DefinePK

Abstract

Bed load sediment transport generally depends on shear stress and orbital wave velocity near the sea bottom. Calculation of bottom shear stress is a very important step and is required as input for the most models of sediment transport. The formula of bottom shear stress of some researchers only were tested based on experimental data and still rarely used for field data due to problems in obtaining field data quality. In this paper, the bottom shear stress and bed load sediment transport formula is proposed and be modified under irregular wave condition for modelling the morphological change based on the velocity data obtained from the results of the Hydrodynamic Modelling by Mike 21 Software. This model has been validated with field measurement data with error level of 0.5% for surface elevation. The proposed method of bottom shear stress and bed load sediment transport was examined by the sediment transport and the morphological change modeled by Sand Transport (ST) modules of Mike 21 Software. It can be concluded that the proposed method could predict well. The result from the calculation of bottom shear stress and bed load sediment transport showed reasonable results when compared with the results of modeling by Mike 21 software in the area of canal water intake.