| Project/Area Number |
09680176
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
自然地理学
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| Research Institution | Osaka kyoiku University |
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Principal Investigator |
ISHII Takayuki Osaka Kyoiku University, Faculty of Education, Professor, 教育学部, 教授 (40045159)
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| Co-Investigator(Kenkyū-buntansha) |
HIRANO Masahige Osaka City University, Department of geography, Professor, 文学部, 教授 (00047177)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1998: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1997: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Rokko mountains / topographic change / Hyogokenn-nanb earthquake / horizontal acceleration / debris slope / fissure across redge / 岩屑斜面 / 屋根を横切る地割 / 尾根を横切る地割れ / 水平加速度 |
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| Research Abstract |
The report aids to evaluate the equivalent horizontal acceleration and to make clear topographic changes at the Rokko mountains induced by the 1995 Hyogoken-nanbu earthquake, The results obtained shows that several spots of the mountains had 1 g(g=garvitational acceleration) or more of the equivalent horizontal acceleration, which evaluated by means of the displaced stones and tombstones. This value is abnormally higher than that reported. This may be thought to suggest topographic effect. From a view point of debris production, the topographic changes by the earthquake have introduced to debris supply on the mountain slope to build up talus slopes and clitter slopes, On the other hand, the earthquake induced to peculiar fissures across ridge, which was recognized at three sites of the mountains where suggested the strong acceleration of 1 or more. Examination of the acted direction of the acceleration leads to a conclusion that the fissures across ridge may be attributed to be tectonic in origin induced by the earthquake.
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