| Title |
A Study on Selection of Optimal Shelters according to Dam Break Scenario Based on Continuous Rainfall Event |
| Authors |
김경훈(Kim, Kyunghun) ; 임종훈(Lim, Jonghun) ; 김형수(Kim, Hung Soo) ; 신성철(Shin, Soeng Cheol) |
| DOI |
https://doi.org/10.12652/Ksce.2023.43.4.0433 |
| Keywords |
비상대처계획; 연속호우사상; 댐 붕괴; 최적 대피소 Emergency Action Plan (EAP); Continuous rainfalls; Dam break; Optimal shelter |
| Abstract |
There is a growing demand for the stability of existing dams due to abnormal climate and the aging of dams. Emergency Action Plans (EAPs) for reservoir or dam failure only consider a single rainfall event. Therefore, this study simulates dam failure caused by continuous rainfall events, and proposes the establishment of EAP by selecting the optimal shelters. We define a mega rainfall event scenario caused by continuous rainfall events with 500-year frequency in the Chungju Dam watershed and estimate the mega flood. The mega flood event scenario is divided into two cases: scenario A represents the flooding case caused by discharge release from a dam, while scenario B is the case of a dam break. As a result of flood inundation analysis, the flooded damage area by the scenario A is 50.06 km2 and the area by the scenario B is 6.1 times of scenario A (307.45 km2). We select optimal shelters for each administrative region in the city of Chungju, which has the highest inundation rate in the urban area. Seven shelter evaluation indicators from domestic and foreign shelter selection criteria are chosen, and Analytical Hierarchy Process (AHP) method is used to evaluate the alternatives. As a result of the optimal shelter selection, the six shelters are selected and five are schools. This study considers continuous rainfall events for inundation analysis and selection of optimal shelters. Also, the results of this study could be used as a reference for establishment of the EAP. |