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

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. | VNU Journal of Science: Earth and Environmental Sciences, Vol. 33, No. 2 (2017) 60-70 Development of Equations for Estimating Greenhouse Gas Emisions from the Son La Hydropower Reservoir Nguyen Thi The Nguyen1, Pham Van Hoang2, Nguyen Manh Khai3,* 1 Water Resources University, Tay Son, Dong Da, Hanoi, Vietnam Union of Science and Technology Vietnam, Xuan Dinh, Tay Ho, Hanoi, Vietnam 3 VNU University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam 2 Received 17 April 2017 Revised 28 April 2017; Accepted 28 June 2017 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 and 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. 1. Introduction harmful in terms of greenhouse gas emissions. Currently, hydroelectric power meets about 16% of the power supply of the world [2]. For countries which are dependent on