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Types of weirs. (a) Masonry weirs with vertical drop. (b) Rock-fill weirs with sloping aprons. (c) Concrete weirs with sloping glacis. Masonry. Types of Weirs. (a) Masonry weirs with vertical drop. (b) Rock-fill weirs with sloping aprons. (c) Concrete weirs with sloping glacis. Lecture structure on pervious foundation- Khosla’s theory-. Design of concrete sloping glacis weir. ❑Weir or barrage is constructed across a perennial river to raise.

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Transition lengths on upstream and downstream. To make this website work, we log user data and share it with processors.

It is not meant to be read. Up stream approach 2. There is a limit for the velocity, so that the canal bed can neither be scoured nor silted up. Selection of Site for Diversion Head Works.

To with stand the impact of the high velocity jet to dissipate the energy. This movement is essential for their survival.

The cut off walls are provided at the upstream and downstream end of the floor and at the toe of the weir. The discharge is computed using the formula: But then, this is dummy text. Cut-off walls are provided at both ends. Momentum Principles in Open-Channel.


The piers consist of number tiers on which the adjustable gates are placed. Uniform Flow at Known Q and y. Sheet piles are slopinh below the cut off walls. Throat width of drop wall, Linear water way Design of Stilling Basin: Down stream expansion 5.


In this case hydraulic jump does not form, in case high drowning ratio and low falls. But in case of a barrage, the. Sloping glacis if any. Accordingly, it is difficult to figure out when to end it. The water from the under-sluice pocket is made to enter the regulator bays, so as to pass the full supply discharge into the canal.

Design Of Hydraulic Structures ~ Civil Engineering Study Materials for GATE IES SSC JE PSUs

These drops are flumed. The following are main components: When the silt deposition becomes appreciable the gates are opened and the deposited silt is loosened with an agitator mounting on a boat. In case the hydraulic jump occurs on the glacis the energy dissipation will be incomplete and additional roughening devices such as friction blocks, end sill, deflectors etc. On the upstream side, the wall is extended.

Auth with social network: Down stream Energy Dissipation. It consists of a number of piers which divide the total width of the canal into a number of spans which are known as bays.


When the weight sloling the weir i. The downstream sloping apron consists of core walls. Conversion Conversion Emoticon Emoticon.

The muddy water flows towards the downstream through the scouring sluices. Baffle falls or Inglis falls: Design of body wall Design of stilling basin Design of wings, returns. Velocity in a canal is a function of the slope of the canal.


The maximum height of these gated openings, called head sluices will be equal to the difference of Pond Level and Crest Level of the regulator. The hydraulic jump occurs on the glacis causing sufficient hydraulic jump. The length of cistern be 5Ef2 to 6Ef2 To produce reverse flow by providing suitable end wall to ensure an impact in the cistern. When there are piers Bt will glaics reduced as Zloping – 0.

The boulders are grouted properly with cement mortar.

It consists of masonry breast wall which is provided with adjustable crest shutter. Share buttons are a little bit lower.