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| 长治市浊漳河流域地下水化学特征及成因分析 |
| Hydrochemical Characteristics and Genesis Analysis of Groundwater in the Zhuozhang River Basin within Changzhi |
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| DOI： |
| 中文关键词: 水化学特征 成因分析 地下水 浊漳河流域 长治市 |
| 英文关键词: Hydrochemical characteristics Genesis analysis Groundwater Zhuozhang River basin Changzhi |
| 基金项目:国家重点研发计划基金资助项目（2021YFB3901300）；山西电子科技学院人才引进科研启动经费基金资助项目（2023RKJ026）；山西省科技创新计划“汾河流域生态服务空间转移对区域发展的影响机理研究”基金资助项目（2022L634） |
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| 中文摘要: |
| 通过Piper三线图、Gibbs模型、离子比值及矿物饱和指数等方法，对长治市浊漳河流域丰水期和枯水期74个地下水样品的化学特征及其成因进行分析。结果表明：研究区地下水以淡水为主，略偏碱性，丰水期和枯水期存在显著差异，主要阳离子丰度从高至低依次为Ca2+＞Na+＞Mg2+＞K+（丰水期）及Na+＞Ca2+＞Mg2+＞K+（枯水期），枯水期地下水的矿化度和污染风险更高；地下水化学类型以HCO3-Ca型为主，阴离子分布呈现显著季节性迁移；地下水化学成分主要受水岩相互作用（如碳酸盐岩和硅酸盐岩的风化溶解）、蒸发浓缩和人类活动（如农业施肥、工矿排放）的影响；方解石、白云石、石膏和岩盐在地下水中处于未饱和状态，且枯水期矿物更接近饱和；阳离子交换作用显著，且人类活动对地下水的影响在枯水期更为突出。 |
| 英文摘要: |
| The hydrochemical characteristics and their controlling factors of 74 groundwater samples collected from the Zhuozhang River basin in Changzhi during the wet and dry seasons were investigated using Piper trilinear diagrams， Gibbs models， ionic ratios， and mineral saturation indices. The results indicated that the groundwater in the study area was predominantly freshwater and slightly alkaline， exhibiting significant seasonal differences. The major cations decreased in abundance in the order of Ca2+＞Na+＞Mg2+＞K+ during the wet season， and Na+＞Ca2+＞Mg2+＞K+ during the dry season. Groundwater during the dry season showed higher mineralization and greater pollution risk. The hydrochemical type was dominated by HCO3 Ca， with significant seasonal shifts in anion distribution. The chemical composition of groundwater was primarily governed by water rock interactions〖JP2〗（including the weathering and 〖GK!87mm〗dissolution of carbonate and silicate rocks）， evaporation and concentration， and anthropogenic activities（such as agricultural fertilization and discharges from industrial and mining activities）. Calcite， dolomite， gypsum， and halite remained undersaturated in the groundwater but were closer to saturation during the dry season. Cation exchange was significant， and the influence of human activities on groundwater was more pronounced during the dry season. |
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