Composition, spatial distribution, and environmental significance of water ions in Pumayum Co catchment, southern Tibet

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	Composition, spatial distribution, and environmental significance of water ions in Pumayum Co catchment, southern Tibet
	Wang Y.; Lin X.
	2010
关键词	Lake Pumayum Co hydrochemistry spatial distribution sedimentary process carbonate weathering processes solute acquisition garhwal himalaya chemistry india river geochemistry fluxes lake
英文摘要	The chemistry of major cations (Mg(2+), Ca(2+), Na(+), and K(+)) and anions (HCO(3)(-), SO(4)(2-), and Cl(-)) in the water of Lake Pumayum Co and its inflow river was studied, revealing the obvious ionic difference among various inflow rivers and the lake. The chemical type of the lake water was Mg(2+)-Ca(2+)-HCO(3)(-)-SO(4)(2+), but the major ions of the main inflow rivers were Ca(2+)-Mg(2+)-HCO(3)(-). In the lake inlet of Jiaqu River, the main inflow river, there was significant variance of water chemistry within the depth less than 2 m. However, it was almost homogeneous at other area of the lake. Therefore, with the evidence of distribution of water chemistry and oxygen isotope of lake water, a conclusion can be outlined that Jiaqu River had a distinct effect on the hydrochemistry of the water on the submerged delta, whereas this is not the case for other rivers. The Gibbs plot revealed that the dominant mechanism responsible for controlling chemical compositions of the lake water was rocks weathering in the drainage area. Ion ratios and ternary plots further explored the main processes controlling the water chemistry of the catchment, i.e., carbonate weathering, pyrite weathering, and silicate weathering. The different hydrochemistry characteristics between river water and lake water may result from the CaCO(3) precipitation. The findings will benefit the explanation of the environmental significance of carbonate in paleolimnological studies in the lake.
出处	Journal of Geographical Sciences
卷	20
期	1
页	109-120
收录类别	SCI
语种	英语
ISSN号	1009-637X
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/22210]
专题	地理科学与资源研究所_历年回溯文献地理科学与资源研究所_区域可持续发展分析与模拟重点实验室_区域可持续发展模拟实验室
推荐引用方式 GB/T 7714	Wang Y.,Lin X.. Composition, spatial distribution, and environmental significance of water ions in Pumayum Co catchment, southern Tibet. 2010.