Coarse Sediment Hazard Modeling in the Fort St. James and Kootenay Lake Regions
Deposition of coarse sediment into stream channels, and onto fluvial fans and deltas is a natural part of sediment transport processes. Bedload material is essential to creating aquatic habitat diversity and stabilising stream channels. However catastrophic events, usually landslides, that deposit coarse sediment into stream channels often result in at least temporary destabilisation of the channel itself, and can sometimes result in long-term changes to a channel. Increases in coarse sediment inputs may result in:
By comparing various scenarios, we estimate the potential for changes in coarse sediment inputs between particular management scenarios and background levels, and between various management options themselves. Our results identified relative impacts to watersheds across the study area for each of the management scenarios ranging from full harvest of mountain pine beetle killed timber to an idealized state of a landscape that is fully forested and mature.