Estimating Greenhouse Gas Emisions
Nguyen Thi The Nguyen, Pham Van Hoang, Nguyen Manh Khai

Main Article Content


Emissions of greenhouse gases such as CO2 and CH4 from artificial reservoirs,
especially wide lakes in the tropics as the Son La hydropower reservoir, are leading to global
warming. CO2 and CH4 gases in hydropower reservoirs are caused by the decomposition of
organic matter in the lakes. In this study, regression analysis was used for estimating the
relationships among water quality parameters measured at the Son La hydropower reservoir and
the fluxes of greenhouse gas emissions from the reservoir. The regression analysis was also
applied to develop regression equations predicting emissions of greenhouse gases from the lake.
Results of study showed that the CO2 emission from the Son La hydropower reservoir could be
predictable from several water quality parameters of which 4 main factors are temperature, DO,
alkalinity andpH. The amount of CH4 emission from the Son La hydropower reservoir has solid
relationships with 3 main factors, including temperature, COD and pH. The regression equations
predicting CO2 and CH4 with the correlation coefficient of 0.93 and 0.92 have been tested with
real data and gave the good results. Since, they could be introduced in reality.

Greenhouse gas, hydropower reservoirs, water quality, regression equation


[1] Huttunen, J.T.; Vaisanen, T.S.; Hellsten, S.K.; Heikkinen, M.; Nykanen, H.; Jungner, H.; Niskanen, A.; Virtanen, M.O.; Lindqvist, O.V.; Nenonen, O.S. & Martikainen, P.J., Fluxes of CH4, CO2, and N2O in hydroelectric reservoirs Lokka and Porttipahta in the northern boreal zone in Finland. Global Biogeochemical Cycles, Vol.16. No.1, Mar, 2002, 886.
[2] Guerin, F., and G. Abril, Significance of pelagic aerobic methane oxidation in the methane and carbon budget of a tropical reservoir. J. Geophys. Res. Biogeosci, 2007, 112.
[3] Abril, G., Guerin, F., Richard, S., Delmas, R., Galy-Lacaux, C., Gosse, P., Tremblay, A., Varfalvy, L., Dos Santos, M.A. & Matvienko, B., Carbon dioxide and methane emissions and the carbon budget of a 10-year old tropical reservoir (Petit Saut, French Guiana). Global Biogeochemical Cycles, Vol.19. No.4, Oct, 2005.
[4] Raquel Mendonça, Nathan Barros, Luciana O. Vidal, Felipe Pacheco1, Sarian Kosten and Fábio Roland, Greenhouse Gas Emissions from Hydroelectric Reservoirs: What Knowledge Do We Have and What is Lacking?, Greenhouse Gases – Emission, Measurement and Management, 2012, 55.
[5] Yang, L., F. Lu, X. Wang, X. Duan, W. Song, B. Sun, S. Chen, Q. Zhang, P. Hou, F. Zheng, Y. Zhang, X. Zhou, Y. Zhou, and Z. Ouyang, Surface methane emissions from different land use types during various water levels in three major drawdown areas of the Three Gorges Reservoir. J. Geophys. Res., 2012, 117.
[6] Rudd JWM, Harris R, Kelly CA, Hecky RE., Are hydroelectric reservoirs significant sources of greenhouse gases?. Ambio 22, 1993, 246.
[7] Barros, N.; Cole, J.J.; Tranvik, L.J.; Prairie, Y.T.; Bastviken, D.; Huszar, V.L.M.; Del Giorgio, P. & Roland, F., Carbon emission from hydroelectric reservoirs linked to reservoir age and latitude. Nature Geoscience, Vol.4. No.9, Sep, 2011, 593.
[8] Kelly CA., Increases in fluxes of greenhouse gases and methyl mercury following flooding of an experimental reservoir. Environmental Science and Technology 31, 1997, 1334.
[9] Rolston, D.E., Gases flux. In: A. Klute, editor, Methods of soil analysis. Part 1. Physical and mineralogical methods. SSSA Book Ser. 5. SSSA, Madison, WI. 1986, 1103.
[10] Amit Kumar, M.P. Sharma, Impact of water quality on GHG emissions from Hydropower Reservoir, J. Mater. Environ. Sci. 5 (1), 2014, 95.
[11] Diem, T.; Koch, S.; Schwarzenbach, S.; Wehrli, B. & Schubert, C.J., Greenhouse-gas (CH4, N2O and CO2) emissions from hydroelectric reservoirs in Switzerland, 2007.
[12] Ostrovsky, I., D. F. McGinnis, L. Lapidus, and W. Eckert, Quantifying gas ebullition with echosounder: the role of methane transport by bubbles in a medium-sized lake, Limnol. Oceanogr. Meth., 6, 2008, 105.