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In this study, we conducted a study on the step of recognizing the necessity of dredging in Korea which the dredging regulation is not sufficient. For this purpose, the method of selecting target area for dredging considering flood risk was suggested using freeboard criterion in river design standard of Korea. The suggested method was applied to Geum river basin where three multi-functional weirs are operated. As a result, it was found that three site did not satisfy the freeboard regulation. Among them, the Miho stream confluence site showed the greastest aggradation of the riverbed. So, the Miho stream confluence site was selected as the dredging target site, and dredging volume according to the riverbed change was estimated. Therefore, through suggested method in this study, it is expected to provide basic data and selecting method for target dredging area considering flood risk.

Estimation of River Dredging Location and Volume Considering Flood Risk Variation Due to Riverbed Change