+1 vote
in Irrigation Engineering by (75.2k points)
Which of the following helps in dissipating the residual energy and to reduce the length of the jump or the basin?

(a) Dentated sills

(b) Chute blocks

(c) Roller bucket

(d) Baffle piers

I have been asked this question during an interview.

The origin of the question is Energy Dissipation Below Overflow Spillway topic in portion Spillways, Energy Dissipators and Spillway Gates of Irrigation Engineering

1 Answer

0 votes
by (106k points)
Right answer is (a) Dentated sills

The explanation is: Chute blocks help in stabilizing the flow and thus improve the jump performance. Baffle piers help in breaking the flow and dissipate energy mostly by the impact. Dentated sills are generally provided at the end of the stilling basin and diffuse the residual portion of high-velocity jet reaching the end of the basin.

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