도시 지형기후학적순간단위도를 이용한 도시 유역의 홍수 경보우량 산정기법 검토 연구

The Study of the Fitness on Estimation of the Flood Warning Rainfall Using UMcIUH in a Urban Area

We estimate the fitness to calculate the flood warning rainfall using UMcIUH(Urban Morpho-Climatic Unit Hydrograph) including hydraulic elements(street, pipes and channels etc) and climatic elements(upslope inflow, effective rainfall etc). Oncheon basin is separated to 7 subbasin and the result of UMcIUH model simulation is compared to the observation data and the result of EPA SWMM simulation. By using local regression equation and HEC-RAS model, danger discharge and flood warning rainfall are estimated according to three stage by considering high flood stage and low flood stage. We found that a methodology based UMcIUH and hydraulic model was very proper in the calculation of the flood warning rainfall at the condition of high flood and low flood.