地すべり地における断層と地下水の調査 : 房総半島の第三紀層地すべり地帯の電気探査例  [in Japanese] The Relation between Faults and Groundwater in a Landslide Zone : A Consideration on the Electrical Prospecting carried out in the Tertiary Landslide Zone of the Boso Peninsula  [in Japanese]

It is well-known that the landslides occurred in many place, province extend of Tertiary system in the southern part of the Boso Peninsula. In the case of the Yamana landslide, their blocks are formed on the faults, and the groundwater is dammed up by these faults which formed surfaces of discontinuity. It seemed that the landslides occurred by ground water to flow into these zone from backside of the faults in the case of rainfall. The point of aimed at mechanism analysis of landslides, is to confirm the point of the faults and the trend of the ground-water. By drawing the apparent resistivity contour map and by making use of analysis of electrical prospecting, we could find out its contour anomaly, and make clear the relation between the faults and the groundwater. And we could select the effetive subsurface draingame control way at slope remedial measures.