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| Titel |
Application of simulation technique on debris flow hazard zone delineation: a case study in the Daniao tribe, Eastern Taiwan |
| VerfasserIn |
M. P. Tsai, Y. C. Hsu, H. C. Li, H. M. Shu, K. F. Liu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 11 ; Nr. 11, no. 11 (2011-11-18), S.3053-3062 |
| Datensatznummer |
250009788
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| Publikation (Nr.) |
 copernicus.org/nhess-11-3053-2011.pdf |
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| Zusammenfassung |
| Typhoon Morakot struck Taiwan in August 2009 and induced considerable
disasters, including large-scale landslides and debris flows. One of these
debris flows was experienced by the Daniao tribe in Taitung, Eastern Taiwan.
The volume was in excess of 500 000 m3, which was substantially larger
than the original design mitigation capacity. This study considered
large-scale debris flow simulations in various volumes at the same area by
using the DEBRIS-2D numerical program. The program uses the generalized
Julien and Lan (1991) rheological model to simulate debris flows. In this
paper, the sensitivity factor considered on the debris flow spreading is the
amount of the debris flow initial volume. These simulated results in various
amounts of debris flow initial volume demonstrated that maximal depths of
debris flows were almost deposited in the same area, and also revealed that
a 20% variation in estimating the amount of total volume at this
particular site results in a 2.75% variation on the final front
position. Because of the limited watershed terrain, the hazard zones of
debris flows were not expanded. Therefore, the amount of the debris flow
initial volume was not sensitive. |
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