Abstract

Due to the impact of human agricultural production and climate and environmental changes, the suitability of groundwater for drinking purposes has attracted widespread attention. In order to quantify the hydrochemical characteristics of groundwater in Hailun and evaluate its suitability for drinking purposes, 55 groundwater samples were collected and analyzed. The results show that groundwater in aquifers in the study area is weakly alkaline. The content is in the order HCO₃^-> Cl^-> SO₄^2- for anions, and Ca²⁺> Na⁺> Mg²⁺ for cations. Groundwater chemical type were dominated by HCO₃-Ca• Mg, HCO₃-Ca• Na, HCO₃-Ca, and HCO₃ - Ca • Mg • Na. The Gibbs plot, PCA, and CAI-1 index show that ion exchange, rock weathering and evaporation crystallization are the main reasons affecting the water chemical composition in Hailun. The analysis of water samples based on the WQI model revealed that about 69.09%, 25.45%, 1.81%, and 3.63% of the water samples were excellent, good, very poor, and unsuitable for drinking purposes, respectively. The spatial distribution map of water quality index show that most of the groundwater resources in the study area are not polluted and therefore suitable for drinking.

抽象的

由于人类农业生产以及气候和环境变化的影响，地下水是否适合饮用目的已引起广泛关注。为了量化海伦市地下水的水化学特征并评估其适合饮用的目的，收集并分析了55个地下水样品。结果表明，研究区含水层中的地下水呈弱碱性。所述内容是在顺序HCO ₃ ^- >氯^- > SO ₄ ^2-为阴离子，和Ca ²⁺ >的Na ⁺ >镁²⁺为阳离子。地下水化学类型以HCO ₃ -Ca•Mg，HCO ₃ -Ca•Na，HCO为主₃ -Ca和HCO ₃ -Ca•Mg•Na。吉布斯图，PCA和CAI-1指数表明，离子交换，岩石风化和蒸发结晶是影响海伦市水化学成分的主要原因。基于WQI模型的水样本分析显示，分别有69.09％，25.45％，1.81％和3.63％的水样本分别为优，良，极差和不适合饮用。水质指数的空间分布图表明，研究区的大部分地下水资源未被污染，因此适合饮用。