Post-Wildfire Debris Flows in Montecito, California (USA): A Case Study and Empirically Based Debris Volume Estimation

Wildfires have a strong influence on various geotechnical and hydraulic properties of soils sediments, which may become more vulnerable to landslides or debris flows. In the present study, case investigation 2018 post-wildfire flows in Montecito, California, USA, was conducted, with focus wildfire-affected areas volume estimation. Significant were deposited around four major creeks, i.e., Montecito Creek, San Ysidro Buena Vista Romero Creek January, 2018, one month after Thomas fire. Satellite images utilizing remote sensing techniques geographic information system (GIS) data analyzed identify affected by wildfire. Relevant data, including slope, catchment area, rainfall used two empirical models estimate volumes creeks. As compared field observation, each estimated these within same order magnitude. The generally underestimated when using recorded at Weather Station; estimates considerably improved record from Doulton Tunnel Station. results showed that, overall, such approaches are still benefit for engineering practice, as they capable offering first-order approximations. accuracy availability critical factors; mountainous higher than low lands, consequently suitable estimation where typically occurred steep slopes elevations.