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Changes in Water Chemistry Associated with Rainstorm Events Increase Carbon Emissions from the Inflowing River Mouth of a Major Drinking Water Reservoir

Li, Yuyang (author)
Chinese Acad Sci, Nanjing Inst Geog & Limnol, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China.;Nanchang Univ, Sch Resources Environm & Chem Engn, Key Lab Poyang Lake Environm & Resource Utilizat, Minist Educ, Nanchang 330031, Peoples R China.
Zhou, Yongqiang (author)
Chinese Acad Sci, Nanjing Inst Geog & Limnol, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
Zhou, Lei (author)
Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China.
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Zhang, Yunlin (author)
Chinese Acad Sci, Nanjing Inst Geog & Limnol, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
Xu, Hai (author)
Chinese Acad Sci, Nanjing Inst Geog & Limnol, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
Jang, Kyoung-Soon (author)
Korea Basic Sci Inst, Biochem Anal Grp, Cheongju 28119, South Korea.
Kothawala, Dolly (author)
Uppsala universitet,Limnologi
Spencer, Robert G. M. (author)
Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA.
Jeppesen, Erik (author)
Aarhus Univ, Dept Ecosci, DK-8000 Aarhus, Denmark.;Aarhus Univ, Ctr Water Technol WATEC, DK-8000 Aarhus, Denmark.;Sino Danish Ctr Educ & Res, Beijing 100190, Peoples R China.;Middle East Tech Univ, Dept Biol Sci, Limnol Lab, TR-06800 Ankara, Turkey.;Middle East Tech Univ, Ctr Ecosyst Res & implementat, TR-06800 Ankara, Turkey.;Middle East Tech Univ, Inst Marine Sci, TR-33731 Mersin, Turkey.
Brookes, Justin D. (author)
Univ Adelaide, Water Res Ctr, Sch Biol Sci, Adelaide, SA 5005, Australia.
Davidson, Thomas A. (author)
Aarhus Univ, Dept Ecosci, DK-8000 Aarhus, Denmark.;Aarhus Univ, Ctr Water Technol WATEC, DK-8000 Aarhus, Denmark.
Wu, Fengchang (author)
Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China.
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Chinese Acad Sci, Nanjing Inst Geog & Limnol, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China;Nanchang Univ, Sch Resources Environm & Chem Engn, Key Lab Poyang Lake Environm & Resource Utilizat, Minist Educ, Nanchang 330031, Peoples R China. Chinese Acad Sci, Nanjing Inst Geog & Limnol, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China. (creator_code:org_t)
2022-10-21
2022
English.
In: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 56:22, s. 16494-16505
Related links:
https://urn.kb.se/re...
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Large reservoirs are hotspots for carbon emissions, and the continued input and decomposition of terrestrial dissolved organic matter (DOM) from upstream catchments is an important source of carbon emissions. Rainstorm events can cause a surge in DOM input; however, periodic sampling often fails to fully capture the impact of these discrete rainstorm events on carbon emissions. We conducted a set of frequent observations prior to and following a rainstorm event in a major reservoir Lake Qiandao (China; 580 km(2)) from June to July 2021 to investigate how rainstorms alter water chemistry and CO2 and CH4 emissions. We found that the mean CO2 efflux (FCO2) (13.2 +/- 9.3 mmol m(-)(2) d(-1)) and CH4 efflux (FCH4) (0.12 +/- 0.02 mmol m(-2) d(-1)) in the postrainstorm campaign were significantly higher than those in the prerainstorm campaign (-3.8 +/- 3.0 and +0.06 +/- 0.02 mmol m(-)(2) d(-)(1), respectively). FCO2 and FCH4 increased with increasing nitrogen and phosphorus levels, elevated DOM absorption (a(350)), specific UV absorbance SUVA(254), and terrestrial humic-like fluorescence. Furthermore, FCO2 and FCH4 decreased with increasing chlorophyll-a (Chl-a), dissolved oxygen (DO), and pH. A five-day laboratory anoxic bioincubation experiment further revealed a depletion of terrestrial-DOM concurrent with increased CO2 and CH4 production. We conclude that rainstorms boost the emission of CO2 and CH4 fueled by the surge and decomposition of fresh terrestrially derived biolabile DOM in this and likely many other reservoir's major inflowing river mouths.

Subject headings

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)

Keyword

dissolved organic matter (DOM)
CH4
reservoir
FT-ICR MS
CO2

Publication and Content Type

ref (subject category)
art (subject category)

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