Flood risk estimation with scenario-based, coupled river-overland hydrodynamic modeling
Jae Young Leea,* Myeong Jun Nama Hyun Han Kwonb Ki Young Kimc
aInfra Research Institute, Incity bDept. of Civil Engineering, Chonbuk National University cInfrastructure Research Center, K-water Institute
A coupled river-overland hydrodynamic model was applied to estimate flood risk by a scenario-based approach. The study area is Seongseo Industrial Complex in Daegu which is located near Nakdong river and Geumho river. Inundation depth and velocity at each time were calculated by applying a coupled 1D/2D hydrodynamic model to the target area of interest. The 2D inundation analysis for river and overland domain was performed with the scenario-based approach that there are levee overflow against 100/200 year high quantile (97.5%) design flood and levee break against 100/200 year normal quantile (50%) design flood. The level of flood risk was displayed for resident/industrial area using information about maximum depth and velocity of each node computed from the 2D inundation map. The research outcome would be very useful in establishing specified emergency action plans (EAP) in case of levee break and overflowing resulting from a flood.
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