【摘要】 该文利用关中盆地2021年采集和收集的100套潜水水质样品数据，采用主成分分析、Gibbs图、Phreeqc软件、PCA-APCS-MLR、离子相关分析等方法，进行了关中盆地潜水水化学组分形成机制研究。研究结果显示：关中盆地渭河南北两岸潜水主要阴阳离子均来源于盐岩、石膏、白云石等矿物溶解。水化学作用以岩石风化、阳离子交替吸附、蒸发浓缩作用为主。潜水阳离子交换作用使地下水中Na⁺含量增大，而Ca²⁺含量减小。利用PCA对研究区地下水物质来源解析表明，水岩作用与蒸发浓缩作用与TDS、Na⁺、Cl^-、SO■等离子相关性强；酸碱度影响与Ca²⁺、NO₃-N、F^-、As等离子相关性强；原生地质环境和水岩作用与K⁺、Fe等离子相关性强；人类活动与自然因素与Mn、Cr⁶⁺等离子相关性强。更多还原

【Abstract】 Based on the 100 samples of phreatic water in Guanzhong Basin in 2021, methods including principal component analysis, Gibbs model, Phreeqc software, PCA-APCS-MLR, ionic correlation analysis have been used to study the formation mechanism of phreatic water chemical components in the Guanzhong Basin. The results show that the main anions and cations in phreatic water on both sides of the Wei River are all originating from mineral dissolution such as salt rock, gypsum, and dolomite. The hydrochemical effect process mainly are rock weathering, alternating cation adsorption, and evaporation concentration. The cation exchange process increases the Na⁺ contents and decreases the Ca²⁺ contents in phreatic water. Using PCA to analyze the sources of groundwater materials in the study area shows that water-rock interaction and evaporation concentration having strong correlation with TDS、Na⁺、Cl^-、SO■ ions. The pH value effect have a strong correlation with Ca²⁺, NO^-₃-N, F^- and As ions. The primary geological environment and water-rock interaction are strongly correlated with K⁺ and Fe ions. Human activities and natural factors are strongly correlated with Mn and Cr⁶⁺ions.更多还原