| 郯庐断裂带（安徽段）浅层地下水水化学特征、控制因素及水质评价 |
| 摘要点击 5428 全文点击 657 投稿时间：2023-05-16 修订日期：2023-07-17 |
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| 中文关键词 郯庐断裂带 地下水 水文地球化学特征 水岩作用 控制因素 水质评价 |
| 英文关键词 Tan-Lu fault zone groundwater zone hydrogeochemical characteristics water-rock interaction controlling factors water quality evaluation |
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| 中文摘要 |
| 为研究郯庐断裂带（安徽段）地下水的水化学特征、控制因素和地下水质量.在郯庐断裂带周边的江淮波状平原区、沿江丘陵平原区和皖西山地共采集了86组地下水,综合运用描述性统计、Piper图、Gibbs图、离子比例分析、饱和指数、氯碱指数和熵权水质指数（EWQI）等方法,开展了地下水的水化学特征及控制因素研究,评价了地下水的质量.结果表明,郯庐断裂带（安徽段）周边浅层地下水呈弱碱性,地下水化学类型以HCO3-Ca·Mg和HCO3-Na·Ca型为主.水岩相互作用控制地下水化学组分的形成,硅酸盐岩和碳酸盐岩风化作用控制了地下水化学组分的形成.强烈的阳离子交替吸附作用是引起Na+富集的重要因素.研究区地下水整体质量较好,但受到一定程度人类活动的污染,江淮波状平原和沿江丘陵平原大部分地下水不适合直接饮用.研究结果对郯庐断裂带（安徽段）周边浅层地下水资源可持续开发利用和环境保护具有重要意义. |
| 英文摘要 |
| To study the hydrochemical characteristics, controlling factors, and groundwater quality of the Tan-Lu fault zone (Anhui section), 86 groundwater samples were taken from the areas surrounding the Tan-Lu fault zone (Anhui section), which included the Jianghuai Wavy Plain, the Yanjiang Hill Plain, and the Dabie Mountains in western Anhui. Descriptive statistics, Piper diagram, Gibbs diagram, ion ratio analysis, saturation index, chloride-alkalinity index, and entropy weight water quality index (EWQI) were used to comprehensively study the hydrochemical characteristics and controlling factors of groundwater and to evaluate its quality. The results showed that the shallow groundwater in the Tan-Lu fault zone (Anhui section) was weakly alkaline, with dominant anions and cations of HCO3-, Ca2+ and Na+, respectively, and the hydrochemical types were mainly HCO3-Ca·Mg and HCO3-Na·Ca. The solute source of groundwater was mainly controlled by water-rock interactions, and the weathering of silicate and carbonate rocks jointly contributed to the formation of the chemical components of groundwater. Strong cation exchange adsorption was an important factor causing Na+ enrichment. The overall quality of groundwater in the study area was good but was polluted to a certain extent by human activities. Most of the groundwater in the Jianghuai Wavy Plain and Yanjiang Hill Plain was not suitable for direct drinking. The results of this research have important implications for the sustainable development and utilization of shallow groundwater resources and environmental protection in the Tan-Lu fault zone (Anhui section). |
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