巴楚县平原区地下水水化学特征及成因分析
Hydrochemical characteristics and cause analysis of groundwater in the plain area of Bachu County
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摘要: 以新疆维吾尔自治区喀什地区巴楚县平原区为研究区,对地下水进行系统取样分析.由描述统计分析结果可知,研究区地下水属于总溶解固体、总硬度偏高的中性-偏弱碱性水,地下水中阳离子以Na++K+为主,阴离子以SO42-为主.采用Piper三线图对2014年和2017年地下水水化学类型进行划分,结果表明,地下水水化学类型由SO4·Cl-Na·Ca型和SO4·Cl-Na型过渡到以SO4·Cl-Na·Ca型和SO4·Cl-Na·Ca·Mg型为主.通过Gibbs图解法、离子比值法和饱和指数法等对地下水水化学成因进行分析,结果表明,研究区地下水化学组分主要受蒸发-浓缩作用影响,部分受岩石风化作用影响,大气降水、阳离子交替吸附作用和人类活动对地下水化学组分形成影响较小.Abstract: A systematic sampling analysis of groundwater was carried out in the plain area of Bachu County in Kashgar Prefecture, Xinjiang. The descriptive statistical analysis results showed that the groundwater belonged to the neutral-slightly alkaline water with high total dissolved solids and high total hardness, the cations in groundwater were mainly Na++K+, while anions were mainly SO42-. The Piper diagram was used to classify groundwater hydrochemical types in 2014 and 2017. The results showed that groundwater hydrochemical types were transferred from SO4·Cl-Na·Ca type and SO4·Cl-Na type to SO4·Cl-Na·Ca type and SO4·Cl-Na·Ca·Mg type. Gibbs diagram method, iron ration analysis and saturation index method were used to analyze the causes of groundwater hydrochemistry, the results showed that the groundwater chemical compositions were mainly affected by evaporation-concentration, partly affected by rock weathering. While the atmospheric precipitation, cation exchange and adsorption, and human activities had little effect on the formation of groundwater chemical compositions.
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Key words:
- groundwater /
- hydrochemical characteristics /
- Bachu County /
- Kashgar Prefecture
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