气候变化领域集成服务门户(CCPortal): Identification and evolution of groundwater chemistry in the Ejin Sub-Basin of the Heihe River, northwest China

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DOI	10.1016/S1002-0160(07)60040-X
	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
发表日期	2007
ISSN	1002-0160
EISSN	2210-5107
卷号	17 期号:3
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.
关键词	Ejin Sub-Basin groundwater quality Heihe River human impact water resources development
学科领域	Agriculture
语种	英语
WOS研究方向	Soil Science
来源期刊	PEDOSPHERE
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/111504
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]. 中国科学院西北生态环境资源研究院,2007,17(3).
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).
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).