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No of Pages: 60

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Abstract:

This experiment was conducted in order to have a broader knowledge on hydraulic jump and its applications. It was performed in the hydraulic laboratory of the Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, using the TQH23, 2.52m flow rectangular channel and the HID hydraulic bench which provides water to the channel with the aid of the pump incorporated in the HID.

Five different discharges were obtained by varying the flow. Hydraulic jump was formed at four different positions for each of the discharge using both rectangular block weir and sluice gate while maintaining the same discharge. Based on the results obtained and calculated from the experiment after comparing rectangular block weir and the sluice gat, it was observed that when using the rectangular block weir that discharges shows an oscillating jump type since the value of their

Froude’s number, ratio of depth after and before the jump and fraction of energy dissipated falls within the range of the characteristics of hydraulic jump, also from fig 4.3 shows that at a
height of 0.035m, 0.037m and 0.038m of the downstream sequent depth will dissipate excess energy compare to sluice gate.

Also, for sluice gate, discharge = 0.556× /s with = 3.74, = 3.33 and fraction of energy dissipated = 44.83% formed an oscillating jump which it value of Froude’s number, ratio of depth after and before the jump and fraction of energy dissipated fall within the range of the characteristics of hydraulic jump. And also discharge = 0.625× /s with =6.29, = 6.03 and fraction of energy dissipated = 66.67% formed a stable clearly defined well balanced which it value of Froude’s number, ratio of depth after and before the jump and fraction of energy dissipated fall within the range of the characteristics of hydraulic jump. While the remaining discharges and are out of range that means their values did not fall within the range of the characteristics of hydraulic jump of table 2.2. and also fig 4.3 shows that at a height of 0.041m of downstream sequent depth will dissipate excess energy

compared to rectangular block weir.