Abstract
A series of experiments are performed to measure the mean velocity, turnbulence intensity and boundary shear stress distributions in compound channels with rough floodplains. Three different floodplain widths, main channel widths, and heights are used to understand the effects of varing channel geometry, size, the ratio of flow depth to the main channel depth and roughness elements. From these results the strong relation is observed between the mean velocity structure, turbulence structure and shear distribution. It is found, especially, that the roughness element on the floodplains strongly effects the flow structure in compound channel.
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