Identification of key factors governing chemistry in groundwater near the water course recharged by reclaimed water at Miyun County, Northern China

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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
	Bu Hongmei; Han Dongmei; Zhang Yinghua; Song Xianfang; Ma Ying
	2013
关键词	River pollution Calcium Chlorine compounds Cluster analysis Denitrification Evaporation Groundwater Groundwater pollution Hydrochemistry Magnesium Positive ions Precipitation (chemical) Principal component analysis Reclamation Rivers Sodium sulfate Weathering
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. 2013 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.
出处	Journal of Environmental Sciences (China)
卷	25 期:9 页:1754-1763
收录类别	EI
语种	英语
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/31217]
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	Bu Hongmei,Han Dongmei,Zhang Yinghua,et al. Identification of key factors governing chemistry in groundwater near the water course recharged by reclaimed water at Miyun County, Northern China. 2013.