Hydrochemical characteristics and hydrogeochemical modeling of groundwater in a certain potential radioactive waste disposal site in Northwest China
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摘要: 在放射性废物处置库的选址过程中,地下水水化学特征是最重要的因素之一。为了查明西北某放射性废物处置预选区地下水水化学特征及其演化机制,对该区地下水水样进行了水质测试,综合运用Piper三线图法、相关性分析、饱和指数模拟和质量平衡反应模拟,全面分析了该预选区地下水水化学类型的空间分布和地下水水演化的主要水文化学过程。结果表明:研究区地下水在北部山区接受补给,并向南运移,地下水类型随径流由SO4.Cl—Na型转变为Cl.SO4—Na型。地下水在径流过程中主要经历了溶滤作用、蒸发浓缩作用和阳离子交换作用等水文化学过程,它们是控制该区地下水水化学组分演化的关键。Abstract: In the site selection for radioactive waste repository,hydrochemical characteristics of groundwater are the most important evaluation factors.In order to study the hydrochemical characteristics and chemical evolution mechanism of groundwater in a certain potential radioactive waste disposal site in northwest China,the groundwater samples were tested.Based on the data,the Piper diagram,the correlation matrices,the saturation index simulation and the mass balance reaction model were used to gain t...
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