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| Titel |
Incorporating the effects of topographic amplification in the analysis of earthquake-induced landslide hazards using logistic regression |
| VerfasserIn |
S. T. Lee, T. T. Yu, W. F. Peng, C. L. Wang |
| 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 ; 10, no. 12 ; Nr. 10, no. 12 (2010-12-03), S.2475-2488 |
| Datensatznummer |
250008528
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| Publikation (Nr.) |
 copernicus.org/nhess-10-2475-2010.pdf |
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| Zusammenfassung |
| Seismic-induced landslide hazards are studied using seismic shaking intensity
based on the topographic amplification effect. The estimation of the
topographic effect includes the theoretical topographic amplification factors
and the corresponding amplified ground motion. Digital elevation models (DEM)
with a 5-m grid space are used. The logistic regression model and the
geographic information system (GIS) are used to perform the seismic landslide
hazard analysis. The 99 Peaks area, located 3 km away from the ruptured fault
of the Chi-Chi earthquake, is used to test the proposed hypothesis. An
inventory map of earthquake-triggered landslides is used to produce a
dependent variable that takes a value of 0 (no landslides) or 1 (landslides).
A set of independent parameters, including lithology, elevation, slope
gradient, slope aspect, terrain roughness, land use, and Arias intensity
(Ia) with the topographic effect. Subsequently, logistic regression is
used to find the best fitting function to describe the relationship between
the occurrence and absence of landslides within an individual grid cell. The
results of seismic landslide hazard analysis that includes the topographic
effect (AUROC = 0.890) are better than those of the analysis without it
(AUROC = 0.874). |
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