Post-Wildfire Debris Flow and Large Woody Debris Transport Modeling from the North Complex Fire to Lake Oroville

The increase in wildfires across much of Western United States has a significant impact on the water quantity, quality, and sediment large woody debris transport (LWD) within watershed reservoirs. There is need to understand volume fate LWD transported by post-wildfire flows Lake Oroville Reservoir, north Sacramento, California. Here, we combine flow modeling, hydrologic hydraulic modeling assess how from medium small watersheds Oroville. Debris triggered 50-year rainfall intensity, 13 watersheds, 1073 pieces (1579.7 m3) mainstem river. Large was performed for 1-, 2-, 5-, 25-, 50-, 100-, 500-year flows. ratio increased with discharge as expected. reservoir during 2-year event 25% no removal 9% greater than cross-section width. produced ratios 58% 46% our two sub scenarios.