摘要
为研究丰沛平原浅层地下水化学特征及主要离子来源,采集浅层地下水样品27组,采用数理统计、舒卡列夫分类、Gibbs图和离子比例系数等方法,对丰沛平原浅层地下水化学特征及形成作用进行了研究。结果表明:研究区地下水中的阳离子以Na^(+)和Ca^(2+)为主,阴离子以HCO_(3)^(-)为主,HCO_(3)^(-)、Mg^(2+)和Ca^(2+)的空间变异系数相对较小,NO_(3)^(-)变异系数较大。根据沉积环境不同,浅层地下水化学类型具有明显的水平分布过渡带,浅层地下水在黄淮海冲积平原沿着浅层地下水流向自西南向北东方向水化学类型阴离子从HCO_(3)→HCO_(3)-Cl→HCO_(3)-SO_(4)→SO_(4)-HCO_(3)型过渡,阳离子从Ca-Na-Mg→Na-Mg-Ca→Na-Mg型过渡,微山湖沿岸冲湖积平原主要分布HCO_(3)-Cl·Ca-Mg-Na型水。岩石风化作用、蒸发结晶作用、离子交换作用是影响研究区地下水化学组分的主要因素。部分地区地下水受工矿活动影响较大,受农业活动和生活污水排放影响较小,呈点状分布。
To study the hydrochemical characteristics and main ion source of shallow groundwater in Fengpei plain area,27 groups of shallow groundwater samples were collected,and mathematical statistics,Sukalev classification,Gibbs diagram,and the methods of ion scale coefficients were used to reveal the hydrochemical characteristics and forming effect of shallow groundwater in Fengpei plain area.The results show that the cation and anionic is mainly Na^(+),Ca^(2+)and HCO_(3)^(-),HCO_(3)^(-),respectively.The spatial variation coefficient of Mg^(2+)and Ca^(2+)is relatively small,while is large for NO_(3)^(-).The hydrochemical types in the whole area have obvious horizontal distribution bands according to the different sedimentary environments.In the Huang-Huai-Hai alluvial plain,the hydrochemical types of shallow groundwater transition from HCO_(3)→HCO_(3)-Cl→HCO_(3)-SO_(4)→SO_(4)-HCO_(3) along the shallow groundwater flow field from southwest to northeast,and the cation transition from Ca-Na-Mg→Na-Mg-Ca→Na-Mg.HCO_(3)-Cl·Ca-Mg-Na is mainly distributed in the alluvial plain of Weishan Lake.Rock weathering,evaporation and crystallization,and ion exchange are the main effects on the formation of shallow groundwater hydrochemical components in this area.In addition,the shallow groundwater in some areas is more affected by industrial and mining activities,less affected by agricultural activities and domestic sewage discharge which showing a point distribution.
作者
朱春芳
龚建师
周锴锷
王赫生
李亮
陶小虎
叶永红
ZHU Chunfang;GONG Jianshi;ZHOU Kaie;WANG Heshen;LI Liang;TAO Xiaohu;YE Yonghong(Nanjing Center,China Geological Survey,Nanjing 210016,China)
出处
《地球与环境》
CAS
CSCD
北大核心
2022年第6期797-804,共8页
Earth and Environment
基金
中国地质调查局“沙颍河-涡河流域水文地质调查”(DD20190354)项目。
关键词
地下水
丰沛平原
水化学特征
离子来源
groundwater
Fengpei plain
hydrochemical characteristics
ion source
