含水层渗流突变过程地电场响应的物理模拟

根据渗流地电场原理，建立砂质含水层渗流电测物理模型，并采用网络并行电法技术，对模型注水和放水过程中的电性参数进行实时测量。实验结果表明：向含水层注水时，含水层的自然电位先期出现一极小值，随后表现为上升趋势并达到极大值，含水层激励电流和激励电位呈上升趋势。含水层放水突变时，N极在自由空间，自然电位下降；N极在水源空间，自然电位上升；B、N极在同一空间，激励电位下降；B、N极处于不同空间，激励电位上升；激励电流不受B、N极所在空间影响，保持稳定。放水结束后，自然电位和激励电位呈下降趋势，激励电流明显下降，对不饱和水量敏感性好。视电阻率值可以表征含水层的注水、放水过程，其值的高低与砂层含水量成反比。

Physical simulation research on response to geoelectricity of the aquifer in seepage mutation process

According to the principle of geoelectric field,the seepage-electric model of water-bearing sand layer was established.With the network parallel electrical technique,electrical parameters were real-time monitored in the process of water injection and water discharge of the model.The results show that during water injection,the spontaneous potential appeares upward and reaches maximum after a lower turning point at first.Meanwhile the exciting voltage and exciting current are gradually on the rise.When water...