Conference Agenda
Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
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Daily Overview |
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Poster session: Poster session with drinks and snacks Location: HSB3 | |
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Poster
Quantitative Flood Risk Assessment in the Oncheon Stream Basin: Fatality Estimation and Risk Analysis Using HEC-RAS 1D and HEC-LifeSim Department of Safety Engineering / Incheon National University, Korea, Republic of (South Korea) This study analyzes extreme flood events (with return periods of 200–1000 years) that could occur in the Oncheon Stream basin in Busan, South Korea, comparing a traditional Quantitative Risk Assessment (QRA) approach with the HEC-LifeSim model developed by the U.S. Army Corps of Engineers (USACE). Using unsteady flood simulation results from HEC-RAS 1D, we precisely estimate potential loss of life and construct Frequency–Number of fatalities (F–N) curves. While conventional equation-based QRA methods do not adequately account for dynamic evacuation processes, HEC-LifeSim integrates evacuation time, population characteristics, and traffic networks to quantitatively estimate the number of fatalities. Consequently, fatalities are quantified through physical processes, leading to a more intuitive and comprehensive risk assessment. The analysis reveals that, due to the combined effects of urbanization and climate change, certain reaches of Oncheon Stream face severe flood risks exceeding the conventional 100-year design threshold. Future research will aim to incorporate real evacuation behavior data and climate change scenarios into HEC-LifeSim, thereby enhancing the reliability of flood risk assessments and decision-making support. | |