Temporal changes in rainfall intensity–duration thresholds for post-wildfire flash floods in southern California

Liu, Tao; McGuire, Luke A.; Oakley, Nina; Cannon, Forest

doi:https://doi.org/10.5194/nhess-22-361-2022

Articles | Volume 22, issue 2

https://doi.org/10.5194/nhess-22-361-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Advances in flood forecasting and early warning

https://doi.org/10.5194/nhess-22-361-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 2

Research article

|

10 Feb 2022

Research article |

| 10 Feb 2022

Temporal changes in rainfall intensity–duration thresholds for post-wildfire flash floods in southern California

Tao Liu, Luke A. McGuire, Nina Oakley, and Forest Cannon

Supplement

https://doi.org/10.5194/nhess-22-361-2022-supplement

Data sets

NHESS-Temporal changes in rainfall intensity–duration thresholds Tao Liu https://doi.org/10.17605/OSF.IO/62H3P

Research article (https://onlinelibrary.wiley.com/doi/10.1002/hyp.14208) Tao Liu, Luke A. McGuire, Haiyan Wei, Francis K. Rengers, Hoshin Gupta, Lin Ji, and David C. Goodrich https://doi.org/10.1002/hyp.14208

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Short summary

A well-constrained rainfall-runoff model forced by radar-derived precipitation is used to define rainfall intensity-duration (ID) thresholds for flash floods. The rainfall ID doubles in 5 years after a severe wildfire in a watershed in southern California, USA. Rainfall ID performs stably well for intense pulses of rainfall over durations of 30-60 minutes that cover at least 15%-25% of the watershed. This finding could help issuing flash flood warnings based on radar-derived precipitation.