ANS:C - velocity of flow in open channels

Chezy's formula is used to determine the velocity of flow in open channels. Chezy's formula, proposed by Antoine Chezy in 1775, relates the velocity of flow in an open channel to the channel slope and roughness coefficient. It is expressed as: V=C×R×S​ Where:

• V is the velocity of flow,
• C is Chezy's coefficient (a dimensionless constant),
• R is the hydraulic radius (the ratio of cross-sectional area to wetted perimeter),
• S is the slope of the channel.

Chezy's formula is widely used in hydraulic engineering and fluid mechanics to estimate the velocity of flow in rivers, streams, canals, and other open channels. It helps in designing and analyzing various hydraulic structures and systems, such as irrigation channels, drainage systems, and flood control measures.