Abstract
Although several physically based sediment runoff models had been proposed, sediment production and sediment supply to the river channel hadn't been considered in detail. In this paper, we introduced freeze-thaw action model and gully erosion model for sediment production, and talus erosion model for sediment supply. Each numerical model was connected to sediment transport model proposed by Egashira and Matsuki.
Applying this combined model to a real mountainous basin, we confirm that this model can express some of sediment runoff characteristics in a mountainous basin, for example seasonal variation of sediment runoff, temporal variation of the deposited sediment amount in talus, and difference of riverbed deformation between upstream and downstream.
