開水路非定常流の数値計算法について

Abstract

The present study deals with the technique of numerical simulation of unsteady flow ina flume and floods in river. The fundamental equations are expressed in conservation lawsystem and transformed into characteristics forms, which are reduced to linear combinationsof equations of continuity and motion. Difference scheme for method of characteristics will beestablished according to the direction of each characteristics and compared with Lax-Wendroffscheme. Comparative studies have been made on unsteady flow in a flume and a real flood inYodo river. The result shows that the method of characteristics will be usefully applied to gra-dually varied unsteady flows.