A very steady and stable hydraulic jump is usually formed in the flows involving the approaching Froude number in the range of _____________________

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Standard USBR stilling basin-II is useful for energy dissipation at the bottom of the overflow structure, if the approaching Froude number is ________________

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The formation of hydraulic jump at the foot of a spillway is one of the common methods of energy dissipation because ______________________

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The energy dissipation at the toe of the spillway is affected basically by the use of hydraulic jump in _______________________

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Which of the following helps in dissipating the residual energy and to reduce the length of the jump or the basin?

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Which of the following stilling basin help in stabilizing the flow and improve the jump performance?

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Standard stilling basin is provided at the toe of a dam spillway for energy dissipation is usually provided with auxiliary devices like chute blocks and dentated sills for the basic purpose of reducing the length of the stilling basin from about ________________

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When the tail-water depths in the river downstream of a spillway are quite low such that the tail-water curve at all discharges lies below the post jump depth curve, then the energy dissipation can be affected best by ___________________

asked Sep 26, 2023 in Irrigation Engineering by Carter (75.2k points)

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_____________________ are suitable only for low spillways or weirs.

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The most ideal condition for energy dissipation in the design of spillways is the one when the tail-water rating curve coincides with the jump rating curve at all discharge.

asked Sep 25, 2023 in Irrigation Engineering by Carter (75.2k points)

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The device which does not help in energy dissipation at the bottom of a hydraulic structure over which water spills is ________________

asked Sep 25, 2023 in Irrigation Engineering by Carter (75.2k points)

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A sloping apron is provided partly above the river bed and partly below the river bed in case of ____________________________

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What is the expected solution for the case when the T.W.C is lying above the J.H.C curve at all discharges?

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Which of the following stilling basin is applicable to only rectangular cross-sections?

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The surplus reservoir water after spilling over the crest of the spillway flows on the chute is __________________

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________________ are used only for very minor works.

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Calculate the effective length of the spillway which consists of 6 spans having a clear width of 10 m each. The thickness of each pier may be taken as 2.5 m and the total design head on the crest including velocity head is 16.3 m. Assuming 90° cut water nose piers and rounded abutments.

asked Nov 9, 2023 in Irrigation Engineering by Carter (75.2k points)

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An ogee spillway of a concrete gravity dam having FRL of 328 m and MWL of 340 m is provided with vertical gates between piers erected on the spillway. The effective length of the spillway is 60 m. The discharge through the spillway when gates are opened up to the actual reservoir level of 331.0 m will be_____________

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For a saddle siphon, the maximum operative head is 4.53 m. The width and height of the throat of the siphon are 5 m and 2.25 m respectively. The coefficient of discharge is 0.90. How many units are required to pass a flood of 350 cumecs? (Assume g = 10 m/s^2)

asked Sep 25, 2023 in Irrigation Engineering by Carter (75.2k points)

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Calculate the freeboard for the top levels of the side walls if the mean velocity of water in the chute reach is 3.5 m/s and the mean depth of water in the chute reach under consideration is 4.7 m.

asked Nov 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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