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Recent instances of “excessive disasters,” which can be characterized as unprecedented and catastrophic, cause great damage and loss of life. One such incident is dam failure, which significantly affects downstream regions. Therefore, it is imperative to select flood inundation areas and establish EAP in advance. In addition, to prevent possible damage due to dam failure, flood wave analysis and evacuation map should be based on accurate hydraulic analysis. Accordingly, this study highlights the challenges in existing hydraulic analysis and suggests a method of establishing EAP by applying the 2-D model. Further, it compares the applicability of establishing EAP between 1-D and 2-D models using the Sandae reservoir incident, the actual collapse case. Consequently, it found that compared to the 1-D model, flood inundation analysis using the 2-D model can accurately reflect on topography such as roads and buildings and provide a wide range of information such as flood depth and flood velocity distribution. Thus, this study is expected to recommend an efficient method of selecting flood inundation areas and establishing informative EAP.

Applicability Analysis of 2-D Model for Evacuation Map to Establish Dam Emergency Action Plan