Irrigation Engineering Diversion Head Works | Civil Engineering
The works, which are constructed at the head of the canal, in order to divest the river water into the canal are known as diversion head works. * If the major part or entire ponding of water is achieved by a raised crest, the barrier is known as a weir. On the other hand, if most of ponding is by gates, then the barrier is known as a barrage. * Type of weir are: 1. Masonry weirs with vertical drop 2. Rock-fill weirs with sloping aprons 3. Concrete weirs with sloping glacis * A structure which enables the fish to pass upstream of weir is known as fish ladder. * A canal head regulator is provided at the head of the off-taking canal, which serves the following functions: 1. It regulates the supply of water entering the canal. 2. It controls the entry of silt in the canal 3. It prevents the river floods from entering the cana