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	Identification and evolution of groundwater chemistry in the Ejin Sub-Basin of the Heihe River, northwest China
	Su Yong-Hong; Feng Qi; Zhu Gao-Feng; Si Jian-Hua; Zhang Yan-Wu
刊名	PEDOSPHERE
	2007-06-01
卷号	17期号:3页码:331-342
关键词	Ejin Sub-Basin groundwater quality Heihe River human impact water resources development
ISSN号	1002-0160
通讯作者	Su Yong-Hong(syh@ns.lzb.ac.cn)
英文摘要	Hydro-chemical characteristics of groundwater and their changes as affected by human activities were studied in the Ejin Sub-Basin of the Inner Mongolia Autonomous Region, China, to understand the groundwater evolution, to identify the predominant geochemical processes taking place along the horizontal groundwater flow path, and to characterize anthropogenic factors affecting the groundwater environment based on previous data. The concentrations of major ions and total dissolved solids (TDS) in the groundwater showed a great variation, with 62.5% of the samples being brackish (TDS >= 1000 mg L-1). The groundwater system showed a gradual hydro-chemical zonation composed of Na+-HCO3-Na+-Mg2+-SO42-Cl- 4, and Na+-Cl-. The relationships among the dissolved species allowed identification of the origin of solutes and the processes that generated the observed water compositions. The dissolution of halite, dolomite, and 4, and Ca, but other processes, such as mixing, Na+ gypsum explained, in part, the presence of Na+, K+, Cl-, SO42- and Ca2+ exchange for Ca2+ and Mg2+, and calcite precipitation also contributed to the composition of water. Human activity, in particular large-scale water resources development associated with dramatic population growth in the last 50 years, has led to tremendous changes in the groundwater regime, which reflected in surface water runoff change, decline of groundwater table and degeneration of surface water and groundwater quality. Solving these largely anthropogenic problems requires concerted, massive and long-term efforts.
收录类别	SCI
WOS关键词	WATER ; BASIN ; AREAS
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000246824900007
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2555960
专题	寒区旱区环境与工程研究所
通讯作者	Su Yong-Hong
作者单位	1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 2.Lanzhou Univ, Sch Math & Stat, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Su Yong-Hong,Feng Qi,Zhu Gao-Feng,et al. Identification and evolution of groundwater chemistry in the Ejin Sub-Basin of the Heihe River, northwest China[J]. PEDOSPHERE,2007,17(3):331-342.
APA	Su Yong-Hong,Feng Qi,Zhu Gao-Feng,Si Jian-Hua,&Zhang Yan-Wu.(2007).Identification and evolution of groundwater chemistry in the Ejin Sub-Basin of the Heihe River, northwest China.PEDOSPHERE,17(3),331-342.
MLA	Su Yong-Hong,et al."Identification and evolution of groundwater chemistry in the Ejin Sub-Basin of the Heihe River, northwest China".PEDOSPHERE 17.3(2007):331-342.

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