Large-scale wildfires that swept across Korea between March and April 2025 have heightened concerns about secondary hazards, particularly post-fire debris flows. This study develops an efficient technique for evaluating debris-flow hazards across the extensive burn scar. We applied the United States Geological Survey (USGS) Post-Fire Debris-Flow (PFDF) methodology to the 2025 wildfire-affected area to conduct a preliminary, spatially explicit hazard assessment. Model outputs were validated through targeted field investigations carried out during the first post-fire rainy season. The PFDF model successfully delineated topographically vulnerable sub-catchments, demonstrating its applicability to Korean geomorphic settings. The resulting hazard maps provide a rapid-assessment framework for prioritising post-fire mitigation measures. Nevertheless, further research is required to refine debris-flow risk assessments in Korea by integrating social-vulnerability indicators and sitespecific field data into the PFDF approach.
저자
Jong Seo Lee [ Technical Research Institute, Division of Research, Korea Association of Forest Enviro-conservation Technology ]
Corresponding Author
Kwang Youn, Lee [ Technical Research Institute, Division of Research, Korea Association of Forest Enviro-conservation Technology ]
Suk Hee Yoon [ Technical Research Institute, Division of Research, Korea Association of Forest Enviro-conservation Technology ]
Dong Hyun Kim [ Technical Research Institute, Division of Research, Korea Association of Forest Enviro-conservation Technology ]
