영산호 운영을 위한 홍수예보모형의 개발(III) -배수갑문 조절에 의한 홍수파의 전달-

River Flow Forecasting Model for the Youngsan Estuary Reservoir Operation(III) - Pronagation of Flood Wave by Sluice Gate Operations -

An water balance model was formulated to simulate the change in water levels at the estuary reservoir from sluice gate releases and the inflow hydrographs, and an one-di- mensional flood routing model was formulated to simulate temporal and spatial varia- tions of flood hydrographs along the estuarine river. Flow rates through sluice gates were calibrated with data from the estuary dam, and the results were used for a water balance model, which did a good job in predicting the water level fluctuations. The flood routing model which used the results from two hydrologic models and the water balance model simulated hydrographs that were in close agreement with the observed data. The flood forecasting model was found to be applicable to real-time forecasting of water level fluc- tuations with reasonable accuracies.