Abstract: In the present study, the local scour and topographical change in open channels of a tideland dike are studied numerically. A 2D numerical model was presented for the simulation of scour depth in open channels of the tideland dike in the west of the DPR Korea. Because the computation using a 3D numerical model is time-consuming, the depth-averaged 2D numerical model is applied in the calculation of the scour depth. The numerical model is implemented by the method coupled finite element method with finite difference method. Generally, scour depth depends on flow velocity, bed material composition, and suspended sediment concentration. In the present study, as the width of open channel between tideland dikes decreased, the scoured depth dramatically increased due to increased flow velocity. For all the scenarios of damming up, however, the scoured depth increased very slightly in open channels with the width of 50 m. The numerical results showed that when damming up according to Scenario 1, the flow velocity and scoured depth are smallest.Abstract: In the present study, the local scour and topographical change in open channels of a tideland dike are studied numerically. A 2D numerical model was presented for the simulation of scour depth in open channels of the tideland dike in the west of the DPR Korea. Because the computation using a 3D numerical model is time-consuming, the depth-averaged ...Show More
