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The primary purpose of a division wall is to provide a barrier between the turbulent floodwaters on one side and the calmer waters in the pocket in front of the canal head on the other side. It is helpful in preventing parallel flow, which would otherwise be created by the construction of deep channels extending from the river to the pocket in front of the sluices. This flow would be perpendicular to the axis of the barrage.
Why separation wall is provided in barrage?
The main functions offered by the dividing wall are:
It helps by providing a pocket that is somewhat less turbulent near the canal head regulator, which ultimately leads to the deposition of silt in this pocket and, as a result, assists in the entry of water that is free of silt into the canal.
In a barrage, what exactly is a dividing wall?
It is a lengthy wall that has been built at a right angle to the axis of the weir. It is extended all the way up to the head regulator of the canal, which is located upstream.
Where exactly is a wall that separates the two areas?
In front of the canal head regulator is a rather quiet nook that was created by the partition wall. This effect concentrates more silt in lower layers of water entering the pocket.
What are the barrage’s different functions?
A barrage is a specific kind of low-head diversion dam that consists of a number of big gates that may be opened or shut in order to control the volume of water that is allowed to pass through. This permits the structure to manage and stabilize river water elevation upstream for use in irrigation and other systems.
Headworks Diverting Traffic
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What are barrage components?
The main body of the barrage consists of a conventional RCC slab that supports the steel gate. This is the main component of the barrage. Upstream concrete floor, to stretch the path of seepage and to project the center area where the pier, gates, and bridge are placed. This is what it looks like in the X-section.
What is the primary difference between dam and Ware?
The only significant difference between a dam and a weir is that the dam can hold water for a significantly longer period of time in comparison to the weir, and the dam is situated at a higher elevation than the weir. 7.
What is the main difference between a barrage and a weir?
It is possible to raise the water level on the upstream side of a river by constructing a weir, which is an impenetrable barrier that is built across the river. On the other hand, a barrage is a type of dam that utilizes gates that can be adjusted that are positioned on top of the dam to control the height of the water surface at various times and levels. The height of the water can be altered by opening the appropriate valves or gates.
Why do we have to line the canal if it’s already been lined?
The act of applying an impervious coating to the margins of the trench is known as canal lining. This helps to reduce the amount of irrigation water that is lost due to seepage. The lining of a canal helps reduce waterlogging around low-lying portions of the canal, which is another benefit of lining the canal. When the permeability of a canal is reduced, the water moving through it moves more quickly, which results in a bigger discharge overall.
When will the silt excluder be installed?
Upstream of the head regulator are the works known as silt excluders. They are structures that are built on the bed of the river. The water with the least amount of sediment enters the head regulator, while the water with the most sediment enters the silt excluder. Before the water is allowed to enter the canal, the silt is therefore filtered out of it using this type of infrastructure.
What is the divide wall?
: a wall subdividing a building into major portions – compare fire wall, party wall.
What exactly do we mean when we talk about headworks?
The term “headworks” refers to any facility that is located at the beginning of a waterway or at a point where the waterway is diverted. The diversion of water from a river into a canal or from a large canal into a smaller canal is accomplished with the help of this structure, which is more compact than a barrage.
How many different kinds of barrages may be found in Pakistan?
The System is made up of six major rivers and their catchments. These rivers are the Indus, Jhelum, Chenab, Ravi, and Sutlej. The Kabul River is also a part of the System. It features about 120,000 watercourses in addition to three major storage reservoirs, 19 barrages, 12 inter-river connection canals, and 40 main canal commands. Overall, it includes over 120,000 waterways.
How many of the primary functions does the head regulator take care of?
The primary jobs of a head regulator are to manage and regulate the water that is entering the off take channel, to act as a meter for measuring the discharge, and to control the silt that is entering the off take channel. 9.
What are under sluices?
Under-Sluices are apertures in a weir wall that are completely controlled by gates and have a crest that is located at a lower level than the rest of the wall. They are on the same side as the off-taking canal where they are situated. Scouring sluices are another name for under sluices due to the fact that they assist in the removal of silt from the area close to the head regulators.
What is the role of dividing wall in diversion weir?
Functions of the dividing wall include:
(2) It creates a silent pocket in front of the canal head regulator, which leads to the deposition of silt into the pocket while simultaneously permitting clear water to enter the canal. (3) It keeps the cross current away from the weir.
What are some of the benefits and drawbacks associated with lining canals?
The Many Benefits of Using Canal Lining
The lining of canals helps to reduce water loss that can occur from seepage. High seepage losses in canals would need the construction of a huge reservoir as well as a dam that is significantly larger. Thus, decreasing their impounding capacity by lining would minimize seepage, which would result in a reduction in the expenses associated with the building of these works.
What is the most significant threat to the canal lining?
There is a possibility of regular flooding, and even sudden flooding, if a canal is not lined, or if it is placed on poor foundations. This increases the risk of flooding. The embankments of unlined canals are subject to persistent erosion, which finally results in flooding. The flooding that threatens communities is a significant risk; hence, the lining of canals is beneficial for preventing or controlling this risk.
Which type of cement is typically used to line canals?
In building projects that are subjected to intense sulfate action from the surrounding water and soil, such as canal linings, culverts, retaining walls, and siphons, sulfate-resistant cement is typically utilized.
What are the goals of constructing a weir?
Weirs are immovable obstructions that are placed in the middle of a river or stream to direct the flow of water over their tops. The height of the water that is present over the weir is measured to determine the amount of water that is moving downstream.
What are the many kinds of weirs that are available?
- Weir with a pointed crest.
- Weir with a broad, crowned crest
- Crump weir
- Needle dam.
- Weir proportional to the flow.
- There is a combination weir.
- MF weir.
- V-notch weir.
Is it always the case that the upstream face of a gravity dam is vertical?
The face of a gravity dam that is facing upstream is always vertical. Explanation: It’s possible to have a vertical or an inclined upstream face in a gravity dam. In a similar manner, the axis of the dam can either be straight or it can have a curvature introduced into it during the design process.
What is meant by the term “barrage punch”?
a barrage of blows to the face. a series of blows to the face. precise (8) It was able to tie down its opponent and knock him out with a flurry of punches by learning how to do it in a boxing game. 1.
What are the primary goals of participating in mean water training?
What are the primary goals of participating in mean water training? The purpose of mean water training is to ensure efficient disposal of suspended and bed loads, and to keep the channel in good shape as a result of this.
Why is the use of barrages necessary?
These gates are opened and closed in order to exercise direct control over the volume of water that is allowed to pass through it… A barrage, in contrast to a dam, will only raise the water level by a few feet, as opposed to the dam’s ability to nearly fill the reservoir with water. The depth of a river can be increased by a few feet thanks to the construction of a barrage, which makes this an advantageous feature for navigation.