气候变化研究进展2024，Vol.20Issue(1)：107-117,11.DOI:10.12006/j.issn.1673-1719.2023.188
澜沧江梯级水库CO2和CH4排放通量研究
Study on CO2 and CH4 emission fluxes from Lancang River cascade reservoirs
摘要
Abstract
The greenhouse effect has become an important global climate issue,and inland waters are an important source of emissions of the greenhouse gases(GHG)CO2 and CH4.It has been found that hydropower energy,once considered clean,may cause an increase in CO2 and CH4 emissions from river waters as a result of damming and impounding water.In order to actively respond to the national"Dual-Carbon"goal and clarify the impact of damming and impounding on GHG emissions from water bodies,the G-res Tool,a model for evaluating the net flux of GHG emissions from reservoirs,was used to simulate the CO2 and CH4 emission fluxes before and after impoundment of 10 completed terrace reservoirs on the main stream of the Lancang River.The average annual GHG(CO2 and CH4)emission flux of the 10 reservoirs after impoundment is 162.81 g CO2e/(m2∙a),which is much lower than the global average level of reservoirs,but all of them behave as"sources"of GHGs,with an overall upward trend from upstream to downstream.Emissions are dominated by CO2,with an annual CO2 emission fluxes 36 times that of CH4,which is dominated by diffuse and off-gas emissions.After considering the GHG emissions prior to reservoir impoundment and the impacts of unrelated anthropogenic sources,the average annual net flux of GHG(CO2 and CH4)emissions from the reservoir is 225.70 g CO2e/(m2∙a),suggesting that damming increases the release of GHGs from the reservoir waters.However,hydropower is still a relatively clean energy compared to thermal power generation.关键词
澜沧江/梯级电站/水库温室气体/模型/净排放通量Key words
Lancang River/Terraced power station/Reservoir greenhouse gas/Model/Net emission flux引用本文复制引用
陶雨晨,傅开道,张洁,杨丽莎,袁茜..澜沧江梯级水库CO2和CH4排放通量研究[J].气候变化研究进展,2024,20(1):107-117,11.基金项目
国家自然科学基金(42061006,41571032) （42061006,41571032）
云南大学专业学位研究生实践创新基金项目(ZC-22222960) （ZC-22222960）
