| Project/Area Number |
05404076
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Natural disaster science
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
SASSA Kyoji Landslide Section, Disaster Prevention Research Institute (DPRI), KYOTO UNIVERSITY Professor, 防災研究所, 教授 (30086061)
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| Co-Investigator(Kenkyū-buntansha) |
SOKOBIKI Hirotaka Faculty of Technology Hiroshima University Associate Professor, 工学部, 助教授 (40243589)
SUEMINE Akira Landslide Section DPRI,KYOTO UNIVERSITY Associate Professor, 防災研究所, 助教授 (00109092)
HIRAHARA Kazuro Earthquake Prediction Ros.Center D.P.R.I., KYOTO UNIVERSITY Associate Professor, 防災研究所, 助教授 (40165197)
FUKUOKA Hiroshi Tokushima Landslide obs., DPRI,KYOTO UNIVERSITY,Research Associste, 防災研究所, 助手 (40252522)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥26,100,000 (Direct Cost: ¥26,100,000)
Fiscal Year 1994: ¥9,600,000 (Direct Cost: ¥9,600,000)
Fiscal Year 1993: ¥16,500,000 (Direct Cost: ¥16,500,000)
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| Keywords | Landslide / Slope Failure / Satellite Survey / GPS / Hazard Map / 人工衛星計量 / GPS |
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| Research Abstract |
Twelve observing points and benchmarks are settled in and around the Taguchi landslide, Okayama Prefecture. Landslide movement of about 2cm a year had been observed by borehole inclinometer in the lower part of thie landslide, however, the middle and upper part of this landslide had not been investigated. In order to recognize sliding slopes and to depict the boundary of landsliding blocks, static GPS surveys were carried out four times in a year. Small amount of landslide movement was detected at the middle part, but no obvious movement was detected by these surveys. No more than 2 cm per a year of movement was detected at the lower part of this landslide was detected, and it coincides with the borehole inclinometer monitoring. More than 5 cm of movement was detected at a point on a new road embankment and it showed failure of the embankment was possible. Municipal government decided to reinforce the embankment from this survey result.
As a result, GPS survey was proved to have ability to detect landslide movement of greater than 5 mm. It is enough precision for the purpose of monitoring and identification of landslide slopes, although stable benchmark should be chosen carefully.
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