Enhancing the Integrated Utilization System for Hazard Maps in Response to Complex Flood Risks in Korea

As the frequency and intensity of natural disasters continue to rise due to climate change, the importance of hazard maps in disaster risk reduction has grown significantly. In Korea, various types of hazard maps—including flood trace maps, inundation forecast maps, landslide risk maps, and coastal flood projection maps—are produced by multiple agencies using different standards and methods. However, fragmentation, inconsistencies in mapping guidelines, and lack of integration have undermined their utility in field-level disaster response and planning. This study aims to enhance the integrated utilization system for hazard maps by analyzing current institutional practices, identifying key limitations, and proposing improvements to the national mapping guidelines. Methodologies include a comparative analysis of existing map types, a review of official standards, and the development of a prototype system integrating flood, landslide, and coastal risk data into a unified GIS platform. Key findings reveal significant disparities in flood depth thresholds, simulation models, and public accessibility across agencies. The study proposes a standardized guideline framework, enhanced digital interoperability, and user-centered features for both administrators and citizens. A pilot application in Seoul demonstrated improved hazard visualization, evacuation planning, and inter-agency coordination. The proposed integrated system is expected to significantly strengthen Korea’s disaster resilience by enabling data-driven preparedness, faster response, and more effective public communication. This research provides actionable policy recommendations and a scalable model for other nations facing similar challenges in multi-hazard environments.