摘要
水文地球化学探测是研究地下水成因和评价地下水资源的有效手段。本文对柳江盆地大石河流域地表水的常规离子浓度、氢氧同位素组成和微量组分含量进行了分析,研究了水的化学类型及特征,并进行了水质评价。结果表明,该流域水的矿化度(TDS)为0.04~0.68 g/L,舒卡列夫分类表明大部分水样的化学类型为HCO3·SO4-Ca型,局部岩石类型影响流域水化学类型。氢、氧同位素组成分别为-7.3‰^-9.8‰和-51.8‰^-70.2‰,分布在大气降水线附近,表明研究区地表水主要来源于大气降水。水中溶解的矿物质主要来源于局域性岩石和土壤的风化溶解,并且受人为活动的影响。单因子评价指数水质评价法确定该地区地表水水质尚可。
The hydrogeochemical exploration is an effective method to study the genesis of groundwater and to evaluate groundwater resources. By analyzing the conventional ions, hydrogen and oxygen isotopes and trace elements in water, the chemical types and characteristics of surface water in the Dashi River Basin of the Liujiang basin were studied, and the water quality evaluation was carried out. The results showed that most of the water samples were classified chemically into the HCO3·SO4-Ca type by the Sukarev’s method with low TDS(total dissolved solids) values of 0.04 to 0.68 g/L, indicating controls by different types of soil and rock in tributary areas. Values of δD and δ18O ranged from-7.3‰ to-9.8‰ and from-51.8‰ to-70.2‰, respectively, distributed near the atmospheric precipitation line, indicating that the surface water in the study area derived mainly from the atmospheric precipitation. The dissolved minerals in water derived mainly from the weathering and dissolution of local rocks and soils and received influences from human activities. The assessment of water quality using the single factor evaluation index method indicated that the surface water quality of the study area is acceptable.
作者
边智聪
崔月菊
李静
杜建国
BIAN Zhi-cong;CUI Yue-ju;LI Jing;DU Jian-guo(Key Laboratory of Earthquake Prediction,Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China;Institute of Disaster Prevention,Beijing 065201,China)
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2019年第5期953-960,共8页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
中国地震局基本科研业务费专项(2018IEF010204,2016IES010103)
关键词
柳江盆地
水文地球化学
氢、氧同位素
水质评价
Liujiang Basin
hydrogeochemistry
hydrogen and oxygen isotopes
water quality evaluation
