+1 vote
in Irrigation Engineering by (75.2k points)
When the velocity is further increased beyond the stage where sand waves are formed in association with the surface waves, the waves are then called as ____________

(a) dunes

(b) ripples

(c) flat surface

(d) antidunes

This question was posed to me in a dream while sleeping

This intriguing question originated from Sediment Load in portion Sediment Transport and Irrigation Channels Design of Irrigation Engineering

1 Answer

0 votes
by (106k points)
Correct answer is (d) antidunes

Best explanation: As the velocity is further increased, the surface waves become so steep that they move upstream and break intermittently and the sediment particles keep on moving downstream only. The flow becomes super-critical and sand waves are then called antidunes.

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