Question

In: Civil Engineering

A 40 m long concrete box culvert (n = 0.012) will be laid on a slope...

A 40 m long concrete box culvert (n = 0.012) will be laid on a slope S =
0.001. The inlet will have a headwall parallel the embankment and the
entrance will be beveled on three sides. What should be the width, b, of
the culvert if D = 1 m TW = 1.1 m, Q = 1.8 m3/s, and the HW < 3.0 m.
Assume that the outlet creates the maximum headwater for your solution.

Expert Solution

Given Data:-

L=40 m

n=Mannings Constant = .012

S=slope=0.001

D=1 m

TW=Tailwater depth=1.1 m

Q=discharge from culvert=1.8 m3/sec

HW=Headwater depth=3 m

The equation for headwater depth is given by-

where R= hydraulic radius

Putting all values in HW Equation, we get,

Solving this equation for b, we get,

Ally Wells answered 1 year ago

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