Abstract: The high density resistivity imaging is a geophysical survey method, based on the difference of rock masses or soil masses in electric properties. Its basic principles and system structure are introduced. In the light of an instance which measures the gliding mass depth and the bedrock surface shape of a landslide in the Three Gorges Reservoir area with the high density resistivity method, the applicable conditions and the fieldwork technique of the high density resistivity method, are discussed, and the resistivity distribution section images are interpreted combining borehole logs and engineering geological surveying data. It suggests that the high density resistivity method is an efficient survey method if it is combined with the conventional survey methods. And the geological resistivity distribution images generated by the self-contained data processing software are direct and distinct, and its qualitative and quantitative interpretation is reliable. The inferred parameters of the landslide accord with the reality. It is confirmed that the high density resistivity method is suitable for landslide survey very much when it is combined with other methods.

Key words: high density resistivity method, landslide survey, resistivity image interpretation