Forest Science Program


Landslides in organic soils on forested slopes

Author(s) or contact(s): D. Campbell, B. Roberts, J. Schwab, and T. Millard
Source: Forest Science Program
Subject: Geomorphology
Series: Extension Note
Other details:  Published 2010. Hardcopy is available.


The cool, wet climate of British Columbia’s Central and North Coast and northern Vancouver Island has created extensive forested landscapes with organic and organic-rich soils that have developed on moderate to steep slopes. Landslides in organic soils provide a challenge to forest operations in coastal British Columbia. Often landslides initiate at much lower slope gradients than is typical for shallow landslides; as a result, the hazards associated with organic soils are sometimes not identified. Landslides in organic soils are frequently triggered during road construction and timber harvesting activities, and therefore can pose a significant risk to worker safety.

The objectives of this Extension Note are to:
• promote awareness about land slides in organic soils on gentle through moderately steep slopes, provide details on site conditions
• associated with landslides in organic
soils, and provide alternative management
• strategies to manage the risk associated with road construction and timber harvesting in areas in which organic landslides could occur.

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Updated January 12, 2011