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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?

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+1 vote
in Irrigation Engineering by (75.2k points)
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?

(a) The coordinates of the lower nappe

(b) The coordinates of the upper nappe

(c) Both the coordinates of upper and lower nappe

(d) The origin or apex of crest

I got this question during an online exam.

My query is from Ogee Spillway topic in division Spillways, Energy Dissipators and Spillway Gates of Irrigation Engineering

1 Answer

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by (106k points)
Correct choice is (b) The coordinates of the upper nappe

The explanation is: The crest profile is determined by the coordinates of the lower nappe. The plotting of the upper nappe is useful in determining the clearance for the spillway deck bridge and the top levels of the training walls on the side of the spillway.

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