Inventory of Large Landslides in Sensitive Clay in the Province of Québec, Canada: Preliminary Analysis

The Ministere des Transports du Quebec is currently conducting a comprehensive inventory of large historical landslides that have occurred in sensitive clays in Quebec. One hundred and eight cases have been identified during the period from 1840 to 2012 through historical documents or aerial photos. Detailed data have been collected for numerous sites with respect to pre- and post-failure topography, soil properties, the position of the failure surfaces and the groundwater flow regime. In addition, piezocone soundings have been conducted at approximately 50 other undated large landslide sites in various regions in Quebec. This article summarizes the preliminary analysis of these data.