Application of simulation technique on debris flow hazard zone delineation: a case study in the Daniao tribe, Eastern Taiwan
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 m<sup>3</sup>,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2011-11-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | http://www.nat-hazards-earth-syst-sci.net/11/3053/2011/nhess-11-3053-2011.pdf |
| _version_ | 1818340701182623744 |
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| author | M. P. Tsai Y. C. Hsu H. C. Li H. M. Shu K. F. Liu |
| author_facet | M. P. Tsai Y. C. Hsu H. C. Li H. M. Shu K. F. Liu |
| author_sort | M. P. Tsai |
| collection | DOAJ |
| description | 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 m<sup>3</sup>, 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. |
| first_indexed | 2024-12-13T15:47:05Z |
| format | Article |
| id | doaj.art-6428ed06712c42df9c8af77544c0dfff |
| institution | Directory Open Access Journal |
| issn | 1561-8633 1684-9981 |
| language | English |
| last_indexed | 2024-12-13T15:47:05Z |
| publishDate | 2011-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Natural Hazards and Earth System Sciences |
| spelling | doaj.art-6428ed06712c42df9c8af77544c0dfff2022-12-21T23:39:39ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812011-11-0111113053306210.5194/nhess-11-3053-2011Application of simulation technique on debris flow hazard zone delineation: a case study in the Daniao tribe, Eastern TaiwanM. P. TsaiY. C. HsuH. C. LiH. M. ShuK. F. LiuTyphoon 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 m<sup>3</sup>, 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.http://www.nat-hazards-earth-syst-sci.net/11/3053/2011/nhess-11-3053-2011.pdf |
| spellingShingle | M. P. Tsai Y. C. Hsu H. C. Li H. M. Shu K. F. Liu Application of simulation technique on debris flow hazard zone delineation: a case study in the Daniao tribe, Eastern Taiwan Natural Hazards and Earth System Sciences |
| title | Application of simulation technique on debris flow hazard zone delineation: a case study in the Daniao tribe, Eastern Taiwan |
| title_full | Application of simulation technique on debris flow hazard zone delineation: a case study in the Daniao tribe, Eastern Taiwan |
| title_fullStr | Application of simulation technique on debris flow hazard zone delineation: a case study in the Daniao tribe, Eastern Taiwan |
| title_full_unstemmed | Application of simulation technique on debris flow hazard zone delineation: a case study in the Daniao tribe, Eastern Taiwan |
| title_short | Application of simulation technique on debris flow hazard zone delineation: a case study in the Daniao tribe, Eastern Taiwan |
| title_sort | application of simulation technique on debris flow hazard zone delineation a case study in the daniao tribe eastern taiwan |
| url | http://www.nat-hazards-earth-syst-sci.net/11/3053/2011/nhess-11-3053-2011.pdf |
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