Stuart-Takla Watersheds
Terrain and Sediment Sources
Description:... Concern over the potential impacts of logging on sockeye salmon in the Stuart-Takla watershed of British Columbia has led to initiation of a multi-agency project to study the effects of forest practices on fish production and aquatic environments. As the effects of logging and road construction on sediment input to streams are strongly affected by the erodibility and stability of local surficial materials, a terrain (surficial geology) map is an essential part of the database for such a project. This report reviews the bedrock geology, topography, and evolution of the landscape under glaciation of the Stuart-Takla watershed, and describes the terrain mapping methodology used in the project. It then defines and describes the types of surficial materials found in the watershed, including till and other glacier-derived material, the geomorphological processes affecting the landscape, and sediment sources encountered. The report concludes with consideration and recommendations for forest surface management.
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