DESIGN OF LINED CANAL

## Design of lined canal

DESIGN OF LINED CANAL The design of line canals is always done by Kennedy’s Theory.. Following equations given by Kennedy are used in the design. $V0= 0.54mD^{0.64}$ $V= \frac{R^{2/3}S^{1/2}}{N}$ The value of N for protected type of linings is taken same as for natural soil. The value of N of natural soil varies from 0.02 to 0.025. In order to obtain the most economical section, it is necessary to adopt the best discharging section. The flow will be greater when the friction is least. This happens when wetted perimeter is least for any particular given area of the channel. In other words, the discharge will be maximum when Hydraulic mean depth (H.M.D.) is maximum. A semi-circular section of channel is considered as the best theoretical section. But Trapezoidal channel section is mostly adopted on practical grounds. In order to increase the H.M.D., the angle subtended at the corners at bottom…

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