中国地质2024，Vol.51Issue(2)：663-675,13.DOI:10.12029/gc20220401003
陕西北洛河流域地下水水化学和同位素特征及其水质评价
Hydrochemistry-isotope characteristics and quality assessment of groundwater in the Beiluo River Basin,Shaanxi Province
摘要
Abstract
This paper is the result of hydrogeological survey engineering. [Objective]The Beiluo River Basin is an important secondary tributary of the Yellow River.Research on groundwater quality in typical tributary basin of theYellow River is of significant for ecological protection and high-quality development.To ensure local drinking water safety,we systematically identified status of groundwater quality and delineated inferior groundwater region in the Beiluo River Basin.[Methods]Besides,based on analysis of D-18O isotope in groundwater,characteristics and evolution mechanism of groundwater hydrochemistry were studied and effects of hydrogeological condition and anthropogenic activities on groundwater hydrochemistry were revealed.[Results]Groundwater hydrochemical composition was jointly affected by rock weathering and evaporation concentration,part of which was influenced by anthropogenic activities.D-18O isotope composition suggested that evaporation concentration is the major influence factor of groundwater hydrogeochemistry.[Conclusions]Leaching of soluble minerals such as gypsum halite in clasolite and evaporation concentration of pore water in Cenozoic faulted basin in the downstream caused salt accumulation and high TDS in groundwater in the upstream and downstream,respectively.Hydrochemical composition of groundwater in Ordovician karst aquifer and Cenozoic faulted basin aquifer was mainly controlled by evaporites and anthropogenic activities.While hydrochemical composition in Cretaceous aquifer and Carboniferous-Jurassic aquifer was mainly controlled by rock weathering(especially silicate rocks and evaporite)and less affected by anthropogenic activities.Moreover,groundwater in the upstream and downstream was significantly affected by industrial and mining activities.While groundwater in the midstream is of good quality due to less influence of industrial/mining activities,agricultural activities and domestic wastewater.关键词
水化学/D-18O同位素/地下水水质评价/北洛河流域/水文地质调查工程/陕西Key words
hydrochemistry/D-18O isotope/groundwater quality assessment/Beiluo River Basin/hydrogeology survey engineering/Shaanxi Province分类
资源环境引用本文复制引用
周殷竹,马涛,袁磊,李甫成,韩双宝,周金龙,李勇..陕西北洛河流域地下水水化学和同位素特征及其水质评价[J].中国地质,2024,51(2):663-675,13.基金项目
中国地质调查局项目(DD20190333)资助. Supported by the project of China Geological Survey(No.DD20190333). （DD20190333）
