| Title |
Estimating the Amounts of Long-term Cohesive Sediment Deposition in Two Tide-dominated Bays of South Korea: Numerical Study |
| Keywords |
cohesive suspended sediment;long-term deposition;two-dimensional numerical modeling;the asan bay;the cheonsu Bay;HSCTM-2D;점착성 부유사;장기퇴적량;2차원 수치모델링;아산만;천수만 |
| Abstract |
In this study, a two-dimensional hydrodynamic and sediment transport modeling system, HSCTM-2D is employed to simulate the amounts of long-term cohesive sediment deposition in two study bays, and its applicability is evaluated. The modeling system"s two modules for hydrodynamic modeling and sediment transport modeling are calibrated, comparing the simulated results and the observed tidal levels, tidal current velocities, and suspended sediment concentrations in the Asan and the Cheonsu Bays, South Korea. It is found that there are good agreements between the simulation results and the observed values. The amounts of long-term cohesive sediment deposition of the two study bays are estimated using the modeling system, taking the suspended sediment concentrations from the open ocean in the tide-dominated environment into account. And, in the case of the Asan Bay, the annual deposition rate reaches 8.1 ㎝/yr; the Cheonsu Bay, 14.5 ㎝/yr. Overall, it is concluded that the modeling system is useful to understand the physical process of cohesive suspended sediment transport and deposition in tidal water bodies and to establish the mitigation strategy. |