Evaluation of subaerial landslide hazards in Knight Inlet and Howe Sound, British Columbia

This thesis evaluated hazards from subaerial (originating above sea level) landslide-induced tsunamis in Knight Inlet and Howe Sound. Field assessments were conducted at Adeane Point and Mount Gardner. GIS was used at site and inlet scales to compile existing map data, to map submarine slide deposits, to measure topographic parameters, and to integrate observations. Modelling at Adeane Point employed kinematic, limit equilibrium (SWEDGE) and discrete element (3DEC) analyses in order to estimate the volume of a potential landslide. Results suggest that the hazard from subaerial slide-induced waves is high in Knight Inlet, particularly in the area between Adeane Point and Glacier Bay, whereas, when compared with Knight Inlet, the hazard in Howe Sound appears considerably less. Modelling results suggest that topography and discontinuity persistence are the leading controls on failure volume. A preliminary catalogue of techniques for assessing hazards from slide waves was created, and related issues were discussed.