妫水河流域水化学和同位素特征及其指示意义  

Hydrochemistry and Isotopic Characteristics of Guishui River Basin and Their Indicative Significance

作　　者：韦欣 于一雷 李文彦[2] 吕翠翠[2] 霍炜洁[3] WEI Xin;YU Yilei;LI Wenyan;LYU Cuicui;HUO Weijie(College of Ecology and Environment,Institute of Disaster Prevention,Sanhe 065201,China;Xiong’an Innovation Research Institute(Build),Chinese Academy of Sciences,Xiong’an New Area 071899,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]防灾科技学院生态环境学院,河北三河065201 [2]中国科学院雄安创新研究院(筹),河北雄安新区071899 [3]中国水利水电科学研究院,北京100038

出　　处：《环境科学与技术》2024年第3期135-145,共11页Environmental Science & Technology

基　　金：地下水污染控制与修复教育部工程研究中心开放基金(GW202212);河北省重大科技成果转化专项(23267201Z)。

摘　　要：为研究北京妫水河流域河水和地下水的水化学成因以及相互关系,文章采用Piper三线图、Gibbs图、多元统计分析和模糊综合评价等方法对妫水河流域2019年采集到的河水、浅层地下水和深层地下水水样进行分析。结果表明,妫水河流域河水和地下水均属于弱碱性水;硝态氮是水体中氮素的主要存在形态;河水、浅层地下水和深层地下水的优势阴离子均为HCO_(3)^(-),河水和浅层地下水的优势阳离子为Ca^(2+),而深层地下水的优势阳离子为Na^(+)和Ca^(2+);水质整体较好,Ⅰ类水占比均超70%。流域水体氢氧同位素(δD、δ^(18)O和δ^(17)O)特征深度变化明显,因河水受较强烈的蒸发作用,自地表往下同位素逐渐相对贫化。岩石风化是流域水体溶质的主要来源,蒸发盐岩、碳酸盐岩和硅酸盐岩占主导作用;另外,区域内农业活动也是水体溶质的重要影响因素。In order to study the hydrochemical origin and relationship between river water and groundwater in the Guishui River Basin in Beijing,Piper three-line diagram,Gibbs diagram and multivariate statistical analysis,fuzzy comprehensive evaluation and other methods were used to analyze the river water,shallow groundwater and deep groundwater samples collected in 2019 in the Basin.The results show that both river water and groundwater belong to weakly alkaline water;nitrate nitrogen is the main form of nitrogen in the water body;the dominant anion of river water,shallow groundwater,and deep groundwater is HCO_(3)^(-),the dominant cation of river water and shallow groundwater is Ca^(2+),while the dominant cations of deep groundwater are Na^(+)and Ca^(2+).The water quality is generally good,with ClassⅠwater accounting for over 70%.The characteristics of hydrogen and oxygen isotopes(δD,δ^(18)O andδ^(17)O)in the basin water vary significantly in depth.Because the river water is subject to strong evaporation,the isotopes gradually become relatively depleted from the surface downwards.Rock weathering is the main source of solutes in water bodies in the basin,with evaporite rocks,carbonate rocks and silicate rocks playing a leading role.In addition,agricultural activities in the region are also an important factor affecting water solutes.

关 键 词：妫水河流域 水化学 氢氧同位素 河水 地下水 

分 类 号：X52[环境科学与工程—环境工程]