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对盐池内流区浅层地下水进行取样分析测试,采用描述性统计、Pearson相关性分析、piper三线图、Gibbs图、离子比例系数图等方法对该区浅层地下水的水化学特征及其成因进行了分析研究。结果表明:1)研究区浅层地下水总体呈偏碱性,硬度极大,属于微咸水,并且F-含量普遍偏高。2)研究区浅层地下水常量组分为Na~+、SO_4~(2-)、Cl~-,其次是HCO_3~-、Mg~(2+)和Ca~(2+),水化学类型以Cl-Na型和SO)4-Na型为主。3)地下水化学组分来源于硅铝酸盐矿物,碳酸盐矿物,以及岩盐、石膏等蒸发岩的风化溶解。4)地下水水化学特征的形成与溶滤作用、阳离子交换作用、蒸发浓缩作用、混合作用等有关,并以蒸发浓缩作用为主。
The shallow groundwater in Yanchi internal flow area was sampled and analyzed. Descriptive statistics, Pearson correlation analysis, piper three-line diagram, Gibbs diagram and ion proportion coefficient map were used to analyze the hydrochemical characteristics and genesis of shallow groundwater in this area Analytical research. The results show that: 1) The shallow groundwater in the study area is generally alkaline and extremely hard, belonging to brackish water, and the F- content is generally high. 2) In the study area, the constant components of shallow groundwater are Na ~ +, SO_4 ~ (2-) and Cl ~ -, followed by HCO_3 ~ -, Mg ~ (2+) and Ca ~ Cl-Na and SO) 4-Na-based. 3) The groundwater chemical components are derived from the weathering dissolution of aluminosilicate minerals, carbonate minerals, and evaporites such as rock salt and gypsum. 4) The formation of groundwater hydrochemical features is related to leaching, cation exchange, evaporation and concentration, and mixing, and is mainly characterized by evaporation and concentration.