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- Title
Identification of Susceptible Rainfall-Induced Landslide Areas Based on Field Experiments and Multi-criteria Analysis in GIS Environment: A Proposal for Non-inventoried Areas.
- Authors
Assis, Leonardo C.; Calijuri, Maria L.; Salvador, Mateus M.; Castro, Jackeline de S.; Carvalho, Carolina F.
- Abstract
The objective of this study is to present a method for identifying zones susceptible to rainfall-induced landslides, based on field experiments in combination with strategic decision analysis through multi-criteria evaluation to obtain landslide susceptibility maps for areas where no landslide inventory maps are available. Field experiments were conducted to characterize runoff and water infiltration in different conditions of soil, land cover, and slope, as the occurrence of a combination of these factors is correlated with mass movements. An empirical model was used to transform at-site runoff information to a runoff map (spatial form). Spatial patterns were then utilized in a multi-criteria evaluation procedure, resulting in a digital model showing very low, low, moderate, high, and very high landslide susceptibility zones. Areas of high and very high landslide susceptibility corresponded to 17.6% and 8.6% of all areas classified as being at risk, respectively. Together, these classes accounted for 8% of approximately 6600 km2. We conclude that the use of this methodology allowed the identification of landslides induced by rainfall, and due to the nature of experimental-empirical modelling, we recommend that this method is replicated for other conditions.
- Subjects
LANDSLIDES; SEEPAGE; LAND cover; DECISION making; RUNOFF; IDENTIFICATION
- Publication
Geotechnical & Geological Engineering, 2019, Vol 37, Issue 5, p4473
- ISSN
0960-3182
- Publication type
Article
- DOI
10.1007/s10706-019-00922-0