Relationship between apparent resistivity and chloride ion concentration in seawater intrusion areas: A case study of Qinhuangdao
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摘要: 为划分海水入侵界线,在秦皇岛沿海疑似海水入侵地区开展了高密度电阻率法勘察工作,并基于该成果对视电阻率与氯离子浓度的关系进行了分析总结。从统计分析不同地质分区的电法测井视电阻率值与对应井所采集水样得到的氯离子浓度的对应关系着手,通过数理分析求取二者之间的相关关系,得出研究区内二者的对应线性关系式,利用该关系式并结合高密度电法测量成果划分出研究区海水入侵界线。本次研究过程及最终所得关系式成果将为类似区域后续工作提供经验借鉴和方法指导。Abstract: This study mainly analyzes and summarizes the relationship between the apparent resistivity and chloride ion concentration in the process of determining the seawater intrusion boundaries of suspected seawater intrusion areas in Qinhuangdao coastal areas using results obtained by the high-density resistivity method. Firstly, this study conducted the statistical analysis of the corresponding relationship between apparent resistivity values obtained through resistivity logging in different geological zones and the chloride ion concentration obtained from water samples collected from corresponding wells. Based on this, the correlation between them was obtained through mathematical analysis, and then the corresponding linear relationship between them was determined. Finally, seawater intrusion areas in the study area were delineated using this relationship combined with the measurement results obtained by the high-density resistivity method. The research process and the final linear relationship will provide experience and methodological guidance for the follow-up work in similar regions.
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