Post-fire soil hydrologic response and recovery in northern California (USA)
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Abstract
Wildfires abruptly change landscapes by altering soil properties and vegetation cover. These changes are thought to reduce soil infiltration capacity, making landscapes susceptible to runoff and erosion. However, post-fire soil response is complex and likely varies across locations and time.
Here, we aim to understand regional post-fire soil response and recovery by tracking changes across different northern California (USA) lithology and vegetation types.
We conducted repeat in situ soil infiltration tests for 3 years post-fire at 31 burned and 10 unburned sites spanning the 2021 Dixie, 2020 LNU Lightning Complex, 2020 Walbridge and 2020 Glass fires.
Our two main findings are: (1) burned chaparral soils have increased hydraulic conductivity compared with unburned sites, and (2) infiltration rates return to pre-fire conditions within 3 years across most lithologies and vegetations.
Recovery might be generalizable by vegetation and lithology but differ regionally, making it important to identify meaningful hydrologic response units (HRUs). Multi-year studies with paired burned and unburned measurements can constrain the recovery timeline and provide information missed by observations solely of burned soils.
Understanding where, and for how long, soil remains susceptible to runoff and erosion can help prioritize areas and time periods most in need of mitigation.
Suggested Citation
Cerovski-Darriau, C., Perkins, K., Creamer, C., Prancevic, J.P., and Stock, J.D., 2026, Post-fire soil hydrologic response and recovery in northern California (USA): International Journal of Wildland Fire, v. 35, no. 6, WF25141, 18 p., https://doi.org/10.1071/WF25141.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Post-fire soil hydrologic response and recovery in northern California (USA) |
| Series title | International Journal of Wildland Fire |
| DOI | 10.1071/WF25141 |
| Volume | 35 |
| Issue | 6 |
| Publication Date | June 04, 2026 |
| Year Published | 2026 |
| Language | English |
| Publisher | CSIRO Publishing |
| Contributing office(s) | Geology, Minerals, Energy, and Geophysics Science Center |
| Description | WF25141, 18 p. |
| Country | United States |
| State | California |
| Other Geospatial | northern California |