It would be beneficial to better understand the emission conditions through measuring the greenhouse gas(GHG) emission from the Xiangxi River,an anabranch of Three Gorges Reservoir,as well as to study the influence of the alga bloom on the GHG emission.Using floating chambers,CO2,CH4 and N2O emissions from the Xiangxi River were measured by 11 times field observations from October 2009 to October 2010.The observational result shows that the average CO2 emission is 76.52mg/(m2 · h),and the intensity is negat...