The net GHG emissions of the China Three Gorges Reservoir: I. Pre-impoundment GHG inventories and carbon balance

doi:10.1016/j.jclepro.2020.120635

	The net GHG emissions of the China Three Gorges Reservoir: I. Pre-impoundment GHG inventories and carbon balance
	Li, Zhe 1; Sun, Zhiyu 2; Chen, Yongbo 2; Li, Chong 2; Pan, Zhenhua 3; Harby, Atle 4; Lv, Pingyu 5; Chen, Dan 3; Guo, Jinsong 6
刊名	JOURNAL OF CLEANER PRODUCTION
	2020-05-20
卷号	256 页码:13
关键词	Reservoir net GHG emissions Modeling framework Inventories System boundary Carbon budget Mass balance
ISSN号	0959-6526
DOI	10.1016/j.jclepro.2020.120635
通讯作者	Li, Zhe(lizhe@cigit.ac.cn) ; Sun, Zhiyu(sun_zhiyu@ctg.com.cn)
英文摘要	One of the paramount questions related to environmental and climate change impacts from hydropower and reservoirs, is how to quantify the greenhouse gas (GHG) emissions of dam construction and reservoir creation, mostly in terms of reservoir net GHG emissions. Net emissions are described as the emissions after impoundment subtracting the emissions before the reservoir was built (pre-impoundment). The evaluation of pre-impoundment GHG emissions is essential to answer the above questions, yet there are few related case studies. Herein, we proposed a conceptual framework to evaluate the pre-impoundment GHG emissions of China's Three Gorges Reservoir (TGR). Reservoir flooded areas prior to impoundment were divided into two categories: 1) flooded land, where pre-impoundment CO2 and CH4 fluxes from different historical land uses were estimated following tier 1 methodology of IPCC national inventories, and 2) river surface, where pre-impoundment CO2 fluxes were estimated by a calibrated two dimensional modified biogeochemical model with an air-water gas transfer module. An empirical regression model between measured air-water CO2 and CH4 fluxes in unflooded river reaches was used to estimate pre-impoundment river surface CH4 flux. The pre-impoundment GHG emissions of the TGR were 5.1 x 10(5) tCO(2eq).yr(-1), with 95% confidence intervals of 4.7-6.1 x 10(5) tCO(2eq).yr(-1). Approximately 46% of the pre-impoundment GHG emissions were from flooded land, while the rest 54% were from river surfaces. Mass balance indicated that approximately 72% of the downstream riverine C export was from the upstream river basin of the Yangtze River. Pre-impoundment C emissions were only similar to 6.58% of the total riverine C export downstream. Most of the C in the system was mainly from the upstream river basin of the Yangtze River; thus, an increase in anthropogenic loads of C and nutrients in the Three Gorges Reservoir Area did not result in an apparent increase in pre-impoundment river surface GHG emissions. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[51861125204] ; National Natural Science Foundation of China[51679226] ; China Three Gorges Corporation (Key research projects on the Greenhouse Gas Emissions of the Three Gorges Reservoir) ; Light ofWest China Program - Chinese Academy of Sciences
WOS研究方向	Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000524981300175
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/10788]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Li, Zhe; Sun, Zhiyu
作者单位	1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, CAS Key Lab Reservoir Environm, 266 Fangzheng Ave,Shuitu Hitech Ind Pk, Chongqing 400714, Peoples R China 2.China Three Gorges Corp, 1 South Yuyuantan Rd, Beijing 100038, Peoples R China 3.Danish Hydraul Inst, Fourth Floor,Bldg A 181,Guyi Rd, Shanghai 200235, Peoples R China 4.SINTEF Energy Res, POB 4761, N-7465 Trondheim, Norway 5.Chanidiang Water Resource Commiss, Water Environm Monitoring Ctr Upper Reach Changji, 410 Haier Rd, Chongqing 400021, Peoples R China 6.Chongqing Univ, Sch Environm & Ecol, 83 Shabeijie St,Campus B, Chongqing 400044, Peoples R China
推荐引用方式 GB/T 7714	Li, Zhe,Sun, Zhiyu,Chen, Yongbo,et al. The net GHG emissions of the China Three Gorges Reservoir: I. Pre-impoundment GHG inventories and carbon balance[J]. JOURNAL OF CLEANER PRODUCTION,2020,256:13.
APA	Li, Zhe.,Sun, Zhiyu.,Chen, Yongbo.,Li, Chong.,Pan, Zhenhua.,...&Guo, Jinsong.(2020).The net GHG emissions of the China Three Gorges Reservoir: I. Pre-impoundment GHG inventories and carbon balance.JOURNAL OF CLEANER PRODUCTION,256,13.
MLA	Li, Zhe,et al."The net GHG emissions of the China Three Gorges Reservoir: I. Pre-impoundment GHG inventories and carbon balance".JOURNAL OF CLEANER PRODUCTION 256(2020):13.