气候变化领域集成服务门户(CCPortal): Critical role of groundwater discharge in sustaining streamflow in a glaciated alpine watershed, northeastern Tibetan Plateau

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DOI	10.1016/j.scitotenv.2022.153578
	Critical role of groundwater discharge in sustaining streamflow in a glaciated alpine watershed, northeastern Tibetan Plateau
	Guo, Xiaoyan; Feng, Qi; Yin, Zhenliang; Si, Jianhua; Xi, Haiyang; Zhao, Yan
通讯作者	Guo, XY (通讯作者)，Chinese Acad Sci, Key Lab Ecohydrol Inland River Basin, Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China.
发表日期	2022
ISSN	0048-9697
EISSN	1879-1026
卷号	822
英文摘要	As the hydrologic buffering capacity of glaciers diminishes on climate warming, groundwater stored in the glaciated alpine watersheds becomes an important source of streamflow, quantifying the groundwater contribution to this streamflow is significant for better predictions of the impact of rapidly disappearing glaciers on regional water resources. However, the role of groundwater in sustaining streams remains unclear. Here, we selected the upper Shule River Basin (USRB) on the northeast Tibetan Plateau (NETP) as a case to address this knowledge gap through a comprehensive study of geochemistry and stable isotopes data, the application of an end member mixing model and the baseflow hydrograph separation program (HYSEP). Our results indicate that even though the potential sources of streamflow exhibited distinct monthly differences during December 2012-December 2013, the groundwater was the dominant contributor to streamflow generation in the USRB. The groundwater contributed 45% to 100% of the monthly mean streamflow, and the annual mean value of 70%. By contrast, the glacier-snow meltwater and precipitation only contributed 12% and 18% of the annual discharge. The volume contributed by groundwater was calculated as 9.93x10(8) m(3), approximately six times higher than the input of the glacier-snow meltwater (i.e., 1.63x10(8) m(3)). From 1954 to 2018, the volume of the groundwater discharge to the streamflow in the USRB continuously increased from 4.83x10(8) m(3)/a (65% of total streamflow) in the 1950s to 10.34 x10(8) m(3)/a (71% of total streamflow) in the 2010s, an increase of 2.14 times. The retreating glacier, as well as increasing precipitation and temperature, were determined to be the main reasons for the increase in groundwater discharge to the streamflow. Our findings suggest that groundwater contribution is more important than was previously thought in the glaciated alpine watersheds on the NETP.
关键词	CLIMATE-CHANGE STORAGE RIVER SEPARATION BASEFLOW CATCHMENTS EDGE
英文关键词	Alpine watershed; Groundwater; Streamflow; Hydrological processes; Stable isotopes; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000766801200002
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253763
作者单位	[Guo, Xiaoyan; Feng, Qi; Yin, Zhenliang; Si, Jianhua; Xi, Haiyang] Chinese Acad Sci, Key Lab Ecohydrol Inland River Basin, Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China; [Guo, Xiaoyan; Feng, Qi; Yin, Zhenliang; Si, Jianhua; Xi, Haiyang] Alax Desert Ecohydrol Expt Res Stn, Lanzhou, Peoples R China; [Guo, Xiaoyan; Feng, Qi; Yin, Zhenliang; Si, Jianhua; Xi, Haiyang] Qilian Mt Ecoenvironm Res Ctr Gansu Prov, Lanzhou, Peoples R China; [Zhao, Yan] Yellow River Engn Consulting Co Ltd, Zhengzhou, Peoples R China
推荐引用方式 GB/T 7714	Guo, Xiaoyan,Feng, Qi,Yin, Zhenliang,et al. Critical role of groundwater discharge in sustaining streamflow in a glaciated alpine watershed, northeastern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2022,822.
APA	Guo, Xiaoyan,Feng, Qi,Yin, Zhenliang,Si, Jianhua,Xi, Haiyang,&Zhao, Yan.(2022).Critical role of groundwater discharge in sustaining streamflow in a glaciated alpine watershed, northeastern Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,822.
MLA	Guo, Xiaoyan,et al."Critical role of groundwater discharge in sustaining streamflow in a glaciated alpine watershed, northeastern Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 822(2022).