Forecasting the inundation of postfire debris flows
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Abstract
In the semi-arid regions of the western United States, postfire debris flows are typically runoff
generated. The U.S. Geological Survey has been studying the mechanisms of postfire debris-flow initiation for multiple decades to generate operational models for forecasting the timing, location, and magnitude of postfire debris flows. Here we discuss challenges and progress for extending operational capabilities to include modeling postfire debris-flow inundation extent. Analysis of volume and impacted area scaling relationships indicated that postfire debris flows do not conform to assumptions of geometric self-similarity. We documented sensitivity of impacted areas to rainfall intensity using a candidate methodology for generating inundation hazard assessments. Our results emphasize the importance of direct measurements of debris-flow volume, inundated area, and high temporal resolution rainfall intensity.
Suggested Citation
Barnhart, K.R., Jones, R., George, D.L., Rengers, F.K., Kean, J.W., 2023, Forecasting the inundation of postfire debris flows, in E3S Web of Conferences, v. 415, Turin, Italy, June 26-29, 2023, 04002, 4 p., https://doi.org/10.1051/e3sconf/202341504002.
Study Area
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Forecasting the inundation of postfire debris flows |
| DOI | 10.1051/e3sconf/202341504002 |
| Volume | 415 |
| Publication Date | August 18, 2023 |
| Year Published | 2023 |
| Language | English |
| Publisher | EDP Sciences |
| Contributing office(s) | Geologic Hazards Science Center, Volcano Science Center |
| Description | 04002, 4 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | E3S Web of Conferences |
| Conference Title | 2023 8th International Conference on Debris Flow Hazard Mitigation (DFHM8) |
| Conference Location | Turin, Italy |
| Conference Date | June 26-29, 2023 |
| Country | United States |
| State | California |
| City | Montecito |