Author(s): Takeshi Okabe; Toyokatsu Yuuki; Maki Kojima
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Abstract: This paper is concerned with bed-load rate on movable river beds covered by vegetation. First., f'lume experiments are c. arried out wit. h two types of plant-model which are cylindrical and curved, and branched and inclined. Secondly, a one-dimensional k-ε turbulent flow model is proposed in order to estimate effi-cient tractive force of bed-load. Modell validation is performed based on velocity data collected in the experiments. The relationship between the efficient tractive force evaluated by the present model and measured bed-load rate is represented satisfactorily by Ashida-Michiue's bed-load formula.
Year: 1997