A synthesis of hydrochemistry with an integrated conceptual model for groundwater in the Hexi Corridor, northwestern China

doi:10.1016/j.jseaes.2017.04.023

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院页岩气与地质工程重点实验室

	A synthesis of hydrochemistry with an integrated conceptual model for groundwater in the Hexi Corridor, northwestern China
	Wang, Liheng 1; Dong, Yanhui 1,2; Xu, Zhifang 1
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2017-09-15
卷号	146 页码:20-29
关键词	Groundwater Stable Isotopes Recharge Sources Hydrogeochemical Evolution Northwestern China
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2017.04.023
文献子类	Review
英文摘要	Although many studies have investigated the recharge and evolution of groundwater in the Hexi Corridor, northwestern (NW) China, they describe individual sites such as Jinchang, Jiuquan, Dunhuang, and others. Considering the similarity of these sites, a systematic review of the entire Hexi Corridor is lacking. This paper compares and summarizes previous studies in the Hexi Corridor to provide a regional perspective of the isotopic characteristics and hydrochemical composition of groundwater. In unconfined aquifers, groundwater is recharged by snow and ice melt water from the Qilian Mountains; local precipitation can be neglected. Therefore, the groundwater belongs to a unique hydrological cycle model in the Hexi Corridor, referred to as snow and ice melt water-groundwater system. The dominant anion species changes from HCO3- in front of the mountains to SO42- in the middle basin and Cl- at the basin boundary along the groundwater flow direction, and TDS increases gradually owing to evaporation. A major hydrogeochemical process is the dissolution of minerals from the aquifer in the recharge area changing to cation exchange reactions in the discharge area. Confined groundwater was recharged mainly in the late Pleistocene and middle Holocene at colder temperatures than those of modern times; thus, it is non-renewable. In addition to dissolution, the hydrochemical composition of confined groundwater is also affected by cation exchange reactions. The hydrogeochemical categories of the confined groundwater are simple and stable. In the present study, a conceptual model is established on the basis of the analyses presented, which has important implications for water resource management in the Hexi Corridor. The inter-basin water allocation program should continue in order to achieve optimal utilization of water resources, but groundwater exploitation should be limited as much as possible. Additionally, on the basis of the review and integration of previous research, the regional groundwater cycle patterns in the Hexi Corridor are illustrated in the present study, and new research questions are identified for future work.
WOS关键词	HEIHE RIVER-BASIN ; HYDROGEOCHEMICAL EVOLUTION ; DUNHUANG BASIN ; MINQIN BASIN ; RECHARGE ; AQUIFER ; WATER ; ISOTOPE ; RESOURCES ; AUSTRALIA
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000414820300002
资助机构	China Postdoctoral Science Foundation(2016 M591247) ; Youth Innovation Promotion Association Chinese Academy Sciences(2016063) ; China Postdoctoral Science Foundation(2016 M591247) ; Youth Innovation Promotion Association Chinese Academy Sciences(2016063) ; China Postdoctoral Science Foundation(2016 M591247) ; Youth Innovation Promotion Association Chinese Academy Sciences(2016063) ; China Postdoctoral Science Foundation(2016 M591247) ; Youth Innovation Promotion Association Chinese Academy Sciences(2016063)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62431]
专题	地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者	Dong, Yanhui
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, POB 9825, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Liheng,Dong, Yanhui,Xu, Zhifang. A synthesis of hydrochemistry with an integrated conceptual model for groundwater in the Hexi Corridor, northwestern China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2017,146:20-29.
APA	Wang, Liheng,Dong, Yanhui,&Xu, Zhifang.(2017).A synthesis of hydrochemistry with an integrated conceptual model for groundwater in the Hexi Corridor, northwestern China.JOURNAL OF ASIAN EARTH SCIENCES,146,20-29.
MLA	Wang, Liheng,et al."A synthesis of hydrochemistry with an integrated conceptual model for groundwater in the Hexi Corridor, northwestern China".JOURNAL OF ASIAN EARTH SCIENCES 146(2017):20-29.