Landslides along Valley Walls of Qu’Appelle River, Saskatchewan
Hung Vu, Laurie Stang, Harpreet Panesar, Hamid Soleymani, Jody Schafer
In the proceedings of: GeoOttawa 2017: 70th Canadian Geotechnical Conference; 12th joint with IAH-CNCSession: Geohazards IV / Transportation Geotechnics I
ABSTRACT: The Qu™Appelle River Valley was formed as a spillway and meltwater channel. The valley and its main tributaries provide a significant contrast to the local low relief topography in Southeastern Saskatchewan. As a result, most of the landslide problems occur where highways and bridges are built and urban developments are located along the river valley walls. The level of landslide activities has increased in recent years due to increased precipitation. This paper provides an overview of the geology, stratigraphy and groundwater conditions, current slope stability conditions of the valley wall, effect of rainfall to landslide activities, technical challenges to landslide remediation and remediation measures used. The paper also presents a number of case histories where potential significant economic loss of infrastructure and/or public safety concerns are involved, including i) Large retrogressive, multiple and/or multilevel failures in shale bedrock where the shale bedrock surface outcrops above the floodplain; and ii) Landslides on the till backslope of existing roads where the till/shale bedrock surface is deep. RÉSUMÉLa Vallée Qu'Appelle a été formée comme un canal d'épandage et d'eau de fonte. La vallée et ses principaux affluents offrent un contraste significatif avec la topographie locale de bas-relief dans le sud-est de la Saskatchewan. En conséquence, la plupart des problèmes de glissements de terrain ont été identifiés où des routes et des ponts sont construits et des aménagements urbains sont situés le long de ces murs de la vallée de la rivière. L'activité de glissement de terrain a augmenté récemment en raison de la précipitation accrue. Cet article donne un aperçu de la composition géologique, les conditions de la stratigraphie et d'eau souterraine, et les conditions actuelles de la stabilité des pentes de la vallée. L™article présente aussi des études de cas qui impliquent une potentielle importante de perte économique d'infrastructure et/ou la sécurité publique, y comprenant i) Des grands glissements de terrain régressifs, avec multiples et/ou multiniveaux glissements de terrain, dans le rocheux de schiste où la surface rocheux de schiste dépasse la plaine inondable; et ii) Des glissements de terrain sur la pente arrière des routes existantes où la surface till/schiste est profonde.
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Cite this article:
Hung Vu; Laurie Stang; Harpreet Panesar; Hamid Soleymani; Jody Schafer (2017) Landslides along Valley Walls of Qu’Appelle River, Saskatchewan in GEO2017. Ottawa, Ontario: Canadian Geotechnical Society.
@article{geo2017Paper634,
author = Hung Vu; Laurie Stang; Harpreet Panesar; Hamid Soleymani; Jody Schafer,
title = Landslides along Valley Walls of Qu’Appelle River, Saskatchewan,
year = 2017
}
title = Landslides along Valley Walls of Qu’Appelle River, Saskatchewan,
year = 2017
}