CGRG Bibliography of Canadian Geomorphology
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Author : Bobrowsky, P.; Chung, C.; Garson, D.; and Guthrie, R.H.
Date : 1998.
Title : Quantitative landslide hazard mapping on Northern Vancouver Island, BC, Canada.
Publication : Proceedings of the 8th Congress of the International Association of Engineering Geology and the Environment
Issue : III
Page(s) : 2031-2037
Abstract
A quantitative prediction model for landslide hazard mapping using Bayesian probability formulae based on a favorability function approach has been developed for a test case from northern Vancouver Island, BC. Digital spatial data used includes: Terrain Resource Infromation Management (TRIM)data, Surficial Geology data and Biogeoclimatic Subzone/Variant Digital map data. Landslides were mapped using aerial photographs and then field checked and dated using standard techniques. The position, shape and characteristics of each failure was digitally recorded. A total of 29 landslides were documented as occurring prior to 1978 and an additional 12 events were recognized for the period 1979 to 1996. From the DEM, we generated measurements of aspect, slope and height classes for individual pixels covering the entire study area. Pixels measured 30 x 30 m in size. Each layer was evaluated separately as a causal factor for landsliding and then used in the prediction of future landsliding. By relying on the trigger point of individual failures and the above input data, we generated estimated probabilistic hazard zonation areas.
Bibliography of Canadian Geomorphology