| Summary: | To minimize the sedimentation problems upstream of weirs and to increase the capacity and accuracy of these devices, a combination of a V-notch weir and a rectangular sluice gate was proposed and studied experimentally. Different models with different geometric combinations were tested. These geometries include, gate opening, gate length and V-notch angle. Experiments were conducted for free gate flow (unsubmerged) conditions on horizontal and sloping channels. Results showed that flow passes through the device is affected by the device geometry and the flow parameters. Semi-empirical discharge equation was developed. The equation represents the collected experimental data well with an absolute error less than 4%.
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