2007 Fiscal Year Final Research Report Summary
The formation of causative factors and the prediction of outbreak for repeated landslides on the same slope
| Project/Area Number |
16380098
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
林学・森林工学
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| Research Institution | Niigata University |
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Principal Investigator |
KAWABE Hiroshi Niigata University, Institute of Science and Technology, Prof. (80126036)
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| Co-Investigator(Kenkyū-buntansha) |
GONDA Yutaka Niigata Univ., Institute of Science and Technology, Associate prof. (10303116)
HAYASHI Setsuo Mie Univ., Fac. of Bioresources, Prof. (50024584)
NUMAMOTO Shinya Mie Univ., Fac. of Bioresources, Associate prof. (60324555)
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| Project Period (FY) |
2004 – 2007
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| Keywords | Landslide / Observation and prediction of natural phenomena / Stress release / Gravitational creep / Buckling / Salt weathering / International information exchange / Taiwan |
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| Research Abstract |
Changes in geographical features of a slope after failure and re-instabilization of the slope by those were investigated for two large-scale landslides -- the Chiu-fen-erh-shan and the Tsaoling -- triggered by the Chi-Chi earthquake in 1999 in Taiwan. Furthermore, the mid Niigata prefecture earthquake and the Noto-Hantou earthquake which occurred during the term of this project were targeted for this study, too.
1. For the Tsaoling landslide which has the record of landslides in the past 150 years, the clear correlation between estimated maximum acceleration and occurrence of landslide wasn't admitted. The occurrence of landslide can't be explained only by earthquake, that is, the influence of causative factors is suggested.
2. Trial calculations by a simple model show that there is a possibility of buckling fold by gravitational creep and the position of buckling fold is on the lower part of slope.
3. The buckling fold and erosion on the lower slope of both the landslides progress year a
… More
fter year. The GPS survey at the Tsaoling landslide showed the horizontal displacement of about 5cm/year on the central part of slope and 1cm/year on the lower part of slope and the upheaval of 1-2cm/year. The slope is instabilizing gradually.
4. Simple seismic exploration was carried out to investigate decrease in the ground strength by stress release. The tendency that an elastic wave speed was decreasing at the rate of 400-600m/s a year was found.
5. The distribution of landslides caused by the mid Niigata prefecture earthquake was analyzed by GIS. The area rate of landslides which appeared in the landslide topography was 5.26% and that on the non-landslide topography was 0.16%. This result shows that the occurrence of landslide by an earthquake is strongly controlled by the history of the ground and a landslide by an earthquake doesn't happen easily in a slope where a landslide hasn't occurred yet. This phenomenon is thought to concern the re-instabilization of a slope from which upper load is removed Less
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Research Products
(42 results)
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[Journal Article] Sediment related disasters triggered by the Noto-Hantou Earthquake on March 25, 20072007
Author(s)
Setsuo, HAYASHI, Kanji, KONDO, Hiroshi, KAWABE, Masaaki, HANAOKA, Kazuya, AKIYAMA, Shinya, NUMAMOTO, Shigeru, SUZUKI, Keiji, MUKAI, Mutsutoshi, FUKUDA
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Journal Title
J. of the Jpn. Soc. of Erosion Control Engineering 60-2
Pages: 51-58
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Topographical changes due to heavy rainfall in the Chiu-fen-erh-shan landslide triggered by the Chi-Chi earthquake in Taiwan2006
Author(s)
