Science & Technology (Washington)

SN - 0013-936X

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Maeck A, DelSontro T, McGinnis DF, Fischer H, Flury S, Schmidt M et al. Sediment Trapping by Dams Creates Methane Emission Hot Spots. Environmental Science & Technology (Washington). 2013 aug 6;47(15):8130-8137. https://doi.org/10.1021/es4003907