Abstract:As an array electrical exploration method, high density resistivity method can realize the function of data acquisition with various arrangement devices by changing the arrangement of power supply and observation electrodes. It has the characteristics of low cost and high efficiency, and has been widely used in the fields of environmental geology, engineering geology and mineral geology. In order to explore the characteristics of the application effect of each arrangement device in different geological backgrounds and exploration targets, three kinds of devices, such as Wenner, dipole—dipole and Schlumberger (section) are selected in this paper to compare their application effects in the seepage detection of reservoir dam and groundwater exploration, and to study the characteristics of each arrangement device. It is showed that Wenner device has obvious advantages in exploration depth, high longitudinal resolution, high construction efficiency, good data fitting effect, high signaltonoise ratio and strong antiinterference ability. The dipole—dipole device has high lateral resolution, more detailed horizontal anomalies, and higher construction efficiency. The Schlumberger (profile) device has higher transverse and longitudinal resolution, more collected data points, richer obtained geoelectric section information, stronger antiinterference ability, deeper exploration depth, and better data fitting effect. It is concluded that Schlumberger (profile) device is suitable to be applied in seepage detection of reservoir dam, Wenner device is suitable to be used in exploration of quaternary aquifer.
