Local scour at obstructions in rivers, Civil Engineering

Assignment Help:

Q. Local Scour at obstructions in rivers?

When the water flow in river is deflected by obstructions such as bridge piers, scouring would occur arising from formation of vortexes. The mechanism of formation of vortices is as below: the flow hits the bridge piers and tends to move downwards. When flow reaches the seabed, it will move in a direction opposite to its original flow direction before hitting bridge piers. Therefore this movement of flow before bridge piers results in the formation of a vortex. Owing to formation of this vertical vortex, seabed material is continually removed so that holes are formed at the seabed and this result in local scour at bridge piers. As the shape of vortices looks such as horseshoes, it's sometimes known as 'horseshoe vortex'.


Related Discussions:- Local scour at obstructions in rivers

Evaluate dimensions of apron according to spring and gale, Q. Evaluate dime...

Q. Evaluate dimensions of apron according to Spring and Gales? Dimensions of apron according to Spring and Gales. Gales and Sethi favoured uniform thickness of laid apron while

Explain the cross sectional area of flow, Cross-sectional area of flow (ft ...

Cross-sectional area of flow (ft 2 ) (A) For rectangular channels = (w)(d). For trapezoidal channels, divide the flow area into two side triangles and one center rectangle, so

How do you determine specific gravity of cement, Cement is usually purchase...

Cement is usually purchased as a powdery substance that is mixed with sand, aggregate, gravel, and water to form concrete. As the cement itself is usually a powder, it is hard to c

Chemistry, Construction and working of calomel electrode

Construction and working of calomel electrode

Principal stresses and strains, Principal Stresses and Strains: Princi...

Principal Stresses and Strains: Principal Stresses and Strains is a very important link in the analysis of solids so as to make sure safe design of different components of str

Vacancy for teaching?, I am a civil engineer and interested to teach.Is the...

I am a civil engineer and interested to teach.Is there any vacancy?

Settlement due to increasing load on surrounding soil, Q. Settlement due to...

Q. Settlement due to Increasing Load on Surrounding Soil? When any portion of the ground surface  has been loaded, it causes  the surface  of adjacent soil also to tilt and set

Lintel, Classification of lintels

Classification of lintels

Define pavement design - transportation, Define Pavement Design - Transport...

Define Pavement Design - Transportation 1. Asphalt surface a. Estimate Design Traffic b. Determine the Structural Number (SN) for the given traffic, roadway, and soil cha

Explain information processing and perception, Explain Information Processi...

Explain Information Processing and Perception - Driver Performance The time required to respond successfully to any driving situation, such as an emergency, involves four stage

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd