空中電磁探査による比抵抗の分布に着目した深層崩壊危険斜面の抽出技術の開発

抄録

In steep mountainous regions, deep-seated landslides sometimes occur. These landslides often trigger debris flow and sometimes induce landslide dam. Previous studies tried to extract potential slopes of deep-seated landslide with topographical, geological surveys, and hydrological observation. Especially geological surveys and hydrological observations were carried out for estimating underground structure. But these methods take a lot of time and labor, for example field survey for spring spots. Then we tried to develop the method to extract the potential slopes of deep-seated landslides with air-borne electromagnetic survey. We compared resistivity by air-borne electromagnetic survey to core boring for ascertaining utility of air-borne electromagnetic survey, and applied to the result to other slopes. The result shows that the spatial variation of resistivity, such as the change of resistivity in vertical direction, can indicate the status of bedrock.