Characteristics of CH4 Emission from Shaying River and Its Influence Factors
MA Pei
LI Yalin
QI Lanyue
TIAN Xianfeng
YANG Libiao
Abstract：The diffusive models were used to investigate the concentration,saturability and the diffusive fluxes of CH4 in Shaying River during July,August and September in 2015.The influence of environmental variables on CH4 emissions was also discussed.The results demonstrated that the concentration of CH4 in the surface water was 0.001 2～3.120 4 μmol/L.CH4 in upper stream of Jialu River was the highest.Estimated CH4 fluxes by the diffusive model were (2.295 4±2.073 9) μmol/(m2·h).Shaying River was the sources of CH4 which were in over saturation state during the day and night in high water period.CH4 fluxes in daytime (nighttime) in the upper stream of Jialu River accounts for 50％ of the total,while the fluxes of CH4 in daytime in Shaying River mainstream,significantly greater than that at night,accounts for 61.06％ of the total.Water temperature,DO and NH3-N generally controlled the concentration of CH4 in the surface water.
Keywords：Shaying RiverCH4 in surface waterfluxesinfluential factor
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 26-30,38 )