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The crest of a siphon spillway is fixed at ________________

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+1 vote
in Irrigation Engineering by (75.2k points)
The crest of a siphon spillway is fixed at ________________

(a) full reservoir level

(b) dead storage level

(c) maximum water level

(d) top of the dam

I had been asked this question in an interview for job.

This key question is from Shaft Spillway topic in chapter Spillways, Energy Dissipators and Spillway Gates of Irrigation Engineering

1 Answer

0 votes
by (106k points)
Correct option is (a) full reservoir level

The best explanation: The crest of a siphon spillway is fixed at FRL. When the water level in the reservoir rises above FRL the sheet of water starts spilling over the crest. When the waterfalls to FRL, air enters the vent and siphonic action is stopped.

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