基于新旧规范的甘肃灵台矿区地下水水质评价

Assessment on the underground water quality of Lingtai mining area in Gansu Province

分别选取pH值、总硬度、矿化度和SO_(42-)、CI^-浓度等5项指标,采用《地下水质量标准》(DZ/T 0290-2015)和《地下水质量标准》(GB/T14848-93)关于水质评价的新旧规定,对甘肃灵台矿区第四系潜水、白垩系承压水组、中侏罗系上承压水组和中侏罗系下承压水组进行了水质评价。第四系孔隙潜水水质综合类别为Ⅱ类、地下水质量良好,适用于各种用途,建议在开发利用中注意节约与保护;白垩系承压水组水质综合类别为Ⅴ类、地下水质量极差,该层地下水不宜饮用,其他用水建议根据使用目的选用;中侏罗上承压水组、中侏罗下承压水组水质综合类别为Ⅴ类、地下水质量极差,不建议开发利用,在矿区开发中要避免该层地下水污染其他水体。

Using the new and old standards of＂the groundwater quality standard＂（ DZ / T 0290- 2015） and＂the groundwater quality standard＂（ GB / T14848- 93）,selecting 5 evaluation indexes of PH value,total hardness,water salinity and concentration of sulfate and chloride,the water quality assessment of quaternary phreatic water,Cretaceous confined water group,middle Jurassic upper confined water group and middle Jurassic lower confined water group in Lingtai mining area of Gansu Province was carried out. The comprehensive water quality of Quaternary pore phreatic water is II class and the groundwater quality is good,which is suitable for various purposes and should be paid attention to saving and protection in development and utilization. The comprehensive water quality of Cretaceous confined water group is V class and the groundwater quality is very poor,which is unsafe for drinking. The comprehensive water quality of middle Jurassic upper confined water group and middle Jurassic lower confined water group is also V class,which is not suitable for development and utilization.