Abstract
Damages by hurricanes and regional torrential rains due to anomaly climate changes take up the most of recent meteorological disasters in Korea. To reduce these damages, producing flood hazard maps and disaster maps is essential, and accordingly, the interpretation of flood inundation by scenario accounts for an important part. This study established a flood inundation scenario at Sacheon River in Gangneung-si and carried out an analysis using the HEC-GeoRAS model. The rainfall data at the Gangneung General Observation Post from 1961 to 2010(50 years) were used for probable rainfall, and the scenario was analyzed by assuming the case of Typhoon Rusa with 100-year and 200-year frequencies and Probable Maximum Flood (PMF). As a result, flood inundation is predicted if it exceeded the 100-year frequency rainfall while for the 200-year frequency and PMF frequency, flooded areas were simulated at 64.3 ha and 135.9 ha, respectively and maximum flooded depths in 4.1 m and 5.7 m, respectively. It is expected that these results will help predict flood inundation area with rainfall in the duration using the synthetic data of the real-time weather data and the model numerical analysis.
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