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Sixty years of post-fire assessment and monitoring on non-federal lands in California; what have we learned?


California has a long history of damage from post-fire flooding and debris flows, often described as the fire-flood sequence. Post-wildfire assessment has been conducted on California's non-federal lands for more than 60 years. From 1956 to 1999, the focus was on aerial grass seeding for emergency revegetation. Later, hillslope treatments including straw mulch and hydromulch were shown to be more effective in reducing erosion, but their high cost make them generally infeasible. In the 1990s the state moved away from aerial grass seeding and embraced a dual strategy for minimizing post-fire impacts. First, fire suppression repair work became consistently applied to all fires. Typical repairs include installing waterbreaks on firelines, grading roads, removing soil from crossings, and mulching mechanically disturbed areas near streams. Second, there was greater use of interdisciplinary teams to evaluate life-safety and property threats from debris flows, flooding, and rockfall on non-federal lands. The state process was pioneered by the California Geological Survey (CGS) in 1993 and has benefited from advances in spatially explicit modeling since 2000. Currently, state teams are co-led by the California Department of Forestry and Fire Protection and CGS, with evaluations only conducted on fires with significant threats. This approach is effective for rapidly notifying emergency management agencies of hazards, helping to protect lives and property. This process will benefit from further technological advances, monitoring, and improved modeling. Strategies for improving post-fire hazard evaluation and better emergency preparedness through pre-fire hazard mitigation planning are provided.

ISSN: 1078-7275
EISSN: 1558-9161
Coden: ENGEA9
Serial Title: Environmental & Engineering Geoscience
Serial Volume: 27
Serial Issue: 4
Title: Sixty years of post-fire assessment and monitoring on non-federal lands in California; what have we learned?
Title: Special issue on slope stability in memory of Jerome (Jerry) De Graff; part 1
Author(s): Cafferata, Peter H.Coe, Drew B. R.Short, William R.
Author(s): Staley, Dennisprefacer
Author(s): Lancaster, Jeremyprefacer
Author(s): Gallegos, Alanprefacer
Author(s): Wasklewicz, Thadprefacer
Affiliation: California Department of Forestry and Fire Protection, United States
Affiliation: U. S. Geological Survey, Anchorage, AK, United States
Pages: 409-422
Published: 202111
Text Language: English
Publisher: Geological Society of America, Association of Engineering Geologists, College Station, TX, United States
References: 70
Accession Number: 2021-076063
Categories: Environmental geologyGeomorphology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
N32°30'00" - N42°00'00", W124°30'00" - W114°15'00"
Secondary Affiliation: California Geological Survey, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Abstract, Copyright, Association of Engineering Geologists and the Geological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202152
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