Application of the sediment transport capacity models to unsteady sediment transport from overland flow

There are some sediment transport capacity model for soil erosion and transport from overland flow.These sediment transport rate are used in steady sediment transport.The soil erosion and sediment transport model for overland flow is developed in the paper.The physical-based sediment transport equations are derived from the assumption that the sediment transport capacity can be determined by a dominant variable such as flow discharge,flow velocity, shear stress,stream power,unit stream power.The coefficients of the model are computed by experimental data.The sediment transport capacity models are applied to different rainfall intensity and slope.The results indicate that the unit stream power model gives better simulation sediment loadfor small rainfall intensity.The shear stress model simulates sediment load more satisfactorily for large rainfall intensity.