破砕帯地すべり地の電気探査にいって(補逸)

Abstract

The electric prospecting was conducted through the vertical sounding, based on the electricresistivity methods which consist of three-electrode, four-electrode and Schiumberger methods.The results are summarized as follows.1) The results of vertical sounding are unable to discriminate of the geology composed of baserock and detrital material layer in the shattered zone type landslide area.2) The relationship between the ground water level and the resistivity value are not recog-nized obviously.3) Landslide surface is detected by internal strain-meter in several depth and also electric dis-continuity layer is divided into several layers composed of different resistivity values. Accor-dingly, it seems that the discussion of the relationship between discontinuity of electric resistivityand landslide surface is meaningless.4) The influence of rainfalls is not clearly shown to the resistivity values of grounding elec-trode.