Increases in the frequency and severity of extreme rainfall might cause catastrophic submergence of underground spaces. Therefore, it is essential to predict the flood risk for proactive design. This study presents the methodology of acquiring risk level considering both flood intensity and evacuation difficulty. The flood momentum was computed by a 2D hydraulic flow model, and the flood intensity (FI) was employed to evaluate the consequence of flooding. To investigate the level of evacuation difficulty, the spatial layout of rooms, together with walking speed, were considered in the risk analysis process. If stormwater runoff enters an underground space, zones far away from the inlet usually have low risk levels. However, when the level of evacuation difficulty was considered, the risk level was dependent on the evacuation distance and location of the inlet and exit. If people are in zones with a risk level of 4 or 5, a rapid evacuation is necessary for preventing human casualties. The proposed methodology incorporated with the inundation model can be applied to any underground space regardless of the location of stairs, the number of exits, shape of rooms, or layout of the floor. Consequently, it will contribute to mitigating flood damage in an underground space.
Large-scale complex disasters and new types of disasters are occurring due to climate changes and changes in the social environment. As the type of disaster changes to a complex and large-scale trend, disaster management resources are being mobilized to minimize damage to life and property caused by large-scale complex disasters. However, because there are various types of disaster management resources and a huge number of demand stockpiles are required, it is difficult task to possess and utilize resources for each type of disaster. In addition, since the response system to the occurrence of a large-scale complex disaster is insufficient, analysis is needed to improve the problems of the disaster management resource management system. In this study, a survey was conducted focusing on the disaster management resource support and system. The survey showed that the difference in perception of distributed management in the disaster management resource-related laws showed statistically significant differences according to age. Based on the results of the survey, problems and improvement plans for disaster management resources support system were derived.
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