| 講演要旨(和文) | | 近年，ドローン用いた空中電磁探査が開発された．本稿ではドローン空中電磁探査の地すべり調査への適用を検証するために，和歌山県田辺市の地すべり変状が確認されている地区においてドローン空中電磁探査を実施した．調査に使用した方法はD-GREATEMである．この方法は，大地にバイポール送信源を設置し，ドローンに受信機を搭載して空中で電磁波を測定する．大地の比抵抗構造は，その電磁波の応答からが計算される．本研究では，D-GREATEMによって解析された比抵抗構造を既存の地質データと比較して，ドローン空中電磁探査の地すべり調査への適用について考察した．その結果，地すべり調査にドローン空中電磁探査を用いることにより，調査地区の比抵抗構造を迅速に3次元で得ることができた．そして，その比抵抗構造と従来の地質調査の方法で確認されていた地すべりブロックは整合することを確認した． |
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| | 講演要旨(英文) | | In recent years, an airborne electromagnetic (AEM) system using a drone was developed. This paper aims at verifying the application of drones to the land-slide survey, the drone airborne electromagnetic exploration was performed at a field in which some landslide deformations have been confirmed in Tanabe city of Wakayama prefecture. D-GREATEM is a method used for verification. In this method, a bipole-source is set-up on the ground, a receiver is attached to the drone which is able to measure the electromagnetic wave in midair. The resistivity structure of the ground is calculated by the response of electromagnetic waves. In this study, we have compared existing geological data and the resistivity structure which were analyzed by the D-GREATEM and considered applying for a landslide survey. Our results revealed that using a drone airborne electromagnetic exploration is able to show the resistivity structure of the survey area in 3D rapidly. Moreover, it was confirmed that the resistivity structure and the landslide blocks which were confirmed by the conventional survey method had a good consistency. |
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