Hydraulic characteristics of flow over compound crested weir

Abstract EN

The hydraulic characteristics of a compound crested inclined weir which consists of both quarter round and sharp crest weir configuration under free conditions were studied experimentally in order to investigates the discharge coefficient Cd and the performance of weirs for discharge.

The experimental tests were carried out on a model of weir manufactured of compound crest shape fixed perpendicular and inclined with an angles 35°, 45° and 60° across the direction of flow in the experimental channel.

Number of flow discharge was dependent.

Results showed that the model with an angle of weir inclination of 35° with the center line of the channel had a better performance than the other models (i.e = 45°, 60° and 90°).

The conclusions concerning the flow characteristics over the compound crested weir agree with all the previous works on the semicircular and sharp crested weirs.