Development of Equations for Estimating Greenhouse Gas Emisions from the Son La Hydropower Reservoir

Estimating Greenhouse Gas Emisions

Abstract

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.
Keywords

Greenhouse gas, hydropower reservoirs, water quality, regression equation

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