宝鸡县幅地下水水化学特征与水质评价

Hydro-chemical characteristics and quality evaluation of groundwater in Baoji County

在宝鸡县幅1︰5万水文地质调查基础上,系统采集区内地下水水样,结合研究区水文地质条件,研究了区内地下水水化学特征,并对地下水质量做出评价。通过对水质结果进行统计分析,研究区潜水水化学类型可分为HCO_(3)-Ca、HCO_(3)-Ca·Mg、HCO_(3)-Ca·Mg·Na、HCO_(3)-Ca·Na和HCO_(3)-Na·Mg型水;研究区承压水水化学类型可分为HCO_(3)-Ca、HCO_(3)-Ca·Mg、HCO_(3)-Ca·Mg·Na、HCO_(3)-Ca·Na和HCO_(3)-Na·Ca·Mg型水。依据《地下水质量标准》(GB/T14848-2017)对研究区地下水进行分类评价,区内地下水以Ⅲ类水为主,少部分为Ⅱ类水和Ⅳ类水。

Based on the 1:50,000 hydrogeological survey of Baoji County,the groundwater samples were systematically collected in the area,combined with the hydrogeological conditions of the study area,the hydro-chemical characteristics of the groundwater in the area were studied,and the groundwater quality was evaluated.Through statistical analysis of water quali⁃ty results,the chemical types of diving water in the study area can be divided into HCO_(3)-Ca,HCO_(3)-Ca·Mg,HCO_(3)-Ca·Mg·Na,HCO_(3)-Ca·Na and HCO_(3)-Na·Mg type water.The hydro-chemical types of confined water in the study area can be divided into HCO_(3)-Ca,HCO_(3)-Ca·Mg,HCO_(3)-Ca·Mg·Na,HCO_(3)-Ca·Na and HCO_(3)-Na·Ca·Mg type water.According to the"Quality Standard for Groundwater"(GB/T14848-2017),the groundwater in the study area is clas⁃sified and evaluated.The groundwater in the area is mainly Class Ⅲ water,and a small part is Class Ⅱ water and Class Ⅳ water.