| Autor: |
ARAI, Noriyuki, CHIGIRA, Masahiro |
| Jazyk: |
japonština |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
京都大学防災研究所年報. B. 58:95-101 |
| ISSN: |
0386-412X |
| Popis: |
2011 Typhoon Talas induced a large numbers of rain-induced rock avalanches in the Kii Peninsula, where is underlain by Jurassic-lower Miocene accretion complexes. We performed geological investigation in the Akatani area, where two huge rock avalanches with volumes of 2 million and 8 million m3 occurred, and we found that these two rock avalanches had their sliding surfaces along a large-scale low-angle thrust-fault extending more than 5 km. This fault had been exposed at riversides by long-term river incision and overlying dip slopes had started to deform and finally failed catastrophically, being triggered by the heavy rainstorm. This finding suggests that locating a large-scale low-angle thrust fault is essentially important to predict potential sites of rock avalanche as well as finding a gravitational slope deformation using high-resolution DEMs. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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