气候变化领域集成服务门户(CCPortal): Study on the contribution of cryosphere to runoff in the cold alpine basin: A case study of Hulugou River Basin in the Qilian Mountains

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DOI	10.1016/j.gloplacha.2014.10.001
	Study on the contribution of cryosphere to runoff in the cold alpine basin: A case study of Hulugou River Basin in the Qilian Mountains
	Li Zongxing; Feng Qi; Liu Wei; Wang Tingting; Cheng Aifang; Gao Yan; Guo Xiaoyan; Pan Yanhui; Li Jianguo; Guo Rui; Jia Bing
发表日期	2014
ISSN	0921-8181
EISSN	1872-6364
卷号	122
英文摘要	Global warming would inevitably lead to the increased glacier-snow meltwater and mountainous discharge. Taking an example the Hulugou River Basin in the Qilian Mountains, this study confirmed the contribution of cryosphere to runoff by means of the isotope hydrograph separation. The hydro-geochemistry and the isotope geochemistry suggested that both the meltwater and rainwater infiltrated into the subsurface and fed into the river runoff of the Hulugou River Basin in the form of springs. The isotopic composition of river water and underground water was close to the Local Meteoric Water Line, and the delta O-18 and delta D ranged among precipitation, glacier-snow meltwater and frozen soil meltwater. The results indicated that 68% of the recharge of the Hulugou River water was the precipitation, thereinto, glacier-snow meltwater and frozen soil meltwater contributing 11% and 21%, respectively. For tributary-1, precipitation accounted for 77% of the total stream runoff, with frozen soil meltwater accounting for 17%, and glacier-snow meltwater only supplied 6%. During the sampling period, the contribution of surface runoff from precipitation was 44% to tributary-2, and glacier-snow meltwater had contributed 42%; only 14% from frozen soil meltwater. For tributary-3, precipitation accounted for 63% of the total runoff, and other 37% originated from the frozen soil meltwater. According to the latest observational data, the glacier-snow meltwater has accounted for 11.36% of the total runoff in the stream outlet, in which the calculation has been verified by hydrograph separation. It is obvious that the contribution of ayosphere has accounted for 1/3 of the outlet runoff in the Hulugou River Basin, which has been an important part of river sources. This study demonstrated that the alpine regions of western China, especially those basins with glaciers, snow and frozen soil, have played a crucial role in regional water resource provision under global warming. (C) 2014 Elsevier B.V. All rights reserved.
关键词	isotope geochemistry cryosphere hydrograph separation China
学科领域	Physical Geography; Geology
语种	英语
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
来源期刊	GLOBAL AND PLANETARY CHANGE
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/111742
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Hydrol & Water Resources Engn Res Ctr, Key Lab Ecohydrol Inland River Basin Gansu, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Li Zongxing,Feng Qi,Liu Wei,et al. Study on the contribution of cryosphere to runoff in the cold alpine basin: A case study of Hulugou River Basin in the Qilian Mountains[J]. 中国科学院西北生态环境资源研究院,2014,122.
APA	Li Zongxing.,Feng Qi.,Liu Wei.,Wang Tingting.,Cheng Aifang.,...&Jia Bing.(2014).Study on the contribution of cryosphere to runoff in the cold alpine basin: A case study of Hulugou River Basin in the Qilian Mountains.GLOBAL AND PLANETARY CHANGE,122.
MLA	Li Zongxing,et al."Study on the contribution of cryosphere to runoff in the cold alpine basin: A case study of Hulugou River Basin in the Qilian Mountains".GLOBAL AND PLANETARY CHANGE 122(2014).