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2007，84（3/4）：281-294 .
［ 69］ LI Z，DU H，XIAO Y，et al . Carbon footprints of two large hydro-projects in China：Life-cycle assessment ac⁃
cording to ISO/TS 14067［J］. Renewable Energy，2017，114：534-546 .

From reservoir greenhouse gas emissions to hydropower carbon footprint：
methodology and advances

1 2
LI Zhe ，WANG Dianchang
（1. Chongqing Institute of Green and Intelligent Technology，Chinese Academy of Sciences， Chongqing 400714，China；
2. China Three Gorges Corporation，Beijing 100038，China）

Abstract：At present，there are still uncertainties and ambiguous aspects in the evaluation of the net green⁃
house gas （GHG） emissions of reservoirs and the carbon footprint of hydropower. To this end， this paper
firstly illustrated that reservoir construction and operation would regulate GHG emissions through the four ef⁃
fects， i.e.， inundation， obstruction， reconstruction， and consumption. Following the conceptual framework
proposed by the Intergovernmental Panel on Climate Change， the paper discussed the scientific connotation
and existing questions in the evaluation of reservoir net GHG emissions. The technical approach to evaluate
pre and post-impoundments GHG emissions of the reservoir was also suggested. In addition，it is clear that
hydropower carbon footprint refers to the total GHG emissions， in terms of carbon dioxide equivalents
（CO 2eq），from all anthropogenic activities during the life cycle of the hydropower project. After a review of
global cases， it is considered that the life cycle of a hydropower project should include four phases， i.e.，
preparation， construction， operation and maintenance， and decommissioning. Yet， there need more research
and applications to answer the questions on methodology development， system boundary， and interpretation
of hydropower carbon footprint. Soon， it suggests setting up the standard system for monitoring and evalua⁃
tion of reservoir GHG emissions， as well as the assessment of hydropower carbon footprint. Basic scientific
research on carbon cycling and carbon fluxes in reservoirs needs to be deepened to support the evaluation
of reservoir net GHG emissions. The innovation in the carbon management system is suggested to be based
on the improvement of the eco-environmental performance management system of hydropower enterprises.
Further activities are required to help the hydropower industry to find the right position and make break⁃
throughs and innovations in the path of mitigating climate change and achieving the "double carbon goal".
Keywords： hydropower production； greenhouse gas； net emissions； carbon neutrality； carbon gas manage⁃
ment

（责任编辑：王 婧）

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