Site Selection for Barrage
When the angle between the headwork axis and the river axis exceeds 10°, the problem arises of concentration of flow on one side and island formation due to heavy silting within the guide bank on the other side. If the river axis is to the right of headwork axis, the concentration of flow is generally generally on the left side with consequent tendency to form an island
Bligh's Creep Theory for Hydraulic Structures
Bligh's Creep Theory: Design of impervious floor for sub surface flow: It is directly depended on the possibilities of percolation in porous soil on which the floor (apron) is built. Water from upstream percolates and creeps (or travel) slowly through weir base and the subsoil below it. The head lost by the creeping water is proportional to the distance it travels (creep length) along the base of the
What is Canal Head Regulators and Types of Canal Head Regulators
Structure at the head of canal taking off from a reservoir may consist of number of spans separated by piers and operated by gates. Regulators are normally aligned at 90° to the weir. Up to 10" are considered preferable for smooth entry into canal. The functions of canal head regulator are: To admit water into the off taking canal. To regulate the supplies into the canal.
Khosla's Theory of Hydraulic Structures
After studying a lot of dam failure constructed based on Bligh’s theory, Khosla came out with the following: Following are some of the main points from Khosla's Theory. From observation of Siphons designed on Bligh's theory, by actual measurement of pressure, with the help of pipes inserted in the floor of two of the siphons? Does not show any relationship withHow to Design Barrage
The Barrage and the Head Regulators of feeder channels and appurtenant structures will be designed on the basis of standard design criteria established for other barrages and allied structures, already constructed on the Indus River and its tributaries.
Types, Importance and Definition of Canal Falls
Irrigation canals are constructed with some permissible bed slopes so that there is no silting or scouring in the canal bed. But it is not always possible to run the canal at the desired bed slope throughout the alignment due to the fluctuating nature of the country slope. Generally, the slope of the natural ground surface is not uniform throughout the alignment. Sometimes,Effects of Slope of Chute on Stilling Basin
A factor which occasionally affects stilling basin operation is the slope of the chute upstream from the basin. The foregoing experimentation was sufficiently extensive to shed some light on this factor.
Advantages & Disadvantages of Lateral Intake
When a certain amount of water is to be diverted from a river stream to some other location different types of structures are used such as weir, notches etc. Now to carry this amount of water to place where it can be used for some useful output different types of
