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What is Bazin’s profile?

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in Irrigation Engineering by (75.2k points)
What is Bazin’s profile?

(a) Profile for the lower nappe of a free-falling jet

(b) The profile obtained for the upper nappe of a free-falling jet

(c) Crest profile

(d) Profile of both upper and lower nappe

The question was posed to me in quiz.

This key question is from Ogee Spillway in portion Spillways, Energy Dissipators and Spillway Gates of Irrigation Engineering

1 Answer

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by (106k points)
Correct option is (a) Profile for the lower nappe of a free-falling jet

To explain I would say: The theoretical profile obtained for the lower nappe of a free-falling jet is known as Bazin’s profile. Theoretically, this profile causes no negative pressure on the crest under the designed head. But in practice, negative pressure on such a profile seems inevitable.

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