Abstract
Effects of the plane shape of a weir on the downstream flow structures are experimentally examined. Arched weirs having different curvatures, an arched one set in reverse direction and a straight type weir, are used for experimental study. Mean and turbulent velocity distributions and shear stress distributions are measured in the downstream region of each weir. It is found that arched weirs converge the flow to the center portion of the channel, while a reverse-arched type diverges the main stream to the side portions of the channel. Deduced structures of the flows are also presented.
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