Modeling Sedimentation Process in Ipjang Reservoir using SWAT and EFDC
2018
Shinv, S.B., University of Florida, USA | Hwang, S.H., Seoul National University, Seoul, Republic of Korea | Her, Y., University of Florida, USA | Song, J., University of Florida, USA | Kim, H.K., Seoul National University, Seoul, Republic of Korea | Kang, M.S., Seoul National University, Seoul, Republic of Korea
Reservoir sedimentation is a major environmental issue, and various sediment load controls and plans have been proposed to secure clean and safe water resources. The objectives of this study were to estimate soil loss in the upper basins and predict sediment deposition in Ipjang reservoir using hydrologic and hydraulic model. To do so, SWAT (Soil and Water Assessment Tool) and EFDC (Environmental Fluid Dynamics Code) was used to estimate soil loss in two upper basins and to predict spatial distribution and amount of sediment deposition in the Ipjang reservoir, respectively. The hydrologic modeling results showed that annual average soil loss from the upper basins was 500 ton. The hydraulic modeling results demonstrated that sediment particles transported to the reservoir were mostly trapped in the vicinity of the reservoir inlet and then moved toward the bank over time. If long-term water quality monitoring and sediment survey are performed, this study can be used as a tool for predicting the dredging amount, dredging location and proper dredging cycle in the reservoir. The study findings are expected to be used as a basis to establish management solutions for sediment reduction.
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