What is the value of the pier abutment coefficient for pointed nose piers?

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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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What is the value of abutment contraction coefficient for square abutment with headwall perpendicular to the direction of flow?

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The greater is the divergence from the streamline flow, greater is the contraction coefficient.

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What is the assumption that is taken during the entire design of an overflow spillway?

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The discharge passing over an ogee spillway per unit length of its apex line is proportional ___________________

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When the crest of an ogee spillway is designed to be in accordance with the lower nappe of a free-falling water jet over a duly ventilated sharp-crested weir then theoretically

asked Sep 17, 2023 in Irrigation Engineering by Carter (75.2k points)

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If a flood enters a dam reservoir at F.R.L, the efficiency of its ogee spillway will ______________

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

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The velocity of approach has found to be negligible effect upon discharge if ____________

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

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When the gated sluices are provided through the body of the dam spillway then the ogee spillway structure shall normally be of Corbel type.

asked Sep 25, 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_____________

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

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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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What is the satisfactory radius for the reverse bottom curve which is provided at the downstream end of the spillway?

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

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

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The siphons installed over overflow dams constitute what are known as __________________

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

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Which one of the following gate is not suitable for curved crests?

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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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Which of the following plot is useful in determining the clearance for the spillway deck bridge and the top levels of walls on the side of the spillway?

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

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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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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 ________________

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

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Which of the following gate is not suitable for smaller spillways?

asked Sep 17, 2023 in Irrigation Engineering by Carter (75.2k points)

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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 ________________

asked Sep 5, 2023 in Irrigation Engineering by Carter (75.2k points)

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_____________________ are suitable only for low spillways or weirs.

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

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