摘要:
提要：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。
Abstract:
Abstract：In this study, the authors investigated the hydro-chemical features and distribution of predominant constituents and ions in the groundwater of western Hetao Plain, Inner Mongolia, based on field survey and analyses of 400 water samples. The results indicate that the groundwater quality is generally not satisfactory because the densities of As, Cl-, SO2-4, TDS, total hardness, F- and Fe are in excess of the standard levels. Hydrochemical types in the study area are mostly Cl-HCO3-Na, Cl-Na, and HCO3-Cl-Na. Predominant components such as As, P, Fe, Cl-, F-and SO2-4 are distributed along the boundary of the alluvial and proluvial fans in the northwest of the study area and the alluvial plain with lower topography as well as Langshan Town in northern Linhe area. Furthermore, this study presents the correlations of all the 14 tested constituents based on methods of correlation analysis and multi-variable linear regression. It is shown that the relations between P, Fe and As are significant.
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