Arid Zone Research ›› 2022, Vol. 39 ›› Issue (3): 829-840.doi: 10.13866/j.azr.2022.03.16

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An assessment of groundwater, surface water, and hydrochemical characteristics in the upper valley of the Bortala River

DING Qizhen1,2,3(),LEI Mi1,2,3(),ZHOU Jinlong1,2,3(),ZHANG Jie4,XU Dongsheng5   

  1. 1. College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China
    2. Xinjiang Hydrology and Water Resources Engineering Research Center, Urumqi 830052, Xinjiang, China
    3. Xinjiang Key Laboratory of Hydraulic Engineering Safety and Water Disaster Prevention, Urumqi 830052, Xinjiang, China
    4. School of Geography and Planning, Nanning Normal University, Nanning 530100, Guangxi, China
    5. Zhongshui North Engineering Design & Research Co. Ltd., Tianjin 300222, China
  • Received:2021-09-30 Revised:2021-11-17 Online:2022-05-15 Published:2022-05-30
  • Contact: Mi LEI,Jinlong ZHOU E-mail:1650655141@qq.com;zjzhoujl@163.com

Abstract:

This paper examined the hydrochemical characteristics and water quality status of groundwater and surface water in the upper valley of the Bortala River, Xinjiang. The examination was based on 36 groups of water sample data. Hydrochemical characteristics and their influencing factors were studied by Piper diagram, correlation analyses, Gibbs diagram and ion ratio, and the entropy-Bayesian water quality evaluation model, Wilcox and USSL diagrams were used to evaluate water quality. Results of hydrochemical analyses showed the following: (1) the mechanical well water, spring water, and river water in the study area were weakly alkaline fresh water, and total hardness (TH), F-, N O 3 - and total dissolved solids were aligned as mechanical well water > spring water > river water, whereas H C O 3 - and Ca2+ were the dominant anions and cations, respectively. Contents of each component in the upper Bortala River increased along the river. (2) The main hydrochemical types of mechanical well water and spring water in the area were the HCO3-Ca type, and main hydrochemical types of river water were the HCO3-Ca and HCO3·SO4-Ca·Na types. Hydrochemical characteristics were controlled mainly by rock weathering, and hydrochemical components were mainly from carbonate rock weathering. Evaporation rock dissolution also occurred and it was affected by cation exchange and human activities. The water quality evaluation of drinking water showed that 82.6% of mechanical well water and 100% of spring water were suitable for drinking, basically suitable for drinking, or suitable for drinking after proper treatment. Water sample points that were not suitable for drinking were affected mainly by excessive Fe, F-, and N O 3 -. River water, well water, and spring water were suitable for the evaluation of irrigation water quality.

Key words: hydrochemical characteristics, water quality assessment, entropy-Bayesian water quality model, upper valley of Bortala River, Xinjiang