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中文摘要：
通过砂岩地层渗透过程中不同部位的地电场响应特点试验,获得了砂岩断面渗水过程中地电场参数瞬时响应规律。注水渗透过程中,模型各电极测试点位置的自然电位均呈现为升高的趋势,并且砂层非饱和厚度与自然电位值之间体现出很好线性相关关系。在水位上升至测点位置后,激励电流出现阶跃突变,之后呈现为一个相对平稳的数值。利用渗流过程中不同位置自然电位和激励电流的变化特征,可判定砂层中水的渗流方向、渗流速度和渗漏点位置。
英文摘要：
By use of the model for seepage-electric tests,the temporal-spatial domain parameters of geoelectric field in the course of seepage are gained.Based on the characteristics of potential and current isochrones,the experiment shows that natural electric field represents the rising trend in the temporal-spatial field of the seepage course.From the test,one can obtain the linear relationship between natural potential electrode and unsaturated layer thickness.When the water level rises to the measuring point,the excitation current suddenly increases to a steady state.From the changes of exciting voltages and currents at different positions,the information of flow direction,seepage velocity and leakage point can be obatained.
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