Abstract
The arrangement of groins in meandering rivers has been mainly determined on the basis of hydraulic model experiments and engineering judgement. These method have a weak point not to be able to determine groin arrangement to river courses with arbitrary bank alignment. At the standpoint that the numerical model and the hydraulic model test are complemental to each other, a three dimensional numerical model was developed to decide hydraulically optimum arrangement of the groin in meandering rivers. The result of calculation showed very good coincidence to that of the authors' large-scale hydraulic experiments with regard to the three dimensional flow field and the river bed variation, irrespective of flows with groins and without groins. This model also enabled us to decide the optimum arrangement of the groins to river with arbitrary bank alignment.
