Application of the Newly Frequency Domain Electromagnetic Method Survey in a Landslide Area

Geophysical survey in a Landslide area is mainly perfomred by measuring the elastic wave velocity or electric resistivity. The electrical resistivity is well known to reflect the information in a slope, which can be obtained by the seismic prospecting or electrical resistivity survey. The commonly used electrical resistivity survey has disadvantage sometimes due to local ground conditions during the installation of electrodes and layout of electric cables on the hard material. On the other hand, the frequency domain electromagnetic method (FDEM), one of the electromagnetic methods, has advantages due to its nondestructive measurement nature and also its simple operation. In this study, we used a newly developed FDEM survey apparatus to examine its applicability in the exploration of landslide. The results showed good consistency with the structure of the landslide mass, which had been indentified by many other apporaches during the passing decades. Therefore, we concluded that FDEM is an effective method in exploring the area and also the inner structure of landsliding mass.