|Table of Contents|

Hydrochemical Characteristics and Sources of Small Bayin River Watershed in the Northeast of Qaidam Basin, China(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2023年第03期
Page:
749-759
Research Field:
水资源与水文地质
Publishing date:

Info

Title:
Hydrochemical Characteristics and Sources of Small Bayin River Watershed in the Northeast of Qaidam Basin, China
Author(s):
LI Dong-li1;  HE Hai-bo2; 3;  ZHANG Xue-cheng1;  GUAN Tian-hao1;  YANG Meng-di1;  DAI Wen-jing1;  SHAO Hang1;  DING Shi-yuan1;  LI Xiao-dong1*
(1. School of Earth System Science, Tianjin University, Tianjin 300072, China; 2. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, Guizhou, China; 3. Yunnan Key Laboratory of Earth System Science, Yunnan University, Kunming 650500, Yunnan, China)
Keywords:
hydrochemistry;  ion composition;  source;  spatial distribution;  controlling factor;  Qaidam Basin;  Qinghai-Tibet Plateau
PACS:
P592; X143
DOI:
10.19814/j.jese.2022.12047
Abstract:
Hydrochemistry characteristics, which are indicators of the regional climate and environment, can reveal recharge mode and material sources of lakes and rivers in the basin. To investigate the hydrochemical characteristics and the sources of major ions of the small Bayin river watersheds in the northeast of Qaidam Basin, Qinghai-Tibet Plateau, the water samples from Bayin river, Hurleg lake, and Tosen lake were collected during May 2021. The results show that pH, EC, and TDS increase along the flow direction; according to the Sukalev classification, the hydrochemical types of Bayin river, Hurleg lake, and Tosen lake are HCO3-Cl-Na-Ca-Mg/HCO3-Cl-Na-Mg, HCO3-Cl-Na-Mg, and SO4-Cl-Na-Mg, respectively; as a typical closed inland brackish lake, water chemistry of Tosen lake is primarily dominated by evaporation-crystallization processes; while Bayin river and Hurleg lake are jointly influenced by weathering, evaporation-crystallization processes, and sodium salt leaching; owing to the enhanced evaporation, carbonate minerals are always the first phase to precipitate, resulting in the decrease of Ca2+ mass concentration along the flow direction; the Mg2+/Ca2+ molar concentration ratios of Bayin river and Hurleg lake are low, indicating that aragonite or calcite is probably formed; while the Mg2+/Ca2+ molar concentration ratio of Tosen lake is high, indicating that high magnesium calcite or protodolomite might be formed; the main sources of Na+, K+ and Cl- in the water body are the evaporate dissolution such as halite(NaCl)and potash(KCl); moreover, Mg2+ and SO2-4 are mainly derived from the evaporate(MgSO4)weathering; HCO-3 with high mass concentration and Ca2+ may result from rapid dissolution of carbonate minerals, which is also one of the sources of Mg2+.

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Last Update: 2023-05-30