An unusually large debris flow at Hummingbird Creek, Mara Lake, British Columbia. On 11 July 1997 a very large debris flow occurred at Hummingbird Creek, Mara Lake, British Columbia. The debris avalanche entered the channel of Hummingbird Creek and triggered a debris flow. A three-dimensional runout model was used to simulate this event.
Results are in fair agreement with the observed behaviour.
This study emphasizes the need to carefully manage forest resources with high downstream risks and the need for hazard assessments prior to development on alluvial fans.