Digital Data 2016-0044

Digital Data 2016-0044

DIG 2016-0044

Relative Landslide Susceptibility Model of the Alberta Plains and Shield Regions (gridded data, geotiff format)

Author(s) Pawley, S. Hartman, G.M.D. Chao, D.K. Date 2016-12-15

This raster dataset is a 90m grid used for producing the Landslide Susceptibility Model of the Alberta Plains and Shield Regions, Alberta Geological Survey Map 605. It represents the degree to which terrain can be affected by landslides based on a statistical procedure that establishes the relationship between the spatial distribution of past landslides, and predisposing geological, topographic and climatic factors.

The model results portray the spatial distribution of landslide susceptibility across the Alberta Plains as a relative ranking from low to high. It is intended to be used for educational purposes and regional-scale planning initiatives. Importantly, it does not evaluate the probability of landslide occurrence over any specific period of time, nor does it evaluate the magnitude or impact of any potential landslide activity. Consequently, the model results should not be interpreted for the purpose of site-specific landslide identification, landslide activity assessment, or landslide hazard appraisal.

The prediction of landslide susceptibility has been performed across the Alberta portion of the Interior Plains and Canadian Shield. The evaluation methodology does not assess the effect of significantly folded and faulted bedrock structure, and therefore does not include the mountains and foothills physiographic regions, where bedrock structure is the main geologic control on landslide susceptibility. While bedrock structure within the Shield is complex, it is not considered a significant geologic control on landslide susceptibility due to the high strength of bedrock in that region; therefore, the Shield has been included in the model. 

Pawley, S., Hartman, G.M.D. and Chao, D.K. (2016): Relative Landslide Susceptibility Model of the Alberta Plains and Shield Regions (gridded data, geotiff format); Alberta Energy Regulator, AER/AGS Digital Data 2016-0044