December 3, 2021 2:03 pm
Augmentation and Use of WRF-Hydro to Simulate Overland Flow- and Streamflow-Generated Debris Flow Hazards in Burn Scars
Chuxuan Li, Alexander L. Handwerger, Jiali Wang, Wei Yu, Xiang Li, Noah J. Finnegan, Yingying Xie, Giuseppe Buscarnera, and Daniel E. Horton
Nat. Hazards Earth Syst. Sci. Discuss., https//doi.org/10.5194/nhess-2021-345,2021
Preprint under review for NHESS (discussion: open, 0 comments)
In January 2021 a storm triggered numerous debris flows in a wildfire burn scar in California. We use a hydrologic model to assess debris flow hazards in pre-fire and postfire scenarios. Compared to pre-fire conditions, the postfire simulation yields dramatic increases in total and peak discharge, substantially increasing debris flow hazards. Our work demonstrates the utility of 3-D hydrologic models for investigating and potentially forecasting postfire debris flow hazards at regional scales.