In this paper the rapidly varied unsteady flow caused by the failure of a dam in a rectangular dry bed horizontal channel has been studied both theoretically and experimentally. Experiments with dam-break flows in smooth and rough channel have been carried out. Comparisons have been made between measured depth hydrographs at different stations along the channel and analytical solution of Ritter...

Free-surface flows through a staggered cylinder array were investigated in an open-channel flume. The cylinders simulated rigid emergent vegetation. Specifically, we studied four flow cases with two-factor design comprising rate (7 and 13 l s−1) bed-surface state (hydraulically rough smooth). We have primarily assessed the effects of bed roughness shallowness on time-averaged structure transver...

Experiments are conducted in an open-channel flow where half of the section is smooth and other consists array cubes, which either submerged or emergent. A shear layer featuring large-scale Kelvin–Helmholtz structures develops between two subsections. The flows first analysed framework double-averaging method (averaging both time space). Double averaging could be performed thanks to experimenta...