大沽河流域地下水水化学及同位素特征  

Hydrogeochemical and Isotopic Characteristics of Groundwater in Dagu River Basin

作　　者：熊贵耀 付腾飞 韩江波[5,6] 陈广泉 徐兴永 徐秀丽 刘贯群[7] 刘文全[2,3,4] XIONG Gui-yao;FU Teng-fei;HAN Jiang-bo;CHEN Guang-quan;XU Xing-yong;XU Xiu-li;LIU Guan-qun;LIU Wen-quan(School of Ocean Sciences,China University of Geoscience,Beijing 100083,China;First Institute of Oceanography,MNR,Qingdao 266061,China;Key Laboratory of Marine Sedimentology and Environmental Geology,MNR,Qingdao 266061,China;Laboratory for Marine Geology,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266061,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing 210029,China;College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国地质大学(北京)海洋学院,北京100083 [2]自然资源部第一海洋研究所,山东青岛266061 [3]自然资源部海洋沉积与环境地质重点实验室,山东青岛266061 [4]青岛海洋科学与技术试点国家实验室海洋地质过程与环境功能实验室,山东青岛266061 [5]南京水利科学研究院,江苏南京210029 [6]水文水资源与水利工程科学国家重点实验室,江苏南京210029 [7]中国海洋大学环境科学与工程学院,山东青岛266100

出　　处：《海洋科学进展》2019年第4期626-637,共12页Advances in Marine Science

基　　金：国家重点基础研究发展计划项目——海平面上升对沿海地区海水入侵的影响研究(2016YFC0402804);中央级公益性科研院所基本科研业务费专项资金资助项目——莱州湾南岸地下水中镭同位素运移机制及其对海水入侵的指示作用(2017Q02);国家自然科学基金项目——海水入侵-盐渍化灾害链的水盐运移机制及电阻率判定研究(41706068)

摘　　要：大沽河是青岛市重要的供水源之一,了解大沽河流域水循环的过程和机理有助于合理地利用大沽河流域水资源。为了研究大沽河流域地下水循环的规律,在大沽河李哥庄镇至胶东镇段研究区内采集了26个地下水样本和4个地表水样本,测定其氢、氧同位素及水化学成分,通过分析其变化特征初步判定地下水补给来源以及影响因素。对降水和地下水中的稳定同位素组成(δD,δ^18O)进行分析,结果表明大气降水是该区域地下水的主要来源。地下水及地表水的水化学结果表明研究区地下水类型多样,主要为HCO3-Cl-SO4-Ca-Na,Cl-SO4-Na,Cl-HCO3-SO4-Na,HCO3-Cl-SO4-Na-Ca-Mg,Cl-Na五类;地表水受到强烈的蒸发浓缩作用,并在一定程度上补给了地下水。同时,地下水中的氢、氧同位素含量与Cl-和TDS区域分布特征相互佐证,证明地下水化学成分主要受到海水入侵的影响,其次为围岩矿物的溶解。Dagu River is an important source of water supply for Qingdao City.Understanding the process and mechanism of water cycle in Dagu River Basin is helpful to rationally utilizing the water resources of Dagu River Basin.In order to understand groundwater circulation and environmental change in the Basin,we sampled the groundwater and surface water from Ligezhuang Town to Jiaodong Town along the Dagu River,and analyzed their stable isotope compositions(δD,δ^18O)and hydrochemical compositions.By analyzing variation characteristics of groundwater,this study preliminarily determined the recharge sources of groundwater and its influencing factors.The stable isotopic compositions(δD,δ^18O)of precipitation and groundwater showed that precipitation was the main source of groundwater in the region.The hydrochemical results of groundwater and surface water showed that types of groundwater in the study area were diverse and included the following types,HCO3-Cl-SO4-Ca-Na,Cl-SO4-Na,Cl-HCO3-SO4-Na,HCO3-Cl-SO4-Na-Ca-Mg,Cl-Na.Surface water was strongly evaporated and concentrated,and it recharged groundwater to some extent.The hydrogen and oxygen isotope compositions of groundwater and the regional distribution characteristics of Cl-and TDS proved that the chemical composition of groundwater was affected by two factors,seawater intrusion(mainly)and the dissolution of surrounding rock minerals(minor).

关 键 词：大沽河流域 水化学特征 同位素特征 海水入侵 

分 类 号：P641[天文地球—地质矿产勘探]