| Abstract: | Empirical models to estimate the probability of occurrence and volume of postwildfire debris flows can be quickly implemented in a geographic information system (GIS) to generate debris-flow hazard maps either before or immediately following wildfires. Models that can be used to calculate the probability of debris-flow production from individual drainage basins in response to a given storm were developed using logistic regression analyses of a database from 388 basins located in 15 burned areas located throughout the U.S. Intermountain West. The models describe debris-flow probability as a function of readily obtained measures of areal burned extent, soil properties, basin morphology, and rainfall from short-duration and lowrecurrence-interval convective rainstorms. A model for estimating the volume of material that may issue from a basin mouth in response to a given storm was developed using multiple linear regression analysis of a database from 56 basins burned by eight fires. This model describes debris-flow volume as a function of the basin gradient, aerial burned extent, and storm rainfall. Applications of a probability model and the volume model for hazard assessments are illustrated using information from the 2003 Hot Creek fire in central Idaho. The predictive strength of the approach in this setting is evaluated using information on the response of this fire to a localized thunderstorm in August 2003. The mapping approach presented here identifies those basins that are most prone to the largest debris-flow events and thus provides information necessary to prioritize areas for post fire erosion mitigation, warnings, and prefire management efforts throughout the Intermountain West. ?? 2009 Geological Society of America. |
| Genre: | Article |
| ProdID: | 70037178 |
| Citation Author: | Cannon, S. H.; Gartner, J. E.; Rupert, M. G.; Michael, J. A.; Rea, A. H.; Parrett, C. |
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| Citation End Page: | 144 |
| Citation Issue: | 1-2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Bulletin of the Geological Society of America |
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| Citation Number Of Pages: | 18 |
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| Citation Search Results Text: | Predicting the probability and volume of postwildfire debris flows in the intermountain western United States; 2010; Article; Journal; Bulletin of the Geological Society of America; Cannon, S. H.; Gartner, J. E.; Rupert, M. G.; Michael, J. A.; Rea, A. H.; Parrett, C. |
| Citation Start Page: | 127 |
| Citation Volume: | 122 |
| Citation Year: | 2010 |
| Type: | citation/reference |
| Text: | Predicting the probability and volume of postwildfire debris flows in the intermountain western United States; 2010; Article; Journal; Bulletin of the Geological Society of America; Cannon, S. H.; Gartner, J. E.; Rupert, M. G.; Michael, J. A.; Rea, A. H.; Parrett, C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1130/B26459.1 |
| Date Other: | Fri, 1 Jan 2010 00:00 -0600 |
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