天津地区地表水咸化的水化学证据  

HYDROCHEMICAL EVIDENCE OF SURFACE WATER SALINIZATION PROCESS IN THE TIANJIN COASTAL PLAIN,CHINA

作　　者：李军[1] 刘丛强[2] 岳甫均[2] 朱兆洲[1] 张国平[2] 项萌[2] 李勇[1] 

机构地区：[1]天津师范大学,水环境与水资源重点实验室,天津300384 [2]中国科学院地球化学研究所,环境地球化学国家重点实验室,贵阳550002

出　　处：《环境化学》2010年第2期285-289,共5页Environmental Chemistry

基　　金：天津市科技发展计划项目(06YFSZSF05100);天津市应用基础及前沿技术研究计划(09JCZDJC25900、09JCYBJC07900);国家自然科学基金(40803002);环境地球化学国家重点实验室开放课题(SKLEG9004);天津师范大学博士基金(52LX24)

摘　　要：为了解天津滨海地区咸/海水入侵的水化学特征,对该区地表水的化学组成进行了全面研究.结果显示,由山前平原到滨海平原,水化学的组成呈明显的地带性分布.研究水体TDS的含量较高,咸化程度明显,由淡水逐渐向卤水演化;同时,水化学类型由HCO3-Ca型,以及其它混合类型逐渐向Cl-Na型演化.Gibbs图解分析表明,蒸发-浓缩作用是控制该区地表水化学组成的主要原因;而咸/海水入侵以及由其导致的阳离子交换反应、碳酸钙的沉淀/溶解等对其也有重要的影响.The coastal area of Tianjin is one of the salt/sea water intrusion regions in China. In order to understand the chemical characteristics of the salt/sea water intrusion and surface water salinization in Tianjin, the chemi- cal compositions of surface water were investigated. The results show that the chemical compositions of surface water vary obviously towards the coast. The high TDS contents of surface water samples show a significant salinization process. Meanwhile, the water quality transforms gradually from fresh water to brine water, accom- panied with the change of water chemical type from the HCO3-Ca type to the C1-Na type. According to the Gibbs graph analysis, chemical compositions of most water samples are evidently affected by the evaporation- condensation process. Moreover, cation-exchange and carbonate dissolution/precipitation induced by saline/sea water intrusion have also a strong impact on the chemical composition of surface water in Tianjin.

关 键 词：天津 地表水 化学特征 咸化 咸/海水人侵. 

分 类 号：X52[环境科学与工程—环境工程]