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DOI	10.1007/s12665-015-4811-y
	Major ions and trace elements of two selected rivers near Everest region, southern Himalayas, Nepal
	Paudyal, Rukumesh; Kang, Shichang; Sharma, Chhatra Mani; Tripathee, Lekhendra; Huang, Jie; Rupakheti, Dipesh; Sillanpaeae, Mika
发表日期	2016
ISSN	1866-6280
EISSN	1866-6299
卷号	75 期号:1
英文摘要	During pre-monsoon of 2013, water samples were collected from 30 sites of two major rivers, viz. Dudh Koshi and Indrawati to assess the river water quality on the southern side of the Nepalese Himalayas. The physical parameters such as pH, EC, turbidity and water temperature were measured in the field and major ions (Na+, NH4+, K+, Ca-2(+), Mg-2(+), Cl-, SO42-, and NO3-) and element concentrations (Li, Sc, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, As, Rb, Sr, Cs, Ba, Pb, U, Y, Zr, Nb and Cd) in the water samples were analyzed in the laboratory. The result indicated river waters were neutral to mostly alkaline with pH ranging from 6.57 to 8.81 and EC ranging from 10.5 to 321 mu S/cm. The lower values of turbidity were recorded in the pristine tributaries of Dudh Koshi, whereas the main rivers had the higher values with a range of 0.51-515 NTU. Bicarbonate (HCO3-) showed a significant correlation with Ca2+ and Mg2+, suggesting carbonate weathering as the dominant geochemical process in the region. Furthermore, the Gibbs plot also suggested the dominance of rock weathering. Very low concentration of trace elements was found in most of the samples which were within the WHO guidelines. In addition, the concentrations of toxic elements such as As and Pb were below the detectable limits in most of the samples. Furthermore, the analysis of PCA suggests that most of the elements originated from natural weathering; however, there were some evidences of anthropogenic effect on water quality which may not be critical issue at present but can be of concern in future.
关键词	Dudh Koshi Indrawati Trace elements Major ions Nepal
学科领域	Environmental Sciences & Ecology; Geology; Water Resources
语种	英语
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	ENVIRONMENTAL EARTH SCIENCES
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/111861
作者单位	Chinese Acad Sci, CAREERI, State Key Lab Cryospher Sci, Donggang West Rd 320, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Paudyal, Rukumesh,Kang, Shichang,Sharma, Chhatra Mani,et al. Major ions and trace elements of two selected rivers near Everest region, southern Himalayas, Nepal[J]. 中国科学院西北生态环境资源研究院,2016,75(1).
APA	Paudyal, Rukumesh.,Kang, Shichang.,Sharma, Chhatra Mani.,Tripathee, Lekhendra.,Huang, Jie.,...&Sillanpaeae, Mika.(2016).Major ions and trace elements of two selected rivers near Everest region, southern Himalayas, Nepal.ENVIRONMENTAL EARTH SCIENCES,75(1).
MLA	Paudyal, Rukumesh,et al."Major ions and trace elements of two selected rivers near Everest region, southern Himalayas, Nepal".ENVIRONMENTAL EARTH SCIENCES 75.1(2016).