title: Temporal variation of methane flux from Xiangxi Bay of the Three Gorges Reservoir.
abstract: Three diel field campaigns and one monthly sampling campaign during June 2010-May 2011 were carried out to investigate the CH4 flux across the water-gas interface in Xiangxi Bay of the Three Gorges Reservoir, China. The average CH4 flux was much less than that reported from reservoirs in tropic and temperate regions. The photosynthesis of phytoplankton dominated the diel gas fluxes during alga bloom in spring and summer. The maximum monthly flux occurred in June 2010 and corresponded to the lowest water level. Water temperature, sediment temperature, and TOC did not have significant correlation with the monthly CH4 fluxes. Continuously decreasing hydrostatic pressure and the low water level resulted in more CH4 emission at the sediment-water during the discharging period, and thus increases the CH4 effluxes because the diffusion time through a thin water column is shorter and less CH4 may be oxidized compared with that in a long water column.
authors: 1] Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, 443002, China [2] Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China.
authors: Shangbin
authors: S
authors: Xiao
authors: Defu
authors: D
authors: Liu
authors: Yuchun
authors: Y
authors: Wang
authors: Zhengjian
authors: Z
authors: Yang
authors: Wenzhong
authors: W
authors: Chen
mesh_terms: D002681:China; D060106:Lakes / Q000032:analysis* / Q000737:chemistry*; D008697:Methane / Q000032:analysis*; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical; D008697:Methane
references: J Environ Sci (China). 2011;23(12):2029-33
references: 22432334
references: Science. 1989 Jul 21;245(4915):286-90
references: 17834679
references: Chemosphere. 2005 Jun;59(11):1697-702
references: 15894055
references: J Environ Manage. 2012 Oct 15;108:54-65
references: 22658991
references: Water Res. 2012 May 1;46(7):2121-30
references: 22336626
references: Appl Environ Microbiol. 1976 Jan;31(1):99-107
references: 821396
references: Res Microbiol. 2011 Nov;162(9):832-47
references: 21704700
references: Environ Monit Assess. 2011 May;176(1-4):125-41
references: 20563898
references: Waste Manag. 2012 May;32(5):879-89
references: 22143049
references: FEMS Microbiol Rev. 2010 Jul;34(4):496-531
references: 20236329