Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.3390/geohazards2040021
Lizenz creative commons licence
Titel (primär) The relevance of geotechnical-unit characterization for landslide-susceptibility mapping with SHALSTAB
Autor Moreiro Melo, C.; Kobiyama, M.; Michel, G.P.; de Brito, M.M.
Quelle GeoHazards
Erscheinungsjahr 2021
Department SUSOZ
Band/Volume 2
Heft 4
Seite von 383
Seite bis 397
Sprache englisch
Topic T5 Future Landscapes
Keywords geotechnical unit; detective performance index of unstable areas; model performance; SHALSTAB; landslide hazard
Abstract Given the increasing occurrence of landslides worldwide, the improvement of predictive models for landslide mapping is needed. Despite the influence of geotechnical parameters on SHALSTAB model outputs, there is a lack of research on models’ performance when considering different variables. In particular, the role of geotechnical units (i.e., areas with common soil and lithology) is understudied. Indeed, the original SHALSTAB model considers that the whole basin has homogeneous soil. This can lead to the under-or-overestimation of landslide hazards. Therefore, in this study, we aimed to investigate the advantages of incorporating geotechnical units as a variable in contrast to the original model. By using locally sampled geotechnical data, 13 slope-instability scenarios were simulated for the Jaguar creek basin, Brazil. This allowed us to verify the sensitivity of the model to different input variables and assumptions. To evaluate the model performance, we used the Success Index, Error Index, ROC curve, and a new performance index: the Detective Performance Index of Unstable Areas. The best model performance was obtained in the scenario with discretized geotechnical units’ values and the largest sample size. Results indicate the importance of properly characterizing the geotechnical units when using SHALSTAB. Hence, future applications should consider this to improve models’ predictivity.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=25383
Moreiro Melo, C., Kobiyama, M., Michel, G.P., de Brito, M.M. (2021):
The relevance of geotechnical-unit characterization for landslide-susceptibility mapping with SHALSTAB
GeoHazards 2 (4), 383 - 397 10.3390/geohazards2040021