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| Titel |
TheÂforecasting and calibration ofÂwide-areaÂdebris slideÂin Taiwan |
| VerfasserIn |
Ching-Fang Lee, Lun-Wei Wei, Chuen-Ming Huang, Wei-Kai Huang, Chin-Tung Cheng, Chung-Chi Chi, Hsi-Hung Lin |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250103731
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| Publikation (Nr.) |
 EGU/EGU2015-3142.pdf |
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| Zusammenfassung |
| Catastrophic landslides and debris slides triggered by intense typhoons such as Typhoon
Morakot (2009) occurred more frequently in the recent years, and caused many casualties and
economic loss in Taiwan. For the purpose of reducing the damage resulted from
geological hazards, this study collects multiple periodÂlandslide inventories which
contain the information of occurrence time, location, magnitude, rainfall intensity,
accumulated rainfall and attempts to establish the rainfall threshold for shallow
landslides.
This study considers the concept of hazard matrix which combining the magnitude
(landslide ratio of slope units) and the possibility of occurrence (historical disaster records) to
set up the warning thresholds. The critical rainfall thresholds are build up according to the
R24 (24 hours accumulated rainfall) and I3 (3 hourly mean rainfall intensity) of
historical records. The validation result shows the model can predict the possible
hazard in 2~9 hours before occurrence of landslides. The web-GIS early-warning
system is also developed to connect the real-time rainfall data and evaluate the
warning signal immediately for disaster prevention and increasing the response time. |
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