河北兴济台地电阻率年变特征分析

Annual variation characteristics of georesistivity at Xingji Seismic Station，Hebei Province

摘要:

基于电测深曲线反演结果，利用地电阻率转换函数的递推公式定量模拟分析了地下水位对兴济台地电阻率的影响。结果表明，地下水位下降会造成地电阻率上升，这与兴济台N30°E向的地电阻率观测结果相符；N60°W向的地电阻率的趋势变化与N30°E向的相反，且年变幅较大，这是由于测区供电极和测量极之间存在因取土而积水成坑这个局部异常体引起的。

Abstract:

Based on the electrical sounding of Xingji Seismic Station，we used the transform function recursive formula to analyze the resistivity variation caused by the ground water level. The result of the model suggests that the ascent of the ground water level can cause georesistivity to rise，which is consistent with the georesistivity observation in N30°E direction at Xingji Seismic Station，but the geosistivity change in N60°W is opposite to that of N30°E and the amplitude of the annual variation of N60°W is bigger than that of N30°E. That was caused by an excavation pit between the electrode N and the power supply electrode B.