Spatiotemporal variations of hydrochemistry and its controlling factors in the Yarlung Tsangpo River
LIU Jia-ju1, ZHAO Yu-shun2, HUANG Xiang3, GUO Huai-cheng1
1. College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China;
2. College of Environmental Sciences and Engineering, Tianjin University, Tianjin 300072, China;
3. Department of Chemistry and Environmental Science, Tibet University, Lhasa 850000, China
In order to study the characteristics of the water chemistry of the Yarlung Tsangpo River and its control factors, 212 water samples from the mainstream of the Yarlung Tsangpo River and its tributaries were collected in the three water periods in 2016. The mathematical statistics, Piper three-line map, Gibbs model, and ion ratio were analyzed. The hydrochemical characteristics of rivers in the whole basin, and the evolution of water chemistry in the basin. The results showed that the cations in the river water were dominated by Ca2+, Na+, and Mg2+; the anions were dominated by HCO3- and SO42-; the average value of TDS was 204.51mg/L, the degree of salinity is relatively low; the type of water chemistry is dominated by HCO3·SO4 (SO4·HCO3)-Ca·Mg (Mg·Ca) type water; The main ion concentration changes in the main stream of Yarlung Tsangpo fluctuated, and the seasonal changes were significant. Spatially, most ions in the river follow the trend of increasing first and then decreasing. The chemical samples of water are distributed in the middle left part of the Gibbs model, indicating that the chemical composition of the watershed in the basin is controlled by rock weathering. Principal component analysis and related analysis show that the Yarlung Tsangpo River Basin The chemical composition of water is controlled by human influence, and weathering of calcite, dolomite and dissolution of sulfuric acid also play a very important role. The vast majority of heavy metals in the three watersheds of the basin meet the requirements of Class I water bodies in surface waters.
Li F, Zhang Y, Xu Z, et al. The impact of climate change on runoff in the southeastern Tibetan Plateau[J]. Journal of Hydrology, 2013, 505(505):188-201.
[2]
Cullaj A, Hasko A, Miho A, et al. The quality of Albanian natural waters and the human impact[J]. Environment International, 2005, 31(1):133-152.
[3]
乐嘉祥,王德春.中国河流水化学特征[J]. 地理学报, 1963,(1):3-15.
[4]
Wang S L, Jin H J, Li S X, et al. Permafrost degradation on the Qinghai-Tibet Plateau and its environmental impacts.[J]. Permafrost & Periglacial Processes, 2000,11(1):43-53.
[5]
Wu W, Xu S, Yang J, et al. Silicate weathering and CO2, consumption deduced from the seven Chinese rivers originating in the Qinghai-Tibet Plateau[J]. Chemical Geology, 2008,249(3):307-320.
[6]
Adachi K, Tainosho Y. Characterization of heavy metal particles embedded in tire dust.[J]. Environment International, 2004,30(8):1009.
X. Huang †, Sillanpää M, Gjessing E T, et al. Water quality in the southern Tibetan Plateau:chemical evaluation of the Yarlung Tsangpo (Brahmaputra)[J]. River Research & Applications, 2011,27(1):113-121.
[10]
Yao T, Thompson L, Yang W, et al. Different glacier status with atmospheric circulations in Tibetan Plateau and surroundings[J]. Nature Climate Change, 2012,2(9):663-667.
[11]
Huang X, Sillanpää M, Gjessing E T, et al. Water quality in the Tibetan Plateau:major ions and trace elements in the headwaters of four major Asian rivers[J]. Science of the Total Environment, 2009,407(24):6242
[12]
Jiang L, Yao Z, Wang R, et al. Hydrochemistry of the middle and upper reaches of the Yarlung Tsangpo River system:weathering processes and CO2 consumption[J]. Environmental Earth Sciences, 2015,74(3):2369-2379.
[13]
Huang Xiang, Sillanpää, M, Gjessing, E. T, et al. Environmental impact of mining activities on the surface water quality in Tibet:Gyama valley[J]. Science of the Total Environment, 2010,408(19):4177-4184.
[14]
Pant R R, Zhang F, Rehman F U, et al. Spatiotemporal variations of hydrogeochemistry and its controlling factors in the Gandaki River Basin, Central Himalaya Nepal[J]. Science of the Total Environment, 2017,622-623:770.
[15]
Gaillardet J, Dupré B, Louvat P, et al. Global silicate weathering and CO2, consumption rates deduced from the chemistry of large rivers[J]. Chemical Geology, 1999,159(1-4):3-30.
[16]
Sarin M M, Krishnaswami S, Dilli K, et al. Major ion chemistry of the Ganga-Brahmaputra river system:Weathering processes and fluxes to the Bay of Bengal[J]. Geochimica Et Cosmochimica Acta, 1989,53(5):997-1009.
[17]
Ahmad T, Khanna P P, Chakrapani G J, et al. Geochemical characteristics of water and sediment of the Indus river, Trans-Himalaya, India:constraints on weathering and erosion[J]. Journal of Asian Earth Sciences, 1998,16(2/3):333-346.
[18]
Thomas J, Joseph S, Thrivikramji K P, et al. Seasonal variation in major ion chemistry of a tropical mountain river, the southern Western Ghats, Kerala, India[J]. Environmental Earth Sciences, 2014,71(5):2333-2351.
[19]
Dekov V M, Komy Z, Araújo F, et al. Chemical composition of sediments, suspended matter, river water and ground water of the Nile (Aswan-Sohag traverse).[J]. Science of the Total Environment, 1997,201(3):195.
[20]
Jiang L, Yao Z, Wang R, et al. Hydrochemistry of the middle and upper reaches of the Yarlung Tsangpo River system:weathering processes and CO2 consumption[J]. Environmental Earth Sciences, 2015,74(3):2369-2379.
[21]
Gibbs R J. Mechanisms Controlling World Water Chemistry[J]. Science, 1971,172(3985):870-2.
Diamantini E, Lutz S R, Mallucci S, et al. Driver detection of water quality trends in three large European river basins[J]. Science of the Total Environment, 2018,612:49-62.
[26]
Zayed J, Guessous A, Lambert J, et al. Estimation of annual Mn emissions from MMT source in the Canadian environment and the Mn pollution index in each province[J]. Science of the Total Environment, 2003,312(1-3):147.
[27]
Jiang L, Yao Z, Wang R, et al. Hydrochemistry of the middle and upper reaches of the Yarlung Tsangpo River system:weathering processes and CO2 consumption[J]. Environmental Earth Sciences, 2015,74(3):2369-2379.