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Hydrochemistry of waters in snowpacks, lakes and streams of Mt. Dagu, eastern of Tibet Plateau
Guang Zhao1,2; Wei Li1; Feng Li3; Fu Zhang3; Gangcai Liu1
Corresponding AuthorGangcai Liu
2018
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
EISSN1879-1026
Volume610Pages:641-650
SubtypeArticle
Abstract

There is little available information on hydrochemistry of waters from glacial source to downstream of glacierized catchments. Here we examine the water chemistry of the snowpacks, lakes and streams at eight sampling sites within glacial basin in Mt. Dagu, east Tibetan Plateau. An air mass trajectory model, correlation analysis, Gibbs model, Piper diagram and hydrograph separation analysis were utilized to investigate the characteristics and solutes sources of these waters. Generally, the TDS (Total dissolved solids; 7.54, 13.95 and 18.70 mg/L for snowpacks, lakes and streams respectively) and concentrations of main chemicals in all samples exhibited downstream trend from snowpacks to streams. Of the cations, Ca2+ appeared with the highest concentration followed by K+ and Na+. Of the anions, HCO3- was most abundant, followed by Cl-, SO42- and NO3-. For snowpack samples, the air masses arriving at the sampling sites were typically prevailing from the western Tibet Plateau, central Asia and the northern Mongolia plateau. The fine particulate matter in the Mt. Dagu snowpacks was most likely transported long range from three arid regions above-mentioned. High concentrations of SO42- and NH4+ in snowpacks, with twice as much NH4+ as SO42-, implying that the soluble part of the finer particles was transported as a form of ammonium sulfate. Rock weathering determined the ion components of the meltwater and the water could be classified as calcium and bicarbonate type based on the Piper diagram. The chemical contributions from glacier-snow meltwater were 20%-131% for lake and 5%-79% for stream, while the runoff contribution to lake varied from 65.4% to 84.9%, and 66.1% to 81.6% for stream. This study suggested that glacier-snow meltwater was the mainly runoff contributor to lake and stream water and that snowpack solutes derived from eolian additions exert a significant influence on lake and stream chemistry.

KeywordEnvironmental Significance Source Analysis Hydrogen And Oxygen Isotopes Hydrograph Separation
DOI10.1016/j.scitotenv.2017.08.088
Indexed BySCI
Language英语
Quartile2区
TOP
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/19149
Collection山地灾害与地表过程重点实验室
Affiliation1.Key Laboratory ofMountain Surface Processes and Ecological Regulation, Institute ofMountain Hazards and Environment, Chinese Academy of Sciences and Ministry ofWater Resources, Chengdu
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.Dagu Glacier Administration Bureau, Heishui County 623500, Sichuan Province, China
Recommended Citation
GB/T 7714
Guang Zhao,Wei Li,Feng Li,et al. Hydrochemistry of waters in snowpacks, lakes and streams of Mt. Dagu, eastern of Tibet Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,610:641-650.
APA Guang Zhao,Wei Li,Feng Li,Fu Zhang,&Gangcai Liu.(2018).Hydrochemistry of waters in snowpacks, lakes and streams of Mt. Dagu, eastern of Tibet Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,610,641-650.
MLA Guang Zhao,et al."Hydrochemistry of waters in snowpacks, lakes and streams of Mt. Dagu, eastern of Tibet Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 610(2018):641-650.
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