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A spillway discharges flood flow at the rate of 9 m3 /s per metre width. If the depth of flow on the horizontal apron at the toe of the spillway is 46 cm, the tail water depth needed to form a hydraulic jump is approximately given by which of the following options?
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- 2.54 m
- 4.90 m
- 5.77 m
- 6.23 m
- 2.54 m
Correct Option: C
q = 9 m³/s/m.width
y2 = 46 cm
| = | [ - 1 + √1 + 8F²2 ] | |||
| y2 | 2 |
| F2 = | = | = 9.21 | ||
| √g y³ | √9.81 × (0.46)³ |
| y1 = | [ - 1 + √1 + 8(9.21)²] | |
| 2 |
= 5.77 m.
