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《Environmental Science & Technology》 2017-02
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Characteristics of CH_4 Emission from Shaying River and Its Influence Factors

MA Pei;LI Yalin;QI Lanyue;TIAN Xianfeng;YANG Libiao;College of Resource & Environment,Henan Institute of Engineering;River and Coastal Environment Research Center,Chinese Research Academy of Environmental Science;  
The diffusive models were used to investigate the concentration,saturability and the diffusive fluxes of CH_4 in Shaying River during July,August and September in 2015.The influence of environmental variables on CH_4 emissions was also discussed.The results demonstrated that the concentration of CH_4 in the surface water was 0.001 2~3.120 4 μmol/L.CH_4 in upper stream of Jialu River was the highest.Estimated CH_4 fluxes by the diffusive model were(2.295 4±2.073 9) μmol/(m~2·h).Shaying River was the sources of CH_4 which were in over saturation state during the day and night in high water period.CH_4fluxes in daytime(nighttime) in the upper stream of Jialu River accounts for 50% of the total,while the fluxes of CH_4 in daytime in Shaying River mainstream,significantly greater than that at night,accounts for 61.06% of the total.Water temperature,DO and NH_3-N generally controlled the concentration of CH_4 in the surface water.
【Fund】: 国家自然科学基金(41401549 41203080)
【CateGory Index】: X522
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