A fish ladder is device by which flow energy can be dissipated in such a manner as to provide easy access to the downstream fish to come on upstream side, the velocity of flow varies from___________________?
A. 2.0 – 2.5 – m/sec
B. 2.5 – 3 m/sec
C. 3.0 – 3.5 m/sec
D. 3.5 – 4.0 m/sec