# Civil Engineering - Hydraulics - Discussion

Discussion Forum : Hydraulics - Section 3 (Q.No. 48)

48.

Manning's formula is used for

Discussion:

17 comments Page 1 of 2.
Sunny said:
3 years ago

Manning formula for head loss is;

H = n2.v2.l/r4/3.

H = n2.v2.l/r4/3.

(1)

Qateel said:
4 years ago

Yes, Both A and B are correct.

Shubham said:
5 years ago

Yes, Option A is correct.

Pratik said:
5 years ago

The Manning equation is a widely used and very versatile formula in water resources. It can be used to compute the flow in an open channel, compute the friction losses in a channel, derive the capacity of a pipe, check the performance of an area-velocity flow meter, and has many more applications.

Pankaj dubey said:
5 years ago

V=1/n * R^2/3 * S^1/2.

Here;

v = Velocity.

n = Manning's Roughness Coefficient,

R = Hydraulic Radius,

S = Channel Slope or friction slope,

Note- Manning's Equation can be rearranged to solve for slope (S), which is termed the friction slope sf. The friction slope is part of the gradually varied flow used to solve for the water surface profile through a culvert.

Here;

v = Velocity.

n = Manning's Roughness Coefficient,

R = Hydraulic Radius,

S = Channel Slope or friction slope,

Note- Manning's Equation can be rearranged to solve for slope (S), which is termed the friction slope sf. The friction slope is part of the gradually varied flow used to solve for the water surface profile through a culvert.

Subhadeep said:
5 years ago

Please give the explanation of the answer.

Vikki said:
5 years ago

A is the correct.

Basavaraj said:
6 years ago

Option A is correct because of Chezzy equation= √ (8g/f).

Bdk said:
6 years ago

Option A is correct.

Priya said:
6 years ago

Agree @Gurpreet Singh.

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