| The present study proposes a method to predict sediment runoff and bed deformation in dam drainagebasin. The channel model is based on a unit channel model which can easily reproduce stream channelsdistributed in a drainage basin. The sediment transport model includes bedload, suspended load and washload transportation. In addition, the method involves a model to predict sediment entrainment from debriscones formed along the channel due to sediment supplies by landslides flows. Flow discharge at each unitchannel is predicted by means of two methods; one is to employ observed dam discharge and the other isto employ analysis of rainfall-runoff analysis. Validity of proposed model is tested in the Hatanagi-daiichidam basin. As a result of numerical simulation with the proposed model, sediment runoff and beddeformation are well simulated in both ways. |
