What are the components of diversion headwork with typical layout?
Weir or barrage. Scouring sluices or under sluices. Divide wall. Fish ladder.
How is diversion weir aligned?
Weirs are usually aligned at right angles to the direction of flow in the river. The ponding up of river for diversion of water into the off taking canal is achieved by means of gates (instead of shutters).
What are the components of a diversion head work?
Components of Diversion Head Works | Irrigation | Agriculture
- Component # 1. Weirs:
- Component # 3. Divide Wall:
- Component # 4. Fish Ladder:
- Component # 5. Log Chute:
- Component # 6. Main Canal Head Regulator:
- Component # 7. Regulation of Head Regulator:
- Component # 8. Silt Control at Head Regulator:
How many components the diversion headwork is divided?
Explanation: The diversion head work is generally divided into eight component parts, namely weir, divide wall, fish ladder, pocket or approach ladder, scouring sluices, silt prevention devices, canal head regulator, and river training works. 2.
What is diversion headwork?
Diversion headworks is a structure constructed across a river for the purpose of raising the water level in the river so that it can be diverted into the off taking canals. It is also known as canal headworks and performs the following functions. It raises the water level on upstream side.
What is the main function of diversion headwork?
Diversion head works like Weir or barrage is constructed across a perennial river to raise water level and to divert the water to canal, is known as diversion head work Flow of water in the canal is controlled by canal head regulator.
What is meant by diversion weir?
Home > Resources > Irrigation > Source of Irrigation > Diversion Weirs. DIVERSION WEIRS. Weir is a low obstruction that is built across a river or canal to raise the water level, or in parallel to divert the water. Two types of weirs are used to control flow; an in-stream weir and a diversion weir.
When a canal and a drainage approach each other at the same level the structure so provided is 1 point?
(a) Level crossing: A level crossing is provided when the canal and the drainage are practically at the same level. In a level crossing, the drainage water is admitted into the canal at one bank and is taken out at the opposite bank.
What does diversion structures or diversion head works contain?
Temporary diversion headworks consist of a spur or bund constructed across the river to raise the water level in the river and divert it into the canal. These bunds may be required to be constructed every year after the floods, because they may be damaged by the floods.
How many main functions of a head regulator are?
Explanation: The main functions of a head regulator are to control and regulate the water entering the off take channel, to serve as a meter for measuring discharge, and to control silt entering into the off take channel. 9.
How many groups the weir is divided?
Explanation: According to the material used and certain design features, the gravity weir is sub-divided into three groups. They are vertical drop weir, sloping weir, and parabolic weir.
What are the function of diversion headwork?
What is the purpose of diversion head works?
Diversion head works Weir or barrage is constructed across a perennial river to raise water level and to divert the water to canal, is known as diversion head work. Flow of water in the canal is controlled by canal head regulator. 6.
Where does the silt go in diversion headworks?
The suspended silt goes on the depositing in front of the canal head regulator. When the silt deposition becomes appreciable the gates are opened and the deposited silt is loosened with an agitator mounting on a boat. The muddy water flows towards the downstream side through the scouring sluices.
Where are most of the diversion works located?
The longitudinal slope of the river is small and velocity of flow moderate. This length of the river is the largest of all other lengths. Diversion works are mostly located in this length. The area to be irrigated lies very near to this length and thus reduces the overall length of the canal network.
How big is the divide wall in a diversion head?
The top width of the divide wall is about 1.5 to 2.5m. The divide wall extends on the upstream side up to a distance little beyond the beginning of the canal head regulator and on the downstream side up to the end of the loose protection. Large rivers have various types of fish, many of which are migratory.