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Modeling typhoon- and earthquake-induced landslides in a mountainous watershed using logistic regression
- Source :
-
Geomorphology . Sep2007, Vol. 89 Issue 3/4, p335-347. 13p. - Publication Year :
- 2007
-
Abstract
- Abstract: Landslides can be caused by storms and earthquakes. Most logistic regression models proposed in recent years have been targeted at rainfall-induced landslides. In areas such as Taiwan, where landslides can be triggered by typhoons (tropical cyclones) and earthquakes, a rainfall-induced model is insufficient because it provides only a partial explanation of landslide occurrence and overlooks the potential effect of earthquakes on typhoon-triggered landslides. This study used landslides triggered by a major earthquake and a typhoon prior to the earthquake to develop an earthquake-induced model and a typhoon-induced model. The models were then validated by using landslides triggered by three typhoons after the earthquake. According to the results, typhoon-triggered landslides tended to be near stream channels and earthquake-triggered landslides were more likely to be near ridge lines. Moreover, a major earthquake could still affect the locations of typhoon-triggered landslides 6 years after the earthquake. This study therefore demonstrates that an earthquake-induced model both sheds light on the environmental factors for triggering landslides, and augments a rainfall-induced model in its predictive capability in areas such as Taiwan. [Copyright &y& Elsevier]
- Subjects :
- *LANDSLIDES
*WATERSHEDS
*LOGISTIC regression analysis
Subjects
Details
- Language :
- English
- ISSN :
- 0169555X
- Volume :
- 89
- Issue :
- 3/4
- Database :
- Academic Search Index
- Journal :
- Geomorphology
- Publication Type :
- Academic Journal
- Accession number :
- 25825843
- Full Text :
- https://doi.org/10.1016/j.geomorph.2006.12.011