Statistical modeling of landslide hazard using GIS

Gorsevski P.V.; Foltz, R.B.; Gessler, P.E.; Cundy, T.W. 2001. Statistical Modeling of Landslide Hazard Using GIS. Seventh Federal Interagency Sedimentation Conference: Silver Legacy, March 25-29, 2001, Reno, Nevada. 7 p.

Keywords: landslides, hazards, models, geographical information systems (GIS)

Links: PDF {224 KB -- USFS]| PDF [225K uidaho.edu]

Abstract: A model for spatial prediction of landslide hazard is applied to an experimental basin affected by landslide events that occurred during the winter of 1995-96, following heavy rains, snowmelt, and high river flow. High-resolution digital elevation data with 75 ft x 75 ft resolution were used for deriving the topographic attributes used for the modeling. The model is based on multivariate methods and assumes that the factors which caused the failure in the past, would cause a failure in the future under similar conditions. This model is intended for predicting future slope failure when managing forestlands where the major concern is associated with the cumulative effects on the entire watershed, such as decreased water quality, loss of spawning habitat and organic matter, flowing debris during peak flows, and decision support for road maintenance, obliteration, and development of new roads. This type of model allows rapid assessment of spatial correlation of the topographic attributes on large areas. The final product of the modeled prediction would delineate areas with high probabilities of failure in the basin. At the end the modeled prediction is compared with the observed landslide locations to test the strength of the model.

Moscow FSL publication no. 2001p