Susceptibility assessments of the Wenchuan earthquake-triggered landslides in Longnan using logistic regression

Autor(en)

S.B. Bai, J. Wang, B. Thiebes, C. Cheng, Z.Y. Chang

Abstrakt

In this study a Wenchuan earthquake-induced landslide susceptibility assessment was carried out in the Longnan area in northwestern China using a GIS-based logistic regression model. This region has frequently been affected by landslides in the past, and was intensively affected by the 5.12 Wenchuan earthquake which received considerable international attention. The data used for this study consist of the landslides triggered by the Wenchuan earthquake and a landslide pre-disposing factor database. Information regarding the landslide causative factors came from additional data sources, such as a digital elevation model (DEM) with a 30 × 30 m resolution, orthophotos, geological and land-use maps, precipitation records, and information on peak ground acceleration data from the 2008 earthquake. The statistical analysis of the relationship between the Wenchuan earthquake-triggered landslides and pre-disposing factors showed the great influence of lithological and topographical conditions on slope failures. The quality of susceptibility mapping was validated by splitting the study area into training and validation sections. The prediction capability analysis demonstrated that the landslide susceptibility map could be used for land planning as well as emergency planning by local authorities.

Organisation(en)

Institut für Geographie und Regionalforschung

Externe Organisation(en)

Nanjing Normal University

Journal

Environmental Earth Sciences

Seiten

1-13

Anzahl der Seiten

13

ISSN

1866-6280

DOI

https://doi.org/10.1007/s12665-013-2475-z

Publikationsdatum

01-2013

Peer-reviewed

Ja

ÖFOS 2012

507013 Regionale Geographie

Sustainable Development Goals

SDG 15 – Leben an Land

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/3d970c98-bf3c-48d7-8482-f364a180e100