干旱区研究

Arid Zone Research >

2022 , Vol. 39 >Issue 1: 155 - 164

DOI: https://doi.org/10.13866/j.azr.2022.01.16

Distribution characteristics and formation of fluorinein groundwater in Hotan Prefecture

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  • 1. College of Water Conservancy 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 Security and Water Disasters Prevention, Urumqi 830052, Xinjiang, China

Received date: 2021-03-30

  Revised date: 2021-06-04

  Online published: 2022-01-24

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Abstract

Hotan Prefecture is located in southwestern Xinjiang, and is characterized by a dry climate and sparse rainfall. Groundwater is an important source of drinking water in this area, therefore, determining the distribution of fluorine and the causes of the presence of this element in groundwater in the area is of great significance for human health. Based on the results of a group of 217 shallow groundwater quality tests conducted in Hotan Prefecture, Xinjiang, from 2002 to 2018, the spatial and temporal distribution characteristics and formation of fluoride in shallow groundwater were here studied using GIS software, mathematical statistics, Gibbs diagrams, hydrogeochemical simulations, and other methods. The results show that the variation range of fluorine in groundwater was 0.05-16.95 mg·L-1, with an average value of 1.38 mg·L-1, and the over-standard rate was as high as 36.1%. In terms of its spatial distribution, the high-fluorine groundwater was distributed sporadically within a small range, while vertically, the fluorine content decreased with the increase of well depth. With time, the groundwater fluorine content also showed an increasing trend, suggesting a specific relationship with the hydrochemical environment. High alkalinity and HCO-3 concentrations will increase the solubility of fluoride in groundwater. In addition to the primary hydrogeological conditions and hydrochemical environment, strong evaporation concentration, water-rock interactions, and cation exchange adsorption have some effects on the migration and enrichment of fluorine.

Key words： Hotan Prefecture; high-fluoride groundwater; cause analysis; hydrogeochemical model

Cite this article

SHI Wenwen,ZHOU Jinlong,ZENG Yanyan,SUN Ying . Distribution characteristics and formation of fluorinein groundwater in Hotan Prefecture[J]. Arid Zone Research, 2022 , 39(1) : 155 -164 . DOI: 10.13866/j.azr.2022.01.16

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