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	Identification of key factors governing chemistry in groundwater near the water course recharged by reclaimed water at Miyun County, Northern China
	Ma Y.; Liang J.; Ma Y.; Ma Y.
	2013
关键词	reclaimed water groundwater chemistry multivariate analysis Chaobai River water-rock interaction evaporation crystallization cation exchange denitrification hydrogeochemical processes hierarchical cluster statistical-methods area quality basin denitrification attenuation district exchange
英文摘要	Reclaimed water was successfully used to recover the dry Chaobai River in Northern China, but groundwater may be polluted. To ensure groundwater protection, it is therefore critical to identify the governing factors of groundwater chemistry. Samples of reclaimed water, river and groundwater were collected monthly at Chaobai River from January to September in 2010. Fifteen water parameters were analyzed. Two kinds of reclaimed water were different in type (Na-Ca-Mg-Cl-HCO3 or Na-Ca-Cl-HCO3) and concentration of nitrogen. The ionic concentration and type in river were similar to reclaimed water. Some shallow wells near the river bed had the same type (Na-Ca-Mg-Cl-HCO3) and high concentration as reclaimed water, but others were consistent with the deep wells (Ca-Mg-HCO3). Using cluster analysis, the 9 months were divided into two periods (dry and wet seasons), and all samples were grouped into several spatial clusters, indicating different controlling mechanisms. Principal component analysis and conventional ionic plots showed that calcium, magnesium and bicarbonate were controlled by water-rock interaction in all deep and some shallow wells. This included the dissolution of calcite and carbonate weathering. Sodium, potassium, chloride and sulfate in river and some shallow wells recharged by river were governed by evaporation crystallization and mixing of reclaimed water. But groundwater chemistry was not controlled by precipitation. During the infiltration of reclaimed water, cation exchange took place between (sodium, potassium) and (calcium, magnesium). Nitrification and denitrification both happened in most shallow groundwater, but only denitrification in deep groundwater.
出处	Journal of Environmental Sciences-China
卷	25
期	9
页	1754-1763
收录类别	SCI
语种	英语
ISSN号	1001-0742
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30077]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Ma Y.,Liang J.,Ma Y.,et al. Identification of key factors governing chemistry in groundwater near the water course recharged by reclaimed water at Miyun County, Northern China. 2013.

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