河南省东部平原浅层地下水水质特征分析

Analysis of groundwater quality in the shallow aquifers of the east plain in Henan

依托国家地下水监测站点建设,采取91组浅层地下水进行水质检测,分析结果表明,河南省东部平原浅层地下水多数已不满足生活饮用标准,Ⅲ类以上水样占93.6%。硬度、TDS均值分别为486.33 mg/L、1184.5 mg/L,Mn、F^(-)、I^(-)超标率分别为73.63%、65.93%、34.07%,有机污染程度低。通过分析河南省东部平原浅层地下水化学成分特点,水化学类型和离子间相关性分析及演化规律,得出研究区水化学组成受水文地质条件、蒸发浓缩作用影响显著。最后探讨了研究区高氟、高碘浅层地下水的分布及形成原因,为区内劣质水的防治提供依据。

Relying on the construction of national groundwater monitoring sites,91 shallow groundwater samples were collected for water quality analysis.The result shows that 93.6%of water samples have not met the standards for drinking water quality in the East Plain in Henan.The mean value of hardness and TDS are 486.33 mg/L and 1184.5 mg/L.73.63%of Mn、65.93%of F^(-)and 34.07%of I^(-),exceed the standard respectively,the organic pollution is low.Based on the analysis of the characteristics of chemical composition of shallow groundwater in the eastern plain of Henan province,the correlation analysis and evolution rule of hydrochemical types and ions,it is concluded that the hydrochemical composition in the study area is significantly affected by hydrogeological conditions and evaporation and concentration.Finally,the distribution and formation reasons of the shallow groundwater with high fluorine and iodine content in the study area are discussed to provide a basis for the prevention and control of inferior water in the area.