Failure behaviour of bedrock and overburden landslides of the Peace River Valley near Fort St. John, British Columbia
Kristen Van Esch, Oldrich Hungr
In the proceedings of: GeoMontréal 2013: 66th Canadian Geotechnical Conference; 11th joint with IAH-CNCSession: Landslides I
ABSTRACT: A reach of Peace River between Fort St. John and Hudson™s Hope flows in a steepsided valley cut by meltwater and Holocene river flow through Cretaceous shale and sandstone covered by clay-rich glaciolacustrine deposits. Numerous landslides occur on the banks, initiating in both the bedrock and overburden. Following a recently completed local landslide inventory and the completion of an airborne LiDAR survey, five landslides have been examined in detail: the Attachie Slide, the Moberly River Slide, the Halfway River Slide, the Cache Creek Slide and the Tea Creek Slide. Analysis of the five case studies suggests that most slope movements can be attributed to one of four dominant landslide failure mechanisms: compound rock slides, compound overburden slides, shallow rapid flow slides, and earth flows.
RÉSUMÉ: Un tronçon de la rivière Peace situé entre Fort St John et Hudson™s Hope coule au travers d™une vallée dont le facies est constitué de formations schisteuses et gréseuses recouvertes de sédiments glacio-lacustres du Crétacé riches en argile. De nombreux glissements de terrains initiés aussi bien dans le substratum rocheux que dans les couches sédimentaires de surface affectent les flancs abrupts des berges érodées par les eaux de fontes et les rivières de l™Holocène. Cinq glissements ont été étudiés plus en détail à la suite d™un inventaire localisé des glissements de terrain et d™un relevé par télédétection laser (lidar): le Glissement Attachie, le Glissement de la Rivière Moberly, le Glissement de Halfway River, le Glissement de Cache Creek et le Glissement de Tea Creek. Une analyse des cinq études de cas permet d™attribuer la majeur partie des mouvements de pentes à l™un des quatre mécanismes principaux de rupture de glissement de terrain : glissement rocheux composé, glissement composé dans les couches sédimentaires de surface, glissement rapide de faible profondeur et coulées de terre.
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Kristen Van Esch; Oldrich Hungr (2013) Failure behaviour of bedrock and overburden landslides of the Peace River Valley near Fort St. John, British Columbia in GEO2013. Ottawa, Ontario: Canadian Geotechnical Society.
@article{GeoMon2013Paper175,
author = Kristen Van Esch; Oldrich Hungr,
title = Failure behaviour of bedrock and overburden landslides of the Peace River Valley near Fort St. John, British Columbia,
year = 2013
}
title = Failure behaviour of bedrock and overburden landslides of the Peace River Valley near Fort St. John, British Columbia,
year = 2013
}