气候变化领域集成服务门户(CCPortal): Environmental isotopic and hydrochemical study of groundwater in the Ejina Basin, northwest China

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DOI	10.1007/s00254-008-1534-3
	Environmental isotopic and hydrochemical study of groundwater in the Ejina Basin, northwest China
	Su, Y. H.; Zhu, G. F.; Feng, Q.; Li, Z. Z.; Zhang, F. P.
发表日期	2009
ISSN	0943-0105
起始页码	601
结束页码	614
卷号	58 期号:3
英文摘要	The study investigates the groundwater evolution and its residence time in the Ejina Basin, northwest China according to isotope and hydrochemical analyses results. The groundwater chemistry is mainly controlled by the dissolution of halite, Glauber's salt, gypsum, dolomite and calcite, also influenced by other processes such as evaporation, ion exchange, and deposition. Based on tritium content in atmospheric precipitation and by adopting a model with exponential time distribution function, the mean residence time of the unconfined aquifer groundwater with fairly high tritium activities (21-49 TU) is evaluated. The results show that these groundwaters have low residence time (5-120 years) and are renewable. In contrast, the deep confined groundwaters are tritium-free and radiocarbon values range from 18.3 to 26.7 pmc. According to the most commonly used C-14 correction models, the radiocarbon groundwater ages were calculated which yield ages of approximately 4,087-9,364 years BP. Isotopic signatures indicate formation of deep confined groundwaters in a colder and wetter climate during the late Pleistocene and Holocene. It is suggested that long-term, rational water usage guide should be set up for the Heihe River Basin as a whole to permit a considerable discharge to the Ejina Basin.
英文关键词	Ejina Basin; Environmental isotope; Hydrochemistry; Arid regions; Groundwater age
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS关键词	WATER CHEMISTRY ; RIVER-BASIN ; MECHANISMS ; EVOLUTION ; RECHARGE
WOS记录号	WOS:000267895600015
来源期刊	ENVIRONMENTAL GEOLOGY
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/239388
作者单位	[Su, Y. H.; Feng, Q.] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China; [Zhu, G. F.] Lanzhou Jiaotong Univ, Sch Math Phys & Software Engn, Lanzhou 730000, Peoples R China; [Li, Z. Z.] Lanzhou Univ, Inst Bioinformat, Sch Math & Stat, Lanzhou 730000, Peoples R China; [Zhang, F. P.] Henan Univ, Sch Math & Informat Sci, Kaifeng 475001, Peoples R China
推荐引用方式 GB/T 7714	Su, Y. H.,Zhu, G. F.,Feng, Q.,et al. Environmental isotopic and hydrochemical study of groundwater in the Ejina Basin, northwest China[J]. 中国科学院西北生态环境资源研究院,2009,58(3).
APA	Su, Y. H.,Zhu, G. F.,Feng, Q.,Li, Z. Z.,&Zhang, F. P..(2009).Environmental isotopic and hydrochemical study of groundwater in the Ejina Basin, northwest China.ENVIRONMENTAL GEOLOGY,58(3).
MLA	Su, Y. H.,et al."Environmental isotopic and hydrochemical study of groundwater in the Ejina Basin, northwest China".ENVIRONMENTAL GEOLOGY 58.3(2009).