Marine and Freshwater Research Marine and Freshwater Research Society
Advances in the aquatic sciences

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Seasonal and Diurnal Methane and Carbon Dioxide Emissions from the Littoral Area of the Miyun Reservoir in Beijing, China

Gang Li , Hongli Li , Meng Yang , Ting Lei , Mingxiang Zhang , Peter Bridgewater , Shuhong Wu , Guangchun Lei


Reservoirs have been regarded as hotspots for greenhouse gas emissions since the 1990s. However, there is scant research about littoral zones of reservoirs. In this study, static closed chamber and gas chromatograph techniques were used to measure methane (CH4) and carbon dioxide (CO2) flux in the littoral area of a temperate reservoir from 2009 to 2010. The littoral area comprises three zones; viz supralittoral, eulittoral, and infralittoral. The patterns of CH4 and CO2 emissions from these three littoral zones were significantly different during the sampling periods, with the eulittoral zone having the highest CH4 flux and the supralittoral zone having the highest CO2 flux. Temperature and biomass correlated with CH4 and CO2 emissions. Measurement of CO2 emissions after removing vegetation, varied in each zone and by time of sampling. A large littoral area of the Reservoir will be submerged and converted to a pelagic area with deep standing water after the South to North Water Transfer (SNWT) Project concludes, which will be completed in 2050. Our results suggest further research and monitoring is needed and should focus on likely effects from extreme climate events and human-mediated factors on GHG emissions.

MF17114  Accepted 23 September 2017

© CSIRO 2017