Spatio-temporal variations of GHG emissions from surface water of Xiangxi River in Three Gorges Reservoir region, China

Huang, Wenmin; Bi, Yonghong; Hu, Zhengyu; Zhu, Kunfu; Zhao, Wei; Yuan, Xi-gong

doi:10.1016/j.ecoleng.2015.04.088

Cited by 49 publications

(8 citation statements)

References 29 publications

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“…The nitrifiers and denitrifiers are also sensitive to temperature [49]. This outcome was in agreement with the results of the Pearson coefficients ( Figure 3) and were also analogous with the results of other field studies [23,24,58].…”

Section: Resultssupporting

confidence: 92%

“…SO 4 2− would also impact the nitrogen cycle [51], which may be another reason for the significant correlation among the three GHGs. The crucial aquatic factors were similar for CH 4 and CO 2 , with WT, DO, and Alk being recognized as key factors, which is in agreement with previous studies [20,23,26]. Chl-a was shown to have little effect on GHG emissions, which differs from previous research [14,20].…”

Section: Resultssupporting

confidence: 89%

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Recognizing Crucial Aquatic Factors Influencing Greenhouse Gas Emissions in the Eutrophication Zone of Taihu Lake, China

Wang

Cheng

et al. 2019

Sustainability

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Greenhouse gas (GHG) emissions, which are closely related to climate change and serious ecological instability, have attracted global attention. The estimation of crucial aquatic factors for the flux of GHGs in lakes is a key step in controlling and reducing GHG emissions. The importance of 14 aquatic factors for GHG emissions was estimated in Meiliang Bay, which is an eutrophication shallow bay in Taihu Lake in eastern China. The random forest (RF) method, which is an improved version of the classified and regression tree (CART) model, was employed. No distribution assumption on variables was required in this method and it could include nonlinear actions and interactions among factors. The results show significant positive correlations among the fluxes of CO2, CH4, and N2O. The most crucial factor influencing CO2 emissions is the water temperature (WT) followed by sulfate (SO42−), alkalinity (Alk), dissolved oxygen (DO), and nitrate (NO3−–N). The important factors for CH4 emissions are WT, SO42−, DO, Alk, and NO2−–N. The outcome for N2O, in which the key factor is NO2−–N, was slightly different from those of CO2 and CH4. A comprehensive ranking index (CRI) for the fluxes of all three GHGs was also calculated and showed that WT, NO2−–N, SO42−, DO, and Alk are the most crucial aquatic factors. These results indicate that increasing DO might be the most effective means of controlling GHG emissions in eutrophication lake bays. The role of SO42− in GHG emissions, which has previously been ignored, is also worth paying attention to. This study provides a useful basis for controlling GHG emissions in eutrophication shallow lake bays.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 89%

Recognizing Crucial Aquatic Factors Influencing Greenhouse Gas Emissions in the Eutrophication Zone of Taihu Lake, China

Wang

Cheng

et al. 2019

Sustainability

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“…But anthropogenic wastes in these underdeveloped areas are poorly managed and can be discharged into the tributaries intentionally, or following surface runoff, causing pollution of the tributaries. In this work, microplastic pollution was studied in Xiangxi River, a typical tributary within the TGR area which has attracted great research interest previously. − Planktonic samples were collected seasonally from upstream to downstream sites in the backwater area of Xiangxi River to reveal the spatial and temporal distribution patterns of microplastics in surface water and to investigate their relation with phytoplankton, zooplankton, and environmental variables. Sediment and fish samples were also collected and analyzed for microplastics to illustrate their fate.…”

Section: Introductionmentioning

confidence: 99%

Occurrence and Characteristics of Microplastic Pollution in Xiangxi Bay of Three Gorges Reservoir, China

Zhang

Xiong

et al. 2017

Environ. Sci. Technol.

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446

118

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Microplastic pollution in inland waters is receiving growing attentions. Reservoirs are suspected to be particularly vulnerable to microplastic pollution. However, very limited information is currently available on pollution characteristics of microplastics in reservoir ecosystems. This work studied the distribution and characteristics of microplastics in the backwater area of Xiangxi River, a typical tributary of the Three Gorges Reservoir. Microplastics were detected in both surface water and sediment with concentrations ranging from 0.55 × 10 to 342 × 10 items km and 80 to 864 items m, respectively. Polyethylene, polypropylene, and polystyrene were identified in surface water, whereas polyethylene, polypropylene, and polyethylene terephthalate, and pigments were observed in sediment. In addition, microplastics were also detected in the digestion tracts of 25.7% of fish samples, and polyethylene and nylon were identified. Redundancy analysis indicates a weak correlation between microplastics and water quality variables but a negative correlation with water level of the reservoir and Secchi depth. Results from this study confirm the presence of high abundance microplastics in reservoir impacted tributaries, and suggest that water level regulated hydrodynamic condition and input of nonpoint sources are important regulators for microplastic accumulation and distribution in the backwater area of reservoir tributaries.

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“…81 What's more, vast supplies and streams worldwide have been appeared to be vital wellsprings of ozone depleting substances with water temperature being one of the key controls of the outflow rates. 64,75,[83][84][85][86][87][88][89][90][91][92][93]…”

Section: Discussionmentioning

confidence: 99%

Overview effect of three gorges reservoir on the changing water temperature in the Yangtze river, China

Ali¹,

Abubaker²,

Islam³

2019

IJH

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The Yangtze River Basin is home to in excess of more than 400 million individuals and adds to about a portion of China's sustenance creation. Along these lines, getting ready for environmental change impacts on water asset releases is basic the readiness towards environmental change is necessary. The water temperature scope of the Yangtze River has changed essentially since the fruition of the Three Gorges Reservoir, which lead to a colossal impact on the water condition in the Three Gorges Reservoir. This investigation will analyze the effect of the Three Gorges Reservoir on the warm elements of the Yangtze River China. The investigation utilizes long haul perceptions of River Water Temperature. This paper centers on the investigation of the water temperature qualities of the standard qualities in the Three Gorges Reservoir and the slacking impact of water temperature on temperature structure contrasts in tributaries. The outcomes demonstrated that water temperature step by step diminished along the standard and stratified position water temperature of tributaries amid the warming time frame. Notwithstanding, water temperature step by step expanded along the standard, and water temperature stratification of the estuaries vanished in cooling period. After the consummation of the Three Gorges Reservoir, the effect of water temperature is predominantly reflected in slack qualities. Through further examinations, water temperature profiles will in general have great achievement when the Three Gorges Reservoir levels achieve 175m. This adds to water temperature contrasts in the tributary, which is the fundamental purpose behind water temperature structure changes. The methodology utilized here to evaluate the different commitments of atmosphere and human intercessions on River Water Temperature can be utilized to set logical rules for stream the executives, protection arranging and vital organic checking endeavors in controlled waterways.Citation: Ali RO, Abubaker SR, Islam S. Overview effect of three gorges reservoir on the changing water temperature in the Yangtze river, China. Int J Hydro. 2019;3(3):230-237.

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Spatio-temporal variations of GHG emissions from surface water of Xiangxi River in Three Gorges Reservoir region, China

Cited by 49 publications

References 29 publications

Recognizing Crucial Aquatic Factors Influencing Greenhouse Gas Emissions in the Eutrophication Zone of Taihu Lake, China

Recognizing Crucial Aquatic Factors Influencing Greenhouse Gas Emissions in the Eutrophication Zone of Taihu Lake, China

Occurrence and Characteristics of Microplastic Pollution in Xiangxi Bay of Three Gorges Reservoir, China

Overview effect of three gorges reservoir on the changing water temperature in the Yangtze river, China

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