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本文通过实地调查,按照一定的间距在内蒙古河套平原西部采集和分析了400组地下水水质样品,通过分析研究这些水质测试数据,初步掌握了地下水的水化学特征和其主要元素及离子的分布规律。水化学分析结果表明:研究区的地下水水质总体较差,砷、氯化物、硫酸盐、溶解性总固体、总硬度、氟化物和铁等多项指标超标;区内地下水化学类型以Cl·HCO3-Na、Cl-Na、HCO3·Cl-Na型为主;主要组分分布图表明,砷、磷、铁、氯化物、氟化物、硫酸盐等含量较高的点主要分布在研究区西北部地势较低的山前冲、洪积扇扇裙前缘和地势相对低洼的冲积平原以及临河区北部的狼山镇一带。通过对14种水质测试指标值进行多元线性回归分析结果表明,研究区地下水中砷与磷、铁含量具有密切的相关关系。
In this paper, 400 groups of groundwater quality samples were collected and analyzed in western Hetao plain of Inner Mongolia through field investigation. Based on the analysis of these water quality test data, the hydration characteristics of groundwater and the distribution of its main elements and ions were preliminary mastered. The results of chemical analysis of water show that the groundwater quality in the study area is generally poor, and many indicators such as arsenic, chloride, sulfate, total dissolved solids, total hardness, fluoride and iron exceed the standard. The groundwater chemical types in the study area are Cl · HCO3 -Na, Cl-Na and HCO3 · Cl-Na. The distribution of main components showed that the arsenic, phosphorus, iron, chloride, fluoride and sulfate were mainly distributed in the northwest of the study area The lower frontier, the front of the alluvial fan fan skirt and the relatively low-lying alluvial plain and the town of Langshan in the northern part of Linhe area. The results of multivariate linear regression analysis of 14 water quality indicators showed that there was a close correlation between arsenic, phosphorus and iron in groundwater in the study area.