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| Titel |
On the influence of temporal change on the validity of landslide susceptibility maps |
| VerfasserIn |
K. Meusburger, C. Alewell |
| 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 ; 9, no. 4 ; Nr. 9, no. 4 (2009-08-28), S.1495-1507 |
| Datensatznummer |
250006910
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| Publikation (Nr.) |
 copernicus.org/nhess-9-1495-2009.pdf |
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| Zusammenfassung |
| The consideration of non-stationary landslide causal factors in statistical
landslide susceptibility assessments is still problematic. The latter may
lead to erroneous model predictions, especially in times of dramatic
environmental change. In this case study in the Central Swiss Alps, we aim to
evaluate the effect of dynamic change of landslide causal factors on the
validity of landslide susceptibility maps. Logistic regression models were
produced for two points in time, 1959 and 2000. Both models could correctly
classify >70% of the independent spatial validation dataset. By
subtracting the 1959 susceptibility map from the 2000 susceptibility map a
deviation susceptibility map was obtained. Our interpretation was that these
susceptibility deviations indicate the effect of the change of dynamic causal
factors on the landslide probability. The deviation map explained 85% of new
landslides occurring after 2000. We believe it to be a suitable tool to add a
time element to the susceptibility map pointing to areas with changing
susceptibility due to recently changing environmental conditions. |
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