It is essential to obtain periodic sediment discharge data in a river in order to minimize problems that may arise from
the erosion, transport, and deposition of sediment. However, it is difficult to estimate sediment discharge by the
sediment discharge measurement plan in Korea at present, and empirical fomulas or numerical models are used to
replace them. This paper has applied the K-DRUM model, a grid-based rainfall-runoff-sediment model, to estimate
sediment discharge and ensure the continuity of the data in the watershed. Discharge and sediment load in 17
watersheds were estimated and the applicability of the model was analyzed through comparisons with measured data.
For quantitative evaluation, NSE, PBIAS and RSR items were used, and discharge results reflected the tendency of
rainfall and showed high statistical value. In case of sediment discharge, the soil erosion process of the watershed is
physically well reflected. When the calibration was performed using the measure data, the applicability seems to be
excellent in estimating the continuous sediment discharge data in the real watershed.