Afflux on account of obstruction to flow, Civil Engineering

Assignment Help:

Q. Afflux on account of obstruction to flow?

Even if the river constriction on account of approach banks is not excessive and bridge waterway is wider than that causing critical discharge intensity, afflux can still be generated due to obstruction to flow by piers. Separation eddies forming at such obstructions result in loss of head which shows as afflux upstream of the bridge.

h = [(V2 / 17.88) + 0.01524] [(A/a)2-1]

wherein h is afflux in m, V is velocity in m/s in unobstructed stream, A is unobstructed sectional area of the river in m2 and a is obstructed sectional area of the river in m2. Other formulae in wide use are due to Negler and Yarnell.

More recently, the Bureau of Public Roads U.S.A., have adopted procedure for estimation of afflux detailed in Hydraulics of Bridge Waterway.

 


Related Discussions:- Afflux on account of obstruction to flow

Determine the uses of screw connectors, Determine the uses of Screw connect...

Determine the uses of Screw connectors Screw connectors are normally used  to splice large-diameter high-tensile strength bars. The bars are threaded at the ends and a sheet-me

Show disadvantages of excessive concrete covers, Q. Disadvantages of excess...

Q. Disadvantages of excessive concrete covers? In reinforced concrete structures cover is generally provided to protect steel reinforcement from corrosion and to provide fire r

English, Features of literary writing

Features of literary writing

Solid block -calculating for design mix, Good evening sir, solid block''s d...

Good evening sir, solid block''s design mix calculated generally please explain and derive .

Calculate the aisc lrfd strength criteria, Check if the given beam and load...

Check if the given beam and loading satisfy the AISC LRFD strength criteria. The beam section is a W 16*31 of A36 steel and it is laterally supported at the ends at the load points

State the effect of stretched tendons, State the effect of stretched tendon...

State the effect of stretched tendons The effect of stretched tendons inside the concrete components is just like a stretched spring. If a spring is stretched it would like to

Write short note on skv process of thermit welding, Q. Write short note on...

Q. Write short note on SKV  process of thermit welding? This term is used for welding by Alumino thermic process with short preheat time. The time required for preheat with pet

Graphics, 1. Draw the projections of a line AB that is 50 mm long and is pa...

1. Draw the projections of a line AB that is 50 mm long and is parallel to both the HP and the VP. The line is 40 mm above the HP and 25 mm in front of the VP. 2. A line AB, 50 mm

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