| Presentation | 2019-11-22 Characteristics of changes in strain inside a landslide detected by annual measurement with TW-COTDR Tetsuya Kogure, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Strain changes were measured in a landslide mass in Shimane, Japan from March 2018 to March 2019 via TW-COTDR with time interval of 6 hours. A 364 m-long fiber optic cable was fixed in: (1) a 16 m-deep borehole and (2) 30 cm-deep channels parallel to landslide surface. Results from the borehole showed that strain changes in shallower zone (near the surface) were sensitive to rainfall events and that those around the slip surface, which locates at 8 m below the landslide surface, were less sensitive to precipitations although strain continuously increased to reach the maximum strain change of ca. 750 me. Strain changes parallel to the slope showed unclear relationship with precipitations in some regions, and the values also vary with location. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | TW-COTDR / Landslides / Strain change |
| Paper # | OFT2019-44 |
| Date of Issue | 2019-11-15 (OFT) |
| Conference Information | |
| Committee | OCS / ITE-BCT / OFT / IEE-CMN |
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| Conference Date | 2019/11/21(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kaikyo-Messe-Shimonoseki |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Joji Maeda(Tokyo Univ. of Science) / Kyoichi Saito(NHK) / Fumihiko Ito(Shimane Univ.) / Shun Morimura(CRIEPI) |
| Vice Chair | / / / Kouji Hirata(Kansai Univ) |
| Secretary | (NTT) / (Furukawa Electric) / (NHK) / Kouji Hirata(NTV) |
| Assistant | / Hiroyuki Hamazumi(TOKYO KOSEN) / Naoki Maeda(Sumitomo Electric) / Takumi Matsumoto(Furukawa Electric) / Hajime Saito(TV Tokyo) / Hajime Arao(Sumitomo Electric) / Hiroshi Watanabe(NTT) / Yuuichi Shinohara(TEPCO Power Grid) / Akihiro Tanaka(CRIEPI) |
| Paper Information | |
| Registration To | Technical Committee on Optical Communication Systems / Technical Group on Broadcasting and Communication Technologies / Technical Committee on Optical Fiber Technology / Technical Meeting on Communications |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Characteristics of changes in strain inside a landslide detected by annual measurement with TW-COTDR |
| Sub Title (in English) | |
| Keyword(1) | TW-COTDR |
| Keyword(2) | Landslides |
| Keyword(3) | Strain change |
| 1st Author's Name | Tetsuya Kogure |
| 1st Author's Affiliation | Shimane University(Shimane Univ.) |
| Date | 2019-11-22 |
| Paper # | OFT2019-44 |
| Volume (vol) | vol.119 |
| Number (no) | OFT-301 |
| Page | pp.pp.43-48(OFT), |
| #Pages | 6 |
| Date of Issue | 2019-11-15 (OFT) |