许疃地区浅层地下水水文地球化学特征

Hydrogeochemical Characteristics of Shallow Groundwater in Xutuan Area

摘要: 本研究以许疃地区浅层地下水为研究对象，通过对19组松散层水样的水化学特征进行分析，探讨了地下水化学成分的来源及其演化规律。研究采用离子比值分析、数理统计、Piper三线图和Gibbs图等方法，揭示了地下水的主要离子组成及其形成机制。结果表明，松散层水样品中阳离子以Na⁺ + K⁺为主，阴离子以${\text{HCO}}_3^{-}$ 为相对优势离子，水化学主要类型为${\text{HCO}}_3^{-}$ -Na + K型。基于离子比值分析，研究区松散层水水样主要来源于蒸发浓缩等水岩相互作用过程，同时伴有岩石风化作用和不同程度的离子交换。通过Gibbs图和离子比值分析，发现地下水化学成分主要受蒸发浓缩作用的影响，同时伴有岩石风化和离子交换作用。研究结果为许疃煤矿区地下水资源的可持续利用和环境保护提供了科学依据。

Abstract: Analysis of groundwater chemical characteristics is helpful to understand the composition of groundwater and its source, and can also provide important support for ensuring sustainable use of water resources, preventing water resources and protecting ecological environment. Coal mining will cause certain damage to groundwater environment. With 19 sets of water samples in Xutuan area as the research object, the ion ratio and mathematical statistics are used to analyze the main ion concentration of the unconsolidated layer water. The results show that the cation in the unconsolidated layer water sample is mainly Na⁺ + K⁺, and the anion is ${\text{HCO}}_3^{-}$ as the relative dominant ion. The main type of water chemistry is ${\text{HCO}}_3^{-}$ -Na + K type. Based on ion ratio analysis, the water samples of the unconsolidated layer in the study area are mainly derived from the water-rock interaction process, such as evaporation and concentration, accompanied by rock weathering and different degrees of ion exchange.