Induced Polarization Method applied for groundwater resource exploration

Induced Polarization Method (IP) has been widely used in groundwater resource exploration; the reason is that this Method is immune to the influences caused by topographic factors and uneven resistivity of surrounding rock. Numerous experiment results indicate that linear increase of half-life period for aquifer is resulted with the increasing of exciting current when exciting current is larger than critical current; while half-life period for non-aquifer remains unchanged or is shortened. As a result, aquifer and non-aquifer can be identified by the great-small and plus-minus values gained by two time-difference method. As there has negative correlation between rate of deviation and moisture content; which means moisture content increases with deviation rate decreases; therefore, the parameter for deviation rate on aquifer is of low value. Since all the data of discharging curve had been adopted when computing the parameter of deviation rate, immunity interference was strong. In this thesis, the Author has introduced the principles, of two time-difference method and deviation rate parameter method for groundwater exploration; by resorting to a number of application cases, the application effect has been explained. Applications show that reasonable application of the two methods in actual groundwater exploration gets more done in less time.