抄録
This paper presents a validation of non-equilibrium bed-load model for numerical simulation of bed evolution. We applied saltation length to Nakagawa and Tsujimoto-type’s non-equilibrium bed-load model assuming that the non-equilibrium bed-load on dune bed is characterized by the salutation length scale and pick-up rate is estimated by equilibrium bed-load rate. The simulation using the presentbed-load model reasonably reproduced bed evolutions measured in experiments. We also validated values of effective shear stress, which is estimated by average flow velocity, bed shear stress and average bed-load on dune bed as the simulation results.Calculated bed-load rate in the simulations was shown to reproduce the average bed-load rate on dune bed well.
