北大港水库水体和地下水水化学特征及成因  

Chemical Characteristics and Origin of Water and Groundwater in Beidagang Reservoir

作　　者：王浩然 李海明[1,2,3] 李梦娣[1,2,3] 肖瀚 西雷 WANG Haoran;LI Haiming;LI Mengdi;XIAO Han;XI Lei(Laboratory of Coastal Groundwater Utilization&Protection,Tianjin University of Science&Technology,Tianjin 300457,China;College of Marine and Environmental Sciences,Tianjin University of Science&Technology,Tianjin 300457,China;Key Laboratory of Marine Resources Chemistry and Food Technology,Ministry of Education,Tianjin 300457,China;State Key Laboratory of Groundwater Pollution Simulation and Control,Chinese Academy of Environmental Sciences,Beijing 100012,China)

机构地区：[1]天津科技大学滨海地下水利用与保护实验室,天津300457 [2]天津科技大学海洋与环境学院,天津300457 [3]海洋化学资源与食品技术教育部重点实验室,天津300457 [4]中国环境科学研究院国家环境保护地下水污染模拟与控制重点实验室,北京100012

出　　处：《人民黄河》2023年第8期107-113,共7页Yellow River

基　　金：国家自然科学基金资助项目(42072288)。

摘　　要：北大港水库水体咸化问题突出,地下水也存在咸化现象。通过采集北大港水库水和浅层地下水样品,利用水化学特征分析、主成分分析、离子比例分析等方法探究北大港水库水、浅层地下水咸化原因。结果表明:北大港水库水与周边浅层地下水均受到了蒸发浓缩作用影响,各水库水离子分布相对均匀,浅层地下水离子质量浓度空间分布差异较大;北大港水库水与靠近水库区域的浅层地下水表现出高Na^(+)、高Cl^(-)的特征,靠近渤海的地下水中Mg^(2+)与SO■在各离子含量中占主导地位;北大港水库水与地下水的Na+和K+主要源于盐岩的溶解,Ca^(2+)、Mg^(2+)则源于碳酸盐与硫酸盐的溶解;岩盐、碳酸盐、含镁矿物的溶解或沉淀是水库水咸化的主要原因,地下水还受到了硫酸盐与钾盐的影响。The issue of water salinity in Beidagang Reservoir is prominent,and the phenomenon of groundwater salinity also exists.By collec⁃ting water and shallow groundwater samples from Beidagang Reservoir,this study explored the hydrogeochemical mechanism of shallow groundwater salinization in Beidagang Reservoir by means of hydrochemical characteristic analysis,principal component analysis and ion pro⁃portion analysis.The results show that the water body of Beidagang Reservoir and the surrounding shallow groundwater are affected by evapo⁃ration and crystallization.The distribution of ions in the water of each reservoir is relatively uniform,and the spatial distribution of ion con⁃centration in the shallow groundwater varies greatly.The contents of Na+and Cl^(-)in the water of Beidagang Reservoir and the shallow ground⁃water near the reservoir area are very high,and Mg^(2+)and SO_(4)^(2-) in the groundwater near Bohai Sea play a dominant role in the contents of each ion Ion ratio analysis shows that Na+and K+of water and groundwater in Beidagang Reservoir mainly come from the dissolution of salt rock,while Ca^(2+)and Mg^(2+)come from the dissolution of carbonate and sulfate.The dissolution and precipitation of rock salt,carbonate and magnesi⁃um salt is the main reason of salinization of reservoir water,and the groundwater is also affected by sulfate and potassium salt.

关 键 词：水体咸化 水化学特征 水文地球化学 北大港水库 

分 类 号：X524[环境科学与工程—环境工程]