破堤幅拡大を伴う破堤氾濫流に関する実験的研究

抄録

In this study, a hydrograph of inundation flow rate through a levee-break section installed in the meandering main channel is measured. Width of levee-break widening is changed with time using the computer controlled gate system. The flow rates through the levee-break opening and at the downstream end of the main channel are measured using weirs and PIV technique. Temporal change in the water stage profile along the meandering channel is measured using servo type water gauges. It is revealed that the difference in the levee-break widening process affects the temporal change of the flow around the levee-break section.