Author(s):
Susan H. Cannon, Jerome DeGraff
Year Published:

Cataloging Information

Topic(s):
Post-fire Management
Post-fire Rehabilitation
Erosion Control

Record updated: December 10, 2018
NRFSN number: 18703

In southern California and the intermountain west of the USA, debris flows generated from recently-burned basins pose significant hazards. Increases in the frequency and size of wildfires throughout the western USA can be attributed to increases in the number of fire ignitions, fire suppression practices, and climatic influences. Increased urbanization throughout the western USA, combined with the increased wildfire magnitude and frequency, carries with it the increased threat of subsequent debris-flow occurrence. Differences between rainfall thresholds and empirical debris-flow susceptibility models for southern California and the intermountain west indicate a strong influence of climatic and geologic settings on post-fire debris-flow potential. The linkages between wildfires, debris-flow occurrence, and global warming suggests that the experiences in the western United States are highly likely to be duplicated in many other parts of the world, and necessitate hazard assessment tools that are specific to local climates and physiographies.

Citation

Cannon S, and DeGraff J. 2009. The increasing wildfire and post-fire debris-flow threat in Western USA, and implications for consequences of climate change. In: Sassa K, and Canuti P, eds. Landslides - disaster risk reduction. Berlin, Germany. Springer: 177-190.

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