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A novel method of surveying submerged landslide ruins: Case study of the Nebukawa landslide in Japan
https://kitami-it.repo.nii.ac.jp/records/7736
https://kitami-it.repo.nii.ac.jp/records/77368eeb6b32-9691-403d-9d12-c6963b032124
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
リポジトリ山崎・釜井.pdf (4.9 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-05-14 | |||||
| タイトル | ||||||
| タイトル | A novel method of surveying submerged landslide ruins: Case study of the Nebukawa landslide in Japan | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Acoustic survey | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Coefficient of frictions | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Fish finders | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 著者 |
Yamasaki, Shintaro
× Yamasaki, Shintaro× Kamai, Toshitaka |
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| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 39714 | |||||
| 姓名 | 山崎, 新太郎 | |||||
| 言語 | ja | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We investigated submerged ruins from the 1923 Nebukawa landslide, which was caused by the 1923 Kanto earthquake. The on-land areas affected by the landslide have been restored and evidence of the landslide is mostly gone, but huge structures that appear to be man-made have been observed by divers on the seafloor near the area of the landslide. We used a fish finder designed for leisure use and other low-cost equipment to conduct a marine acoustic survey. Because the affected area off Nebukawa is close to shore and shallow and the tools were sufficiently lightweight, we were able to use an inflatable raft for the survey. We created a bathymetric map and side-scan images showing features of the landslide mass and scattered huge structures exposed on the seafloor. After the acoustic investigations, we conducted a diving investigation and were able to ascertain that the structures were made of concrete and were most likely parts of the old Nebukawa station. The ruins were displaced about 260 to 320. m horizontally from the original station location (to 110-170. m offshore) and were mixed with coarse rock fragments from the landslide mass. The distribution of bottom materials suggests that the landslide struck the seafloor and then traveled as far as 460. m offshore from the coastline. The landslide had an equivalent coefficient of friction (H/L) of about 0.15, indicating high mobility. The landslide probably transformed into a turbulent flow mixed with basal sandy sediments, which propelled the debris farther offshore | |||||
| 書誌情報 |
Engineering Geology 巻 186, p. 28-33, 発行日 2015-02 |
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| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | http://doi.org/10.1016/j.enggeo.2014.11.010 | |||||
| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| 著者版フラグ | ||||||
| 値 | author | |||||
| 出版タイプ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
