地电阻率与水位关系的机理分析  

Analysis on the Relationship between Changes of Ground Resistivity and Water Level

作　　者：沈红会[1] 叶碧文[1] 孙春仙[1] 祝涛 SHEN Hong-hui;YE Bi-wen;SUN Chun-xian;ZHU Tao(Jiangsu Earthquake Administration,Nanjing 210014,China)

机构地区：[1]江苏省地震局,南京210014

出　　处：《地震》2020年第4期183-190,共8页Earthquake

基　　金：江苏省地震局局长基金(17410)。

摘　　要：从地电阻率的观测理论出发,指出地电阻率场地的电性结构、岩石的饱和度和孔隙度决定了地电阻率和水位的关系。在长期的观测资料基础上,通过实例系统地分析了地电阻率和水位的关系,给出了不同层位的水位变化和不同方式的水位变化对地电阻率观测结果的影响,认为非构造水位变化与地电阻率的关系主要取决于表层土壤或岩石的水饱和度,构造水位变化与地电阻率变化存在明确的相关关系,从而进一步探讨了与前兆异常有关的水位和地电阻率变化。Based on the observation theory of ground resistivity,it is pointed out that the relationship between the earth resistivity and the water level is determined by the electrical structure of ground resistivity field,rock saturation,as well as the porosity.By the long-term observation data,the relationship between ground resistivity and water level is systematically analyzed.The influence of water changes in different horizons on ground resistivity has been given.It is considered that the relationship between atectonic water level changes and ground resistivity mainly depends on the water saturation of surface soil or rock.There is a clear correlation between the change of the water level,which related to the tectonic movements,and the change of the ground resistivity.Further more,the changes of water level and ground resistivity related to the precursor anomaly has been discussed in this paper.

关 键 词：地电阻率 构造水位 电性结构 饱和度 孔隙度 

分 类 号：P319.2[天文地球—固体地球物理学]