The Chagan Lake Catchment is located in the midwest of Songnen Plain, which is a typical high fluoride groundwater area. High fluoride water has an important impact on the economic development and ecosystem stability of Chagan Lake. In this study, the spatial distribution characteristics and influencing factors of fluorine in Chagan Lake Catchment are discussed by using hydrochemistry and mathematical statistical analysis. The groundwater in the study area was characterized as Na⁺-rich and Ca²⁺-poor, with a high pH value and high HCO₃^– content. The average concentration of F^– was 3.02 mg/L, which was the highest in Qian’an County. The dissolution of fluorine-containing minerals and the desorption of F^– in soil provided the source of F^– in groundwater, while calcite and dolomite precipitation, cation exchange, and evaporation concentration provided favorable conditions for F^– dissolving, migration, and enrichment in water. In addition, the concentration of F^– in surface water was 4.56 mg/L, and the highest concentration was found in Hongzi Pool and Hua’ao Pool. The elevated concentrations of F^– in both surface water and groundwater in the study were affected by human factors, such as rice planting and water conservancy project construction.

中文翻译：

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东北查干湖流域氟的环境因素研究

查干湖集水区位于松嫩平原的中西部，该地区是典型的高氟化物地下水区域。高氟水对查干湖的经济发展和生态系统稳定性具有重要影响。本文通过水化学和数理统计分析，探讨了查干湖流域的氟空间分布特征及其影响因素。在研究区域中的地下水被表征为钠⁺富和Ca ²⁺国定贫困，具有高pH值和高HCO ₃ ^-含量。F ^–的平均浓度为3.02 mg / L，是迁安县最高的。含氟矿物的溶解和F ^–的解吸在土壤提供F的源^-在地下水，而方解石和白云石沉淀，阳离子交换，并蒸发浓缩，与F有利的条件^-在水中溶解，迁移和富集。此外，F的浓度^-在地表水为4.56毫克/升，而最高浓度在Hongzi池和华澳池被发现。F的浓度升高^-在地表水和地下水的研究中人为因素的影响，如水稻种植和水利工程建设的影响。