桂林理工大学学报2023，Vol.43Issue(4)：598-607,10.DOI:10.3969/j.issn.1674-9057.2023.04.007
河套平原杭锦后旗北部浅层地下水砷富集水文地质特征
Hydrogeological characteristics of arsenic enrichment in shallow groundwater in the north of Hangjinhouqi of Hetao Plain
摘要
Abstract
The piedmont area in the north of Hangjinhouqi of Hetao Plain is the main water source for residents of the Yellow River Basin.The groundwater is characterized by high arsenic,but the distribution pattern of arse-nic is unknown,which poses a threat to water safety for the residents.In this study,295 groups of shallow groundwater samples and 8 groups of sediment samples were collected to find out the pattern and origin of arse-nic enrichment in groundwater in this area.Combined with the results of two holes and seven layers of hydrologi-cal monitoring boreholes and geophysical exploration,the hydrogeological structure,distribution and hydrochem-ical characteristics of the shallow water-bearing system in the north of the piedmountain alluvial and diluvial in-cline plain and the Yellow River alluvial plain were analyzed,and the distribution and enrichment environment of arsenic in the groundwater were discussed.The results show that the arsenic content of groundwater exhibits a clear strip-shaped distribution.Horizontally,from the top of alluvial fan to the plain area,the arsenic content increases from<10.0 μg/L to>400.0 μg/L,and the sediment particles gradually become finer,from oxidation environment to reduction environment,which promotes the release and enrichment of arsenic.Vertically,arse-nic-rich groundwater is distributed in three depth of 20-23 m,40-50 m and 60-70 m.The hydrochemical characteristics show that it is a weak alkali reduction environment,and the chemical type of groundwater is mainly Cl·HCO3-Na·Ca.关键词
水文地质/浅层地下水/砷富集/杭锦后旗/河套平原Key words
hydrogeology/shallow groundwater/arsenic enrichment/Hangjinhouqi/Hetao Plain引用本文复制引用
林高聪,韩双宝,马涛,姚秀菊,连晟..河套平原杭锦后旗北部浅层地下水砷富集水文地质特征[J].桂林理工大学学报,2023,43(4):598-607,10.基金项目
中国地质调查局项目(DD20221754) （DD20221754）
