Different hydrodynamic conditions on the deposition of organic carbon in sediment of two reservoirs

Zhao, Luo; Jian, Ma; Zheng, Shuang-Ling; Nan, Chun-Zi; Nie, Lanshi

doi:10.1007/s10750-015-2410-2

Cited by 23 publications

(4 citation statements)

References 34 publications

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“…Burial rates smaller than that of CUN were observed in in some reservoirs located in colder climate zones (boreal Eastmain reservoir: 32.9 g C m -2 yr -1 , Canada, Teodoru et al, 2012); temperate Xinanjiang reservoir: 43.4 g C m -2 yr -1 , China, (Wang et al, 2017); temperate Huairou water supply reservoir: 62.3 g C m -2 yr -1 , China, (Luo et al, 2016). However, some higher rates 20 than in CUN were also registered (temperate Shisanling hydroelectric reservoir: 100 g C m -2 yr -1 , China, (Luo et al, 2016); US reservoirs: range 149 to 363 g C m −2 yr −1 , (Clow et al, 2015); temperate Lake Wohlen: 1,113 ± 482 g C m -2 yr -1 , Switzerland, (Sobek et al, 2012). According to the latest global estimate, an OC burial rate of 1,418 ± 2,761 g C m −2 yr −1 was reported for reservoirs (Mendonça et al, 2017).…”

Section: Sediment Accumulation and Organic Carbon Burial Ratesmentioning

confidence: 93%

High organic carbon burial but high potential for methane ebullition in the sediments of an Amazonian reservoir

Quadra

Sobek

Paranaíba

et al. 2019

Preprint

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Abstract. Reservoir sediments sequester significant amounts of organic carbon (OC), but at the same time, high amounts of methane (CH4) can be produced during the degradation of sediment OC. Hydropower is expanding in the Amazon basin, but the potential effects of river damming on the biogeochemistry of the Amazon river system can at present not be gauged due to a lack of studies. Here we present results from the first investigation of OC burial and CH4 concentrations in the sediments of an Amazonian reservoir. We performed sub-bottom profiling, sediment coring and sediment pore water analysis in the Curu&#225;-Una reservoir (Amazon, Brazil) during rising and falling water periods. A mean sediment accumulation rate of 0.6&#8201;cm&#8201;yr&#8722;1 and a mean OC burial rate of 91&#8201;g&#8201;C&#8201;m&#8722;2&#8201;yr&#8722;1 were found, which is the highest OC burial rate on record for low-latitude reservoirs, probably resulting from high OC deposition onto the sediment compensating for high OC mineralization at 28&#8211;30&#8201;&#176;C water temperature. Elevated OC burial was found near the dam, and close to major river inflow areas. C&#8201;:&#8201;N ratios between 10.3 and 17 (mean &#177; SD: 12.9&#8201;&#177;&#8201;2.1) indicate that both land-derived and aquatic OC accumulate in CUN sediments. About 29&#8201;% of the sediment pore water samples had dissolved CH4 close to saturation concentration, a higher share than other hydroelectric reservoirs, indicating a high potential for CH4 ebullition, particularly in river inflow areas.

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Section: Sediment Accumulation and Organic Carbon Burial Ratesmentioning

confidence: 93%

High organic carbon burial but high potential for methane ebullition in the sediments of an Amazonian reservoir

Quadra

Sobek

Paranaíba

et al. 2019

Preprint

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“…Organic matter is a major component of suspended particles and fine sediment particles that determine many biogeochemical processes in marine environments (Bernasconi et al, 1997;Chen et al, 2012). Two natural sources of organic matter are generally considered in coastal ecosystems: allochthonous inputs and autochthonous production (Antonio and Richoux, 2014;Luo et al, 2016). Major sources of autochthonous organic matter include phytoplankton and aquatic macrophytes (Dalu and Froneman, 2016;Pearson et al, 2015).…”

Section: Fish Isotopic Nichesmentioning

confidence: 99%

Structure and seasonal variability in fish food webs in a small macrotidal estuary (Canche estuary, Eastern English Channel) based on stable carbon and nitrogen isotope analysis

Loc’h

Rolet²,

Veillet

et al. 2021

Regional Studies in Marine Science

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“…Additionally, dam construction promotes the intensive water-level fluctuations to cause landslides and debris flows and indirectly influence land types, which may increase the terrestrial POC in the reservoir (Yao et al, 2006;Luo et al, 2016;Iqbal et al, 2018;Zorzal-Almeida et al, 2018).…”

Section: Cascade Damming Effect On Input and Accumulation Of Pocmentioning

confidence: 99%

Methane accumulation affected by particulate organic carbon in upper Yangtze deep valley dammed cascade reservoirs, China

Zhang

et al. 2021

Preprint

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Abstract. Methane (CH4) emissions from freshwaters to the atmosphere have a profound impact on global atmospheric greenhouse gas (GHG) concentrations. Anthropogenic footprints such as dam construction and reservoir operation significantly changed the fate and transport of CH4 in freshwaters. The type of particulate organic carbon (POC) in reservoirs is a critical factor controlling CH4 production and emissions. However, little is known of how reservoir operation mediates the distribution of POC and regulates CH4 accumulation in cascade hydroelectric reservoirs. Here, spatial and temporal variations in POC and CH4 were explored in the Xiluodu (XLD) and Xiangjiaba (XJB) reservoirs which are deep valley dammed cascade reservoirs located in the main channel of the upper Yangtze River. Based on the δ13C-POC and N / C mole ratios of particulate organic matter, the results of multi-endmember stable isotope mixing models by a Bayesian model show that terrestrial POC and autochthonous POC accounted for approximately 56 ± 19 % and 42 ± 19 % (SD, n = 181) of POC, respectively. CH4 concentrations and δ13C-CH4 in the cascade reservoirs were potentially influenced by CH4 oxidation. Together with other physicochemical parameters and structural equation model, these results suggested that the input of terrestrial POC was dominantly influenced by water level variations and flow regulation due to reservoir operation. The cumulative effect of POC caused by cascade reservoirs was not apparent at a bimonthly scale. Terrestrial POC was more likely to dominate CH4 accumulation in cascade reservoirs under reservoir operation.

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Different hydrodynamic conditions on the deposition of organic carbon in sediment of two reservoirs

Cited by 23 publications

References 34 publications

High organic carbon burial but high potential for methane ebullition in the sediments of an Amazonian reservoir

High organic carbon burial but high potential for methane ebullition in the sediments of an Amazonian reservoir

Structure and seasonal variability in fish food webs in a small macrotidal estuary (Canche estuary, Eastern English Channel) based on stable carbon and nitrogen isotope analysis

Methane accumulation affected by particulate organic carbon in upper Yangtze deep valley dammed cascade reservoirs, China

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