Kanji, KONDO, Setsuo, HAYASHI, Shinya, NUMAMOTO, Hiroshi, KAWABE, Yutaka, GONDA, Masahiro, KMBORI, Wen-Neng, WANG
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Journal Title
Disaster Mitigation of Debris Flows, Slope Failures and Landslides 1
Pages: 13-24
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] The sediment-related disasters caused by the mid Niigata prefecture earthquake in 20042005
Author(s)
Hiroshi, KAWABE, Yutaka, GONDA, Hideaki, MARUI, Naoki, WATANABE, Satoshi, TSUCHIYA, Hikaru, KITAHARA, Nobutomo, OSANAI, Katsuo, SASAHARA, Yoshimitsu, NAKAMURA, Kimio, INOUE, Kiichiro, OGAWA, Satoshi, ONODA
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Journal Title
J. of the Jpn. Soc. of Erosion Control Engineering 57-5
Pages: 39-46
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Sediment disasters caused by the Mid Niigata Prefecture Earthquake and changes of sediment movement after snow melt2005
Author(s)
Hiroshi, KAWABE, Yutaka, GONDA, Hideaki, MARUI, Naoki, WATANABE, Satoshi, TSUCHIYA, Nobutomo, OSANAI, Taro, UCHIDA, Jun'ichi, KURIHARA, Yoshimitsu, NAKAMURA, Kimio, INOUE, Kiichiro, OGAWA, Satoshi, ONODA
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Journal Title
J. of the Jpn. Soc. of Erosion Control Engineering 58-3
Pages: 44-50
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Topographical features of landslides caused by earthquake in 1999 and rainfalls in 2001 in Taiwan2005
Author(s)
Kanji, KONDO, Setsuo, HAYASHI, Shinya, NUMAMOTO, Hiromitsu, ISHIBASHI, Hiroshi, KAWABE, Satoshi, TSUCHIYA, Wen-Neng, WANG
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Journal Title
Proc. of Int. Symp. on Landslide Hazard in Orogenic Zone from the Himalaya to Island Arc in Asia
Pages: 93-103
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Analysis of slope failures caused by the Chi-Chi earthquake in 1999 using air photographs2004
Author(s)
Setsuo, HAYASHI, Yoshinobu, UMEMURA, Hiromitsu, ISHIBASHI, Satoshi, TSUCHIYA, Kanji, KONDO, Shinya, NUMAMOTO, Takashi, JITOUSONO, Wen-Neng, WANG, Hiroshi, KAWABE
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Journal Title
Proc. of Symp. on geological disasters in mountainous areas
Pages: E1-E23
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Secular changes of elastic wave velocity on the slip slides after the Chi-Chi earthquake in Taiwan2007
Author(s)
Shinya, NUMAMOTO, Setsuo, HAYASHI, Kanji, KONDO, Hiroshi, KAWABE, Yutaka, GONDA, Wen-Neng, WANG
Organizer
Annual Meeting of Jpn. Soc. of Erosion Control Engineering
Place of Presentation
Fukui
Year and Date
2007-05-23
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Debris disasters caused by local heavy rainfall in Niigata area in July 20042005
Author(s)
Yutaka, GONDA, Hiroshi, KAWABE, Hideaki, MARUI, Naoki, WATANABE, Michiya, IRASAWA, Katsuo, SASAHARA, Yoshimitsu, NAKAMURA, Yuji, YASUDA
Organizer
Annual Meeting of Jpn. Soc. of Erosion Control Engineering
Place of Presentation
Nagoya
Year and Date
2005-05-25
Description
「研究成果報告書概要(欧文)」より
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[Presentation] The sediment-related disasters caused by the mid Niigata prefecture earthquake in 20042005
Author(s)
Hiroshi, KAWABE, Yutaka, GONDA, Hideaki, MARUI, Naoki, WATANABE, Satoshi, TSUCHIYA, Hikaru, KITAHARA, Nobutomo, OSANAI, Katsuo, SASAHARA, Yoshimitsu, NAKAMURA, Kimio, INOUE, Kiichiro, OGAWA, Satoshi, ONODA
Organizer
Annual Meeting of Jpn. Soc. of Erosion Control Engineering
Place of Presentation
Nagoya
Year and Date
2005-05-25
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Sediment-related disasters in Yamakoshi Village caused by the mid Niigata Prefecture earthquake2004
Author(s)
Naoki, WATANABE, Hideaki, MARUI, Hiroshi, KAWABE, Yutaka, GONDA, Hiromitsu, YAMAGISHIm, Kazunari, INABA
Organizer
Symp. on Damages due to the Mid Niigata Prefecture Earthquake, Jpn. Assoc. for Earthquake Engineering
Place of Presentation
Tokyo
Year and Date
2004-12-25
Description
「研究成果報告書概要(欧文)」より
